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How I built in-browser animated subtitles with Whisper on WebGPU (no upload)

This story is from 2026-10-07. It is preserved in the archive; the latest stories are on the live feed.

Most "auto captions" tools start the same way: upload your video, wait, download the result. I wanted the opposite for short vertical videos (TikTok, Reels, Shorts): the file never leaves the browser . Transcription, editing, rendering and export all run on the user's machine. The result is a small…

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  1. 2026-10-07 07:37 · DEV Community — AI
    How I built in-browser animated subtitles with Whisper on WebGPU (no upload)

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