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Subtitle Converter
Convert between SRT, VTT, ASS, SSA, SBV, SUB, LRC, SAMI, TTML, JSON and CSV in bulk.
Free, no uploads, no sign-up. Runs 100% in your browser.
How Subtitle Converter works
A built-in subtitle engine reads each format into timed lines and writes them back out, keeping timing to the millisecond. Text encodings are detected automatically, with a picker for old files.
Input: SRT, VTT, ASS, SSA, SBV, SUB, LRC, SMI, TTML, DFXP, JSON, CSV, TXT. Output: SRT, VTT, ASS, SSA, SBV, SUB, LRC, SMI, TTML, JSON, CSV, TXT.
How to use Subtitle Converter
- Drop one or more subtitle files.
- Pick the output format.
- Fix the text encoding if letters look wrong.
- Download one file or a ZIP of all.
Tips
- MicroDVD SUB counts frames, so set the frame rate of your video.
- Use the remove styling switch for players that show tags as text.
Subtitle Converter FAQ
- Are my files uploaded?
- No. This tool runs entirely in your browser tab. Files are read from your disk into memory and the result is generated locally.
- Is it free? Are there limits or watermarks?
- Free and open source (MIT). There are no file-size caps, daily quotas, accounts or watermarks.
- Does it work offline?
- Yes, once the page (and any engine it needs) has loaded, it keeps working without a connection thanks to the service worker cache.
Related tools
- Subtitle Shift and Sync: Fix out-of-sync subtitles: shift all lines, correct frame rate drift, or line up two points.
- Subtitle Editor: Create and edit subtitles against a video preview. Set times from the player, split lines, save SRT, VTT or ASS.
- Subtitle Translator: Translate SRT, VTT or ASS files into 50+ languages on your device, keeping every timestamp.
- Extract Subtitles: Pull embedded subtitle tracks out of MKV, MP4 and MOV videos as SRT, VTT, ASS and more.