From 441403fd1468337324b6d1d47e554dd749ea791b Mon Sep 17 00:00:00 2001
From: Jeff Emmett <jeffemmett@gmail.com>
Date: Sun, 15 Feb 2026 13:38:15 -0700
Subject: [PATCH] feat: add offline Whisper transcription fallback via
 Transformers.js

When both WebSocket streaming and server batch API are unavailable,
falls back to in-browser Whisper (Xenova/whisper-tiny, ~45MB, cached).
Shows download progress bar and transcription status during processing.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---
 next.config.mjs                  |  18 +
 package-lock.json                | 871 ++++++++++++++++++++++++++++++-
 package.json                     |   3 +-
 src/components/VoiceRecorder.tsx |  42 +-
 src/lib/whisperOffline.ts        | 120 +++++
 5 files changed, 1046 insertions(+), 8 deletions(-)
 create mode 100644 src/lib/whisperOffline.ts

diff --git a/next.config.mjs b/next.config.mjs
index e25a6a2..4e348f2 100644
--- a/next.config.mjs
+++ b/next.config.mjs
@@ -1,6 +1,24 @@
 /** @type {import('next').NextConfig} */
 const nextConfig = {
   output: 'standalone',
+  webpack: (config, { isServer, webpack }) => {
+    // @xenova/transformers depends on onnxruntime-node (native .node binaries)
+    // which can't be bundled by webpack. We only use the web ONNX runtime.
+    config.plugins.push(
+      new webpack.IgnorePlugin({
+        resourceRegExp: /onnxruntime-node/,
+      })
+    );
+    if (!isServer) {
+      config.resolve.fallback = {
+        ...config.resolve.fallback,
+        fs: false,
+        path: false,
+        os: false,
+      };
+    }
+    return config;
+  },
 };
 
 export default nextConfig;
diff --git a/package-lock.json b/package-lock.json
index 3251a5c..f8c3367 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -19,6 +19,7 @@
         "@tiptap/pm": "^3.19.0",
         "@tiptap/react": "^3.19.0",
         "@tiptap/starter-kit": "^3.19.0",
+        "@xenova/transformers": "^2.17.2",
         "dompurify": "^3.2.0",
         "lowlight": "^3.3.0",
         "marked": "^15.0.0",
@@ -108,6 +109,15 @@
       "license": "MIT",
       "optional": true
     },
+    "node_modules/@huggingface/jinja": {
+      "version": "0.2.2",
+      "resolved": "https://registry.npmjs.org/@huggingface/jinja/-/jinja-0.2.2.tgz",
+      "integrity": "sha512-/KPde26khDUIPkTGU82jdtTW9UAuvUTumCAbFs/7giR0SxsvZC4hru51PBvpijH6BVkHcROcvZM/lpy5h1jRRA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/@jridgewell/gen-mapping": {
       "version": "0.3.13",
       "resolved": "https://registry.npmjs.org/@jridgewell/gen-mapping/-/gen-mapping-0.3.13.tgz",
@@ -420,6 +430,70 @@
         "@prisma/debug": "6.19.2"
       }
     },
+    "node_modules/@protobufjs/aspromise": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/@protobufjs/aspromise/-/aspromise-1.1.2.tgz",
+      "integrity": "sha512-j+gKExEuLmKwvz3OgROXtrJ2UG2x8Ch2YZUxahh+s1F2HZ+wAceUNLkvy6zKCPVRkU++ZWQrdxsUeQXmcg4uoQ==",
+      "license": "BSD-3-Clause"
+    },
+    "node_modules/@protobufjs/base64": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/@protobufjs/base64/-/base64-1.1.2.tgz",
+      "integrity": "sha512-AZkcAA5vnN/v4PDqKyMR5lx7hZttPDgClv83E//FMNhR2TMcLUhfRUBHCmSl0oi9zMgDDqRUJkSxO3wm85+XLg==",
+      "license": "BSD-3-Clause"
+    },
+    "node_modules/@protobufjs/codegen": {
+      "version": "2.0.4",
+      "resolved": "https://registry.npmjs.org/@protobufjs/codegen/-/codegen-2.0.4.tgz",
+      "integrity": "sha512-YyFaikqM5sH0ziFZCN3xDC7zeGaB/d0IUb9CATugHWbd1FRFwWwt4ld4OYMPWu5a3Xe01mGAULCdqhMlPl29Jg==",
+      "license": "BSD-3-Clause"
+    },
+    "node_modules/@protobufjs/eventemitter": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/@protobufjs/eventemitter/-/eventemitter-1.1.0.tgz",
+      "integrity": "sha512-j9ednRT81vYJ9OfVuXG6ERSTdEL1xVsNgqpkxMsbIabzSo3goCjDIveeGv5d03om39ML71RdmrGNjG5SReBP/Q==",
+      "license": "BSD-3-Clause"
+    },
+    "node_modules/@protobufjs/fetch": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/@protobufjs/fetch/-/fetch-1.1.0.tgz",
+      "integrity": "sha512-lljVXpqXebpsijW71PZaCYeIcE5on1w5DlQy5WH6GLbFryLUrBD4932W/E2BSpfRJWseIL4v/KPgBFxDOIdKpQ==",
+      "license": "BSD-3-Clause",
+      "dependencies": {
+        "@protobufjs/aspromise": "^1.1.1",
+        "@protobufjs/inquire": "^1.1.0"
+      }
+    },
+    "node_modules/@protobufjs/float": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/@protobufjs/float/-/float-1.0.2.tgz",
+      "integrity": "sha512-Ddb+kVXlXst9d+R9PfTIxh1EdNkgoRe5tOX6t01f1lYWOvJnSPDBlG241QLzcyPdoNTsblLUdujGSE4RzrTZGQ==",
+      "license": "BSD-3-Clause"
+    },
+    "node_modules/@protobufjs/inquire": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/@protobufjs/inquire/-/inquire-1.1.0.tgz",
+      "integrity": "sha512-kdSefcPdruJiFMVSbn801t4vFK7KB/5gd2fYvrxhuJYg8ILrmn9SKSX2tZdV6V+ksulWqS7aXjBcRXl3wHoD9Q==",
+      "license": "BSD-3-Clause"
+    },
+    "node_modules/@protobufjs/path": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/@protobufjs/path/-/path-1.1.2.tgz",
+      "integrity": "sha512-6JOcJ5Tm08dOHAbdR3GrvP+yUUfkjG5ePsHYczMFLq3ZmMkAD98cDgcT2iA1lJ9NVwFd4tH/iSSoe44YWkltEA==",
+      "license": "BSD-3-Clause"
+    },
+    "node_modules/@protobufjs/pool": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/@protobufjs/pool/-/pool-1.1.0.tgz",
+      "integrity": "sha512-0kELaGSIDBKvcgS4zkjz1PeddatrjYcmMWOlAuAPwAeccUrPHdUqo/J6LiymHHEiJT5NrF1UVwxY14f+fy4WQw==",
+      "license": "BSD-3-Clause"
+    },
+    "node_modules/@protobufjs/utf8": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/@protobufjs/utf8/-/utf8-1.1.0.tgz",
+      "integrity": "sha512-Vvn3zZrhQZkkBE8LSuW3em98c0FwgO4nxzv6OdSxPKJIEKY2bGbHn+mhGIPerzI4twdxaP8/0+06HBpwf345Lw==",
+      "license": "BSD-3-Clause"
+    },
     "node_modules/@remirror/core-constants": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/@remirror/core-constants/-/core-constants-3.0.0.tgz",
@@ -977,6 +1051,12 @@
       "integrity": "sha512-sVDA58zAw4eWAffKOaQH5/5j3XeayukzDk+ewSsnv3p4yJEZHCCzMDiZM8e0OUrRvmpGZ85jf4yDHkHsgBNr9Q==",
       "license": "MIT"
     },
+    "node_modules/@types/long": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/@types/long/-/long-4.0.2.tgz",
+      "integrity": "sha512-MqTGEo5bj5t157U6fA/BiDynNkn0YknVdh48CMPkTSpFTVmvao5UQmm7uEF6xBEo7qIMAlY/JSleYaE6VOdpaA==",
+      "license": "MIT"
+    },
     "node_modules/@types/markdown-it": {
       "version": "14.1.2",
       "resolved": "https://registry.npmjs.org/@types/markdown-it/-/markdown-it-14.1.2.tgz",
@@ -997,7 +1077,6 @@
       "version": "20.19.33",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-20.19.33.tgz",
       "integrity": "sha512-Rs1bVAIdBs5gbTIKza/tgpMuG1k3U/UMJLWecIMxNdJFDMzcM5LOiLVRYh3PilWEYDIeUDv7bpiHPLPsbydGcw==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "undici-types": "~6.21.0"
@@ -1047,6 +1126,20 @@
       "integrity": "sha512-zFDAD+tlpf2r4asuHEj0XH6pY6i0g5NeAHPn+15wk3BV6JA69eERFXC1gyGThDkVa1zCyKr5jox1+2LbV/AMLg==",
       "license": "MIT"
     },
+    "node_modules/@xenova/transformers": {
+      "version": "2.17.2",
+      "resolved": "https://registry.npmjs.org/@xenova/transformers/-/transformers-2.17.2.tgz",
+      "integrity": "sha512-lZmHqzrVIkSvZdKZEx7IYY51TK0WDrC8eR0c5IMnBsO8di8are1zzw8BlLhyO2TklZKLN5UffNGs1IJwT6oOqQ==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@huggingface/jinja": "^0.2.2",
+        "onnxruntime-web": "1.14.0",
+        "sharp": "^0.32.0"
+      },
+      "optionalDependencies": {
+        "onnxruntime-node": "1.14.0"
+      }
+    },
     "node_modules/any-promise": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/any-promise/-/any-promise-1.3.0.tgz",
@@ -1081,6 +1174,117 @@
       "integrity": "sha512-8+9WqebbFzpX9OR+Wa6O29asIogeRMzcGtAINdpMHHyAg10f05aSFVBbcEqGf/PXw1EjAZ+q2/bEBg3DvurK3Q==",
       "license": "Python-2.0"
     },
+    "node_modules/bare-events": {
+      "version": "2.8.2",
+      "resolved": "https://registry.npmjs.org/bare-events/-/bare-events-2.8.2.tgz",
+      "integrity": "sha512-riJjyv1/mHLIPX4RwiK+oW9/4c3TEUeORHKefKAKnZ5kyslbN+HXowtbaVEqt4IMUB7OXlfixcs6gsFeo/jhiQ==",
+      "license": "Apache-2.0",
+      "peerDependencies": {
+        "bare-abort-controller": "*"
+      },
+      "peerDependenciesMeta": {
+        "bare-abort-controller": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/bare-fs": {
+      "version": "4.5.4",
+      "resolved": "https://registry.npmjs.org/bare-fs/-/bare-fs-4.5.4.tgz",
+      "integrity": "sha512-POK4oplfA7P7gqvetNmCs4CNtm9fNsx+IAh7jH7GgU0OJdge2rso0R20TNWVq6VoWcCvsTdlNDaleLHGaKx8CA==",
+      "license": "Apache-2.0",
+      "optional": true,
+      "dependencies": {
+        "bare-events": "^2.5.4",
+        "bare-path": "^3.0.0",
+        "bare-stream": "^2.6.4",
+        "bare-url": "^2.2.2",
+        "fast-fifo": "^1.3.2"
+      },
+      "engines": {
+        "bare": ">=1.16.0"
+      },
+      "peerDependencies": {
+        "bare-buffer": "*"
+      },
+      "peerDependenciesMeta": {
+        "bare-buffer": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/bare-os": {
+      "version": "3.6.2",
+      "resolved": "https://registry.npmjs.org/bare-os/-/bare-os-3.6.2.tgz",
+      "integrity": "sha512-T+V1+1srU2qYNBmJCXZkUY5vQ0B4FSlL3QDROnKQYOqeiQR8UbjNHlPa+TIbM4cuidiN9GaTaOZgSEgsvPbh5A==",
+      "license": "Apache-2.0",
+      "optional": true,
+      "engines": {
+        "bare": ">=1.14.0"
+      }
+    },
+    "node_modules/bare-path": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/bare-path/-/bare-path-3.0.0.tgz",
+      "integrity": "sha512-tyfW2cQcB5NN8Saijrhqn0Zh7AnFNsnczRcuWODH0eYAXBsJ5gVxAUuNr7tsHSC6IZ77cA0SitzT+s47kot8Mw==",
+      "license": "Apache-2.0",
+      "optional": true,
+      "dependencies": {
+        "bare-os": "^3.0.1"
+      }
+    },
+    "node_modules/bare-stream": {
+      "version": "2.7.0",
+      "resolved": "https://registry.npmjs.org/bare-stream/-/bare-stream-2.7.0.tgz",
+      "integrity": "sha512-oyXQNicV1y8nc2aKffH+BUHFRXmx6VrPzlnaEvMhram0nPBrKcEdcyBg5r08D0i8VxngHFAiVyn1QKXpSG0B8A==",
+      "license": "Apache-2.0",
+      "optional": true,
+      "dependencies": {
+        "streamx": "^2.21.0"
+      },
+      "peerDependencies": {
+        "bare-buffer": "*",
+        "bare-events": "*"
+      },
+      "peerDependenciesMeta": {
+        "bare-buffer": {
+          "optional": true
+        },
+        "bare-events": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/bare-url": {
+      "version": "2.3.2",
+      "resolved": "https://registry.npmjs.org/bare-url/-/bare-url-2.3.2.tgz",
+      "integrity": "sha512-ZMq4gd9ngV5aTMa5p9+UfY0b3skwhHELaDkhEHetMdX0LRkW9kzaym4oo/Eh+Ghm0CCDuMTsRIGM/ytUc1ZYmw==",
+      "license": "Apache-2.0",
+      "optional": true,
+      "dependencies": {
+        "bare-path": "^3.0.0"
+      }
+    },
+    "node_modules/base64-js": {
+      "version": "1.5.1",
+      "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.5.1.tgz",
+      "integrity": "sha512-AKpaYlHn8t4SVbOHCy+b5+KKgvR4vrsD8vbvrbiQJps7fKDTkjkDry6ji0rUJjC0kzbNePLwzxq8iypo41qeWA==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ],
+      "license": "MIT"
+    },
     "node_modules/binary-extensions": {
       "version": "2.3.0",
       "resolved": "https://registry.npmjs.org/binary-extensions/-/binary-extensions-2.3.0.tgz",
@@ -1094,6 +1298,17 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/bl": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/bl/-/bl-4.1.0.tgz",
+      "integrity": "sha512-1W07cM9gS6DcLperZfFSj+bWLtaPGSOHWhPiGzXmvVJbRLdG82sH/Kn8EtW1VqWVA54AKf2h5k5BbnIbwF3h6w==",
+      "license": "MIT",
+      "dependencies": {
+        "buffer": "^5.5.0",
+        "inherits": "^2.0.4",
+        "readable-stream": "^3.4.0"
+      }
+    },
     "node_modules/braces": {
       "version": "3.0.3",
       "resolved": "https://registry.npmjs.org/braces/-/braces-3.0.3.tgz",
@@ -1107,6 +1322,30 @@
         "node": ">=8"
       }
     },
+    "node_modules/buffer": {
+      "version": "5.7.1",
+      "resolved": "https://registry.npmjs.org/buffer/-/buffer-5.7.1.tgz",
+      "integrity": "sha512-EHcyIPBQ4BSGlvjB16k5KgAJ27CIsHY/2JBmCRReo48y9rQ3MaUzWX3KVlBa4U7MyX02HdVj0K7C3WaB3ju7FQ==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "base64-js": "^1.3.1",
+        "ieee754": "^1.1.13"
+      }
+    },
     "node_modules/busboy": {
       "version": "1.6.0",
       "resolved": "https://registry.npmjs.org/busboy/-/busboy-1.6.0.tgz",
@@ -1193,6 +1432,12 @@
         "url": "https://paulmillr.com/funding/"
       }
     },
+    "node_modules/chownr": {
+      "version": "1.1.4",
+      "resolved": "https://registry.npmjs.org/chownr/-/chownr-1.1.4.tgz",
+      "integrity": "sha512-jJ0bqzaylmJtVnNgzTeSOs8DPavpbYgEr/b0YL8/2GO3xJEhInFmhKMUnEJQjZumK7KXGFhUy89PrsJWlakBVg==",
+      "license": "ISC"
+    },
     "node_modules/citty": {
       "version": "0.1.6",
       "resolved": "https://registry.npmjs.org/citty/-/citty-0.1.6.tgz",
@@ -1209,6 +1454,47 @@
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       "license": "MIT"
     },
+    "node_modules/color": {
+      "version": "4.2.3",
+      "resolved": "https://registry.npmjs.org/color/-/color-4.2.3.tgz",
+      "integrity": "sha512-1rXeuUUiGGrykh+CeBdu5Ie7OJwinCgQY0bc7GCRxy5xVHy+moaqkpL/jqQq0MtQOeYcrqEz4abc5f0KtU7W4A==",
+      "license": "MIT",
+      "dependencies": {
+        "color-convert": "^2.0.1",
+        "color-string": "^1.9.0"
+      },
+      "engines": {
+        "node": ">=12.5.0"
+      }
+    },
+    "node_modules/color-convert": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
+      "integrity": "sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==",
+      "license": "MIT",
+      "dependencies": {
+        "color-name": "~1.1.4"
+      },
+      "engines": {
+        "node": ">=7.0.0"
+      }
+    },
+    "node_modules/color-name": {
+      "version": "1.1.4",
+      "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
+      "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==",
+      "license": "MIT"
+    },
+    "node_modules/color-string": {
+      "version": "1.9.1",
+      "resolved": "https://registry.npmjs.org/color-string/-/color-string-1.9.1.tgz",
+      "integrity": "sha512-shrVawQFojnZv6xM40anx4CkoDP+fZsw/ZerEMsW/pyzsRbElpsL/DBVW7q3ExxwusdNXI3lXpuhEZkzs8p5Eg==",
+      "license": "MIT",
+      "dependencies": {
+        "color-name": "^1.0.0",
+        "simple-swizzle": "^0.2.2"
+      }
+    },
     "node_modules/commander": {
       "version": "4.1.1",
       "resolved": "https://registry.npmjs.org/commander/-/commander-4.1.1.tgz",
@@ -1261,6 +1547,30 @@
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       "license": "MIT"
     },
+    "node_modules/decompress-response": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/decompress-response/-/decompress-response-6.0.0.tgz",
+      "integrity": "sha512-aW35yZM6Bb/4oJlZncMH2LCoZtJXTRxES17vE3hoRiowU2kWHaJKFkSBDnDR+cm9J+9QhXmREyIfv0pji9ejCQ==",
+      "license": "MIT",
+      "dependencies": {
+        "mimic-response": "^3.1.0"
+      },
+      "engines": {
+        "node": ">=10"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
+    "node_modules/deep-extend": {
+      "version": "0.6.0",
+      "resolved": "https://registry.npmjs.org/deep-extend/-/deep-extend-0.6.0.tgz",
+      "integrity": "sha512-LOHxIOaPYdHlJRtCQfDIVZtfw/ufM8+rVj649RIHzcm/vGwQRXFt6OPqIFWsm2XEMrNIEtWR64sY1LEKD2vAOA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=4.0.0"
+      }
+    },
     "node_modules/deepmerge-ts": {
       "version": "7.1.5",
       "resolved": "https://registry.npmjs.org/deepmerge-ts/-/deepmerge-ts-7.1.5.tgz",
@@ -1294,6 +1604,15 @@
       "devOptional": true,
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+        "rc": "cli.js"
+      }
+    },
     "node_modules/rc9": {
       "version": "2.1.2",
       "resolved": "https://registry.npmjs.org/rc9/-/rc9-2.1.2.tgz",
@@ -2532,6 +3167,20 @@
         "pify": "^2.3.0"
       }
     },
+    "node_modules/readable-stream": {
+      "version": "3.6.2",
+      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.6.2.tgz",
+      "integrity": "sha512-9u/sniCrY3D5WdsERHzHE4G2YCXqoG5FTHUiCC4SIbr6XcLZBY05ya9EKjYek9O5xOAwjGq+1JdGBAS7Q9ScoA==",
+      "license": "MIT",
+      "dependencies": {
+        "inherits": "^2.0.3",
+        "string_decoder": "^1.1.1",
+        "util-deprecate": "^1.0.1"
+      },
+      "engines": {
+        "node": ">= 6"
+      }
+    },
     "node_modules/readdirp": {
       "version": "4.1.2",
       "resolved": "https://registry.npmjs.org/readdirp/-/readdirp-4.1.2.tgz",
@@ -2608,6 +3257,26 @@
         "queue-microtask": "^1.2.2"
       }
     },
+    "node_modules/safe-buffer": {
+      "version": "5.2.1",
+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
+      "integrity": "sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ],
+      "license": "MIT"
+    },
     "node_modules/scheduler": {
       "version": "0.23.2",
       "resolved": "https://registry.npmjs.org/scheduler/-/scheduler-0.23.2.tgz",
@@ -2617,6 +3286,95 @@
         "loose-envify": "^1.1.0"
       }
     },
+    "node_modules/semver": {
+      "version": "7.7.4",
+      "resolved": "https://registry.npmjs.org/semver/-/semver-7.7.4.tgz",
+      "integrity": "sha512-vFKC2IEtQnVhpT78h1Yp8wzwrf8CM+MzKMHGJZfBtzhZNycRFnXsHk6E5TxIkkMsgNS7mdX3AGB7x2QM2di4lA==",
+      "license": "ISC",
+      "bin": {
+        "semver": "bin/semver.js"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
+    "node_modules/sharp": {
+      "version": "0.32.6",
+      "resolved": "https://registry.npmjs.org/sharp/-/sharp-0.32.6.tgz",
+      "integrity": "sha512-KyLTWwgcR9Oe4d9HwCwNM2l7+J0dUQwn/yf7S0EnTtb0eVS4RxO0eUSvxPtzT4F3SY+C4K6fqdv/DO27sJ/v/w==",
+      "hasInstallScript": true,
+      "license": "Apache-2.0",
+      "dependencies": {
+        "color": "^4.2.3",
+        "detect-libc": "^2.0.2",
+        "node-addon-api": "^6.1.0",
+        "prebuild-install": "^7.1.1",
+        "semver": "^7.5.4",
+        "simple-get": "^4.0.1",
+        "tar-fs": "^3.0.4",
+        "tunnel-agent": "^0.6.0"
+      },
+      "engines": {
+        "node": ">=14.15.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/libvips"
+      }
+    },
+    "node_modules/simple-concat": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/simple-concat/-/simple-concat-1.0.1.tgz",
+      "integrity": "sha512-cSFtAPtRhljv69IK0hTVZQ+OfE9nePi/rtJmw5UjHeVyVroEqJXP1sFztKUy1qU+xvz3u/sfYJLa947b7nAN2Q==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ],
+      "license": "MIT"
+    },
+    "node_modules/simple-get": {
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/simple-get/-/simple-get-4.0.1.tgz",
+      "integrity": "sha512-brv7p5WgH0jmQJr1ZDDfKDOSeWWg+OVypG99A/5vYGPqJ6pxiaHLy8nxtFjBA7oMa01ebA9gfh1uMCFqOuXxvA==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "decompress-response": "^6.0.0",
+        "once": "^1.3.1",
+        "simple-concat": "^1.0.0"
+      }
+    },
+    "node_modules/simple-swizzle": {
+      "version": "0.2.4",
+      "resolved": "https://registry.npmjs.org/simple-swizzle/-/simple-swizzle-0.2.4.tgz",
+      "integrity": "sha512-nAu1WFPQSMNr2Zn9PGSZK9AGn4t/y97lEm+MXTtUDwfP0ksAIX4nO+6ruD9Jwut4C49SB1Ws+fbXsm/yScWOHw==",
+      "license": "MIT",
+      "dependencies": {
+        "is-arrayish": "^0.3.1"
+      }
+    },
     "node_modules/source-map-js": {
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/source-map-js/-/source-map-js-1.2.1.tgz",
@@ -2634,6 +3392,35 @@
         "node": ">=10.0.0"
       }
     },
+    "node_modules/streamx": {
+      "version": "2.23.0",
+      "resolved": "https://registry.npmjs.org/streamx/-/streamx-2.23.0.tgz",
+      "integrity": "sha512-kn+e44esVfn2Fa/O0CPFcex27fjIL6MkVae0Mm6q+E6f0hWv578YCERbv+4m02cjxvDsPKLnmxral/rR6lBMAg==",
+      "license": "MIT",
+      "dependencies": {
+        "events-universal": "^1.0.0",
+        "fast-fifo": "^1.3.2",
+        "text-decoder": "^1.1.0"
+      }
+    },
+    "node_modules/string_decoder": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.3.0.tgz",
+      "integrity": "sha512-hkRX8U1WjJFd8LsDJ2yQ/wWWxaopEsABU1XfkM8A+j0+85JAGppt16cr1Whg6KIbb4okU6Mql6BOj+uup/wKeA==",
+      "license": "MIT",
+      "dependencies": {
+        "safe-buffer": "~5.2.0"
+      }
+    },
+    "node_modules/strip-json-comments": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/strip-json-comments/-/strip-json-comments-2.0.1.tgz",
+      "integrity": "sha512-4gB8na07fecVVkOI6Rs4e7T6NOTki5EmL7TUduTs6bu3EdnSycntVJ4re8kgZA+wx9IueI2Y11bfbgwtzuE0KQ==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/styled-jsx": {
       "version": "5.1.1",
       "resolved": "https://registry.npmjs.org/styled-jsx/-/styled-jsx-5.1.1.tgz",
@@ -2792,6 +3579,68 @@
         "node": ">=8.10.0"
       }
     },
+    "node_modules/tar-fs": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/tar-fs/-/tar-fs-3.1.1.tgz",
+      "integrity": "sha512-LZA0oaPOc2fVo82Txf3gw+AkEd38szODlptMYejQUhndHMLQ9M059uXR+AfS7DNo0NpINvSqDsvyaCrBVkptWg==",
+      "license": "MIT",
+      "dependencies": {
+        "pump": "^3.0.0",
+        "tar-stream": "^3.1.5"
+      },
+      "optionalDependencies": {
+        "bare-fs": "^4.0.1",
+        "bare-path": "^3.0.0"
+      }
+    },
+    "node_modules/tar-stream": {
+      "version": "3.1.7",
+      "resolved": "https://registry.npmjs.org/tar-stream/-/tar-stream-3.1.7.tgz",
+      "integrity": "sha512-qJj60CXt7IU1Ffyc3NJMjh6EkuCFej46zUqJ4J7pqYlThyd9bO0XBTmcOIhSzZJVWfsLks0+nle/j538YAW9RQ==",
+      "license": "MIT",
+      "dependencies": {
+        "b4a": "^1.6.4",
+        "fast-fifo": "^1.2.0",
+        "streamx": "^2.15.0"
+      }
+    },
+    "node_modules/tar-stream/node_modules/b4a": {
+      "version": "1.7.4",
+      "resolved": "https://registry.npmjs.org/b4a/-/b4a-1.7.4.tgz",
+      "integrity": "sha512-u20zJLDaSWpxaZ+zaAkEIB2dZZ1o+DF4T/MRbmsvGp9nletHOyiai19OzX1fF8xUBYsO1bPXxODvcd0978pnug==",
+      "license": "Apache-2.0",
+      "peerDependencies": {
+        "react-native-b4a": "*"
+      },
+      "peerDependenciesMeta": {
+        "react-native-b4a": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/text-decoder": {
+      "version": "1.2.6",
+      "resolved": "https://registry.npmjs.org/text-decoder/-/text-decoder-1.2.6.tgz",
+      "integrity": "sha512-27FeW5GQFDfw0FpwMQhMagB7BztOOlmjcSRi97t2oplhKVTZtp0DZbSegSaXS5IIC6mxMvBG4AR1Sgc6BX3CQg==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "b4a": "^1.6.4"
+      }
+    },
+    "node_modules/text-decoder/node_modules/b4a": {
+      "version": "1.7.4",
+      "resolved": "https://registry.npmjs.org/b4a/-/b4a-1.7.4.tgz",
+      "integrity": "sha512-u20zJLDaSWpxaZ+zaAkEIB2dZZ1o+DF4T/MRbmsvGp9nletHOyiai19OzX1fF8xUBYsO1bPXxODvcd0978pnug==",
+      "license": "Apache-2.0",
+      "peerDependencies": {
+        "react-native-b4a": "*"
+      },
+      "peerDependenciesMeta": {
+        "react-native-b4a": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/thenify": {
       "version": "3.3.1",
       "resolved": "https://registry.npmjs.org/thenify/-/thenify-3.3.1.tgz",
@@ -2899,6 +3748,18 @@
       "integrity": "sha512-oJFu94HQb+KVduSUQL7wnpmqnfmLsOA/nAh6b6EH0wCEoK0/mPeXU6c3wKDV83MkOuHPRHtSXKKU99IBazS/2w==",
       "license": "0BSD"
     },
+    "node_modules/tunnel-agent": {
+      "version": "0.6.0",
+      "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.6.0.tgz",
+      "integrity": "sha512-McnNiV1l8RYeY8tBgEpuodCC1mLUdbSN+CYBL7kJsJNInOP8UjDDEwdk6Mw60vdLLrr5NHKZhMAOSrR2NZuQ+w==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "safe-buffer": "^5.0.1"
+      },
+      "engines": {
+        "node": "*"
+      }
+    },
     "node_modules/typescript": {
       "version": "5.9.3",
       "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
@@ -2923,7 +3784,6 @@
       "version": "6.21.0",
       "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.21.0.tgz",
       "integrity": "sha512-iwDZqg0QAGrg9Rav5H4n0M64c3mkR59cJ6wQp+7C4nI0gsmExaedaYLNO44eT4AtBBwjbTiGPMlt2Md0T9H9JQ==",
-      "dev": true,
       "license": "MIT"
     },
     "node_modules/use-sync-external-store": {
@@ -2939,7 +3799,6 @@
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
       "integrity": "sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw==",
-      "dev": true,
       "license": "MIT"
     },
     "node_modules/w3c-keyname": {
@@ -2948,6 +3807,12 @@
       "integrity": "sha512-dpojBhNsCNN7T82Tm7k26A6G9ML3NkhDsnw9n/eoxSRlVBB4CEtIQ/KTCLI2Fwf3ataSXRhYFkQi3SlnFwPvPQ==",
       "license": "MIT"
     },
+    "node_modules/wrappy": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+      "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ==",
+      "license": "ISC"
+    },
     "node_modules/zustand": {
       "version": "5.0.11",
       "resolved": "https://registry.npmjs.org/zustand/-/zustand-5.0.11.tgz",
diff --git a/package.json b/package.json
index d094480..dc049fc 100644
--- a/package.json
+++ b/package.json
@@ -12,6 +12,7 @@
     "db:studio": "npx prisma studio"
   },
   "dependencies": {
+    "@encryptid/sdk": "file:../encryptid-sdk",
     "@prisma/client": "^6.19.2",
     "@tiptap/extension-code-block-lowlight": "^3.19.0",
     "@tiptap/extension-image": "^3.19.0",
@@ -22,7 +23,7 @@
     "@tiptap/pm": "^3.19.0",
     "@tiptap/react": "^3.19.0",
     "@tiptap/starter-kit": "^3.19.0",
-    "@encryptid/sdk": "file:../encryptid-sdk",
+    "@xenova/transformers": "^2.17.2",
     "dompurify": "^3.2.0",
     "lowlight": "^3.3.0",
     "marked": "^15.0.0",
diff --git a/src/components/VoiceRecorder.tsx b/src/components/VoiceRecorder.tsx
index 4678e81..5d9c22e 100644
--- a/src/components/VoiceRecorder.tsx
+++ b/src/components/VoiceRecorder.tsx
@@ -3,6 +3,13 @@
 import { useState, useRef, useCallback, useEffect } from 'react';
 import { authFetch } from '@/lib/authFetch';
 
+interface WhisperProgress {
+  status: 'checking' | 'downloading' | 'loading' | 'transcribing' | 'done' | 'error';
+  progress?: number;
+  file?: string;
+  message?: string;
+}
+
 interface Segment {
   id: number;
   text: string;
@@ -36,6 +43,7 @@ export function VoiceRecorder({ onResult, className }: VoiceRecorderProps) {
   const [error, setError] = useState<string | null>(null);
   const [audioUrl, setAudioUrl] = useState<string | null>(null);
   const [streaming, setStreaming] = useState(false);
+  const [offlineProgress, setOfflineProgress] = useState<WhisperProgress | null>(null);
 
   const mediaRecorderRef = useRef<MediaRecorder | null>(null);
   const audioContextRef = useRef<AudioContext | null>(null);
@@ -308,7 +316,7 @@ export function VoiceRecorder({ onResult, className }: VoiceRecorderProps) {
       }
 
       if (!transcript) {
-        // Fallback: batch transcription via API proxy
+        // Fallback 1: batch transcription via API proxy
         try {
           const transcribeForm = new FormData();
           transcribeForm.append('audio', blob, 'recording.webm');
@@ -323,7 +331,20 @@ export function VoiceRecorder({ onResult, className }: VoiceRecorderProps) {
             transcript = transcribeResult.text || '';
           }
         } catch {
-          console.warn('Batch transcription also failed');
+          console.warn('Batch transcription failed, trying offline...');
+        }
+      }
+
+      if (!transcript) {
+        // Fallback 2: offline Whisper via Transformers.js in browser
+        try {
+          setOfflineProgress({ status: 'loading', message: 'Loading offline model...' });
+          const { transcribeOffline } = await import('@/lib/whisperOffline');
+          transcript = await transcribeOffline(blob, (p) => setOfflineProgress(p));
+          setOfflineProgress(null);
+        } catch (offlineErr) {
+          console.warn('Offline transcription failed:', offlineErr);
+          setOfflineProgress(null);
         }
       }
 
@@ -391,10 +412,14 @@ export function VoiceRecorder({ onResult, className }: VoiceRecorderProps) {
                 <span className="text-2xl font-mono text-white">
                   {formatTime(elapsed)}
                 </span>
-                {streaming && (
+                {streaming ? (
                   <span className="text-xs text-green-400/70 font-medium tracking-wider">
                     LIVE
                   </span>
+                ) : (
+                  <span className="text-xs text-slate-500 font-medium tracking-wider">
+                    OFFLINE
+                  </span>
                 )}
               </div>
               <button
@@ -430,8 +455,17 @@ export function VoiceRecorder({ onResult, className }: VoiceRecorderProps) {
                 />
               </svg>
               <p className="text-sm text-slate-400">
-                Finalizing transcription...
+                {offlineProgress?.message || 'Finalizing transcription...'}
               </p>
+              {offlineProgress?.status === 'downloading' &&
+                offlineProgress.progress !== undefined && (
+                  <div className="w-48 h-1.5 bg-slate-700 rounded-full overflow-hidden">
+                    <div
+                      className="h-full bg-amber-400 rounded-full transition-all duration-300"
+                      style={{ width: `${offlineProgress.progress}%` }}
+                    />
+                  </div>
+                )}
             </div>
           )}
 
diff --git a/src/lib/whisperOffline.ts b/src/lib/whisperOffline.ts
new file mode 100644
index 0000000..60c8042
--- /dev/null
+++ b/src/lib/whisperOffline.ts
@@ -0,0 +1,120 @@
+/**
+ * Offline Whisper transcription using @xenova/transformers (Transformers.js v2).
+ * Dynamically imports the library to avoid SSR issues.
+ * Uses Xenova/whisper-tiny with quantized weights (~45MB download).
+ * Model is cached by the browser after first download.
+ */
+
+const MODEL_ID = 'Xenova/whisper-tiny';
+const CACHE_KEY = 'whisper-offline-cached';
+
+export interface WhisperProgress {
+  status: 'checking' | 'downloading' | 'loading' | 'transcribing' | 'done' | 'error';
+  progress?: number; // 0-100 for download progress
+  file?: string;
+  message?: string;
+}
+
+type ProgressCallback = (progress: WhisperProgress) => void;
+
+// Keep a singleton pipeline so we don't reload on subsequent calls
+let cachedPipeline: any = null;
+let loadingPromise: Promise<any> | null = null;
+
+/**
+ * Check if the Whisper model has been downloaded before.
+ * Note: this is a best-effort check via localStorage flag.
+ * The actual model cache is managed by Transformers.js via Cache API.
+ */
+export function isModelCached(): boolean {
+  if (typeof window === 'undefined') return false;
+  return localStorage.getItem(CACHE_KEY) === 'true';
+}
+
+/**
+ * Get or create the Whisper pipeline singleton.
+ */
+async function getPipeline(onProgress?: ProgressCallback): Promise<any> {
+  if (cachedPipeline) return cachedPipeline;
+
+  // Prevent multiple concurrent loads
+  if (loadingPromise) return loadingPromise;
+
+  loadingPromise = (async () => {
+    onProgress?.({ status: 'loading', message: 'Loading Whisper model...' });
+
+    const { pipeline, env } = await import('@xenova/transformers');
+
+    // Disable local model checks — always use browser cache / HF Hub
+    env.allowLocalModels = false;
+
+    const pipe = await pipeline('automatic-speech-recognition', MODEL_ID, {
+      quantized: true,
+      progress_callback: (p: any) => {
+        if (p.status === 'progress' && p.progress !== undefined) {
+          onProgress?.({
+            status: 'downloading',
+            progress: Math.round(p.progress),
+            file: p.file,
+            message: `Downloading model... ${Math.round(p.progress)}%`,
+          });
+        } else if (p.status === 'ready') {
+          localStorage.setItem(CACHE_KEY, 'true');
+          onProgress?.({ status: 'loading', message: 'Model loaded' });
+        }
+      },
+    });
+
+    cachedPipeline = pipe;
+    loadingPromise = null;
+    return pipe;
+  })();
+
+  return loadingPromise;
+}
+
+/**
+ * Decode an audio Blob to Float32Array at 16kHz mono.
+ */
+async function decodeAudioBlob(blob: Blob): Promise<Float32Array> {
+  const arrayBuffer = await blob.arrayBuffer();
+  const audioCtx = new AudioContext({ sampleRate: 16000 });
+  try {
+    const audioBuffer = await audioCtx.decodeAudioData(arrayBuffer);
+    return audioBuffer.getChannelData(0);
+  } finally {
+    await audioCtx.close();
+  }
+}
+
+/**
+ * Transcribe an audio Blob offline using Whisper in the browser.
+ *
+ * First call will download the model (~45MB). Subsequent calls use the cached model.
+ * Returns the transcribed text.
+ */
+export async function transcribeOffline(
+  audioBlob: Blob,
+  onProgress?: ProgressCallback
+): Promise<string> {
+  try {
+    const pipe = await getPipeline(onProgress);
+
+    onProgress?.({ status: 'transcribing', message: 'Transcribing audio...' });
+
+    const audioData = await decodeAudioBlob(audioBlob);
+
+    const result = await pipe(audioData, {
+      language: 'en',
+      return_timestamps: false,
+    });
+
+    const text = (result as any).text?.trim() || '';
+    onProgress?.({ status: 'done', message: 'Transcription complete' });
+    return text;
+  } catch (err) {
+    const message = err instanceof Error ? err.message : 'Transcription failed';
+    onProgress?.({ status: 'error', message });
+    throw err;
+  }
+}