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Dev.to
7/15/2026
I built a free set of subtitle tools that run entirely in your browser (no upload)

I built a free set of subtitle tools that run entirely in your browser (no upload)

Short summary

A developer built Lazyblink, a free browser-based subtitle toolkit that converts SRT/VTT files, extracts clean transcripts, and shifts caption timing — all client-side with no file uploads. The tools run as a static site with zero backend, keeping subtitle files on the user's device. It addresses privacy concerns for unreleased or client video content.

  • •Free browser-based subtitle tools: SRT↔VTT conversion, transcript extraction, timing shifter
  • •100% client-side JavaScript, no file upload, no signup, no watermark
  • •Useful for video professionals working with sensitive or unreleased content

Generated with AI, which can make mistakes.

#ai-tools#open-source
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