Subtitle converter

Convert subtitles between SRT, WebVTT and ASS — built for video editors and caption workflows.

Runs in your browser

No files needed100% local · no upload

Input

Mode

Output

Guide

How to convert subtitle converter

Pick a direction
SRT for editors and most platforms, WebVTT for HTML5 video, ASS for styled subtitle effects.
Paste the subtitle file
Paste the full file contents — timing lines, cue numbers and multi-line text are all parsed.
Copy the converted result
Save it with the matching extension (.srt, .vtt or .ass) next to your video.

Frequently asked questions

What is the difference between SRT, VTT and ASS?

SRT is the simplest and most widely accepted. WebVTT is the web standard used by HTML5 video players and adds styling support. ASS is the most capable — positioning, fonts and karaoke effects — and is used by fansub and video editing tools.

Are the timings preserved?

Yes — timings are parsed to milliseconds and re-serialised exactly, including hours and centisecond precision for ASS.

Is my subtitle file uploaded?

No — parsing and conversion run entirely in your browser. Nothing is sent anywhere.

Why did my ASS file lose its styling?

Converting ASS to SRT or VTT keeps the text and timing but discards style definitions, since those formats have no equivalent fields. Keep the ASS original if you need the full styling.

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