Convertisseur de Sous-titres SRT vers VTT, ASS, TXT Gratuit
Convertissez entre SRT, VTT, ASS et TXT. Instantané, côté client, sans upload.
Who uses the Subtitle Converter
- Content creators preparing footage for YouTube, Instagram, TikTok, or X who need a quick fix without installing software.
- Teachers, marketers, and students who want a no-learning-curve way to handle everyday video tasks.
- Developers and editors who need a predictable FFmpeg-backed result on any machine.
Supported formats
- Input: MP4, MOV, WebM, MKV, AVI, FLV, and most other common video containers.
- Output: MP4 (H.264 / AAC) by default — the format that plays everywhere, including iOS, Android, and social networks.
Why choose this subtitle converter
- 100% private — your files never leave your browser, so nothing is uploaded to our servers.
- No watermark, no signup, no hidden limits. Completely free to use, for any purpose.
- Runs on top of FFmpeg compiled to WebAssembly, giving you the same results professionals get in the terminal.
- Works on desktop and mobile, on any OS — only a modern browser is required.
Questions Fréquentes
Which subtitle formats can I convert between?
SRT (SubRip), VTT (WebVTT), ASS/SSA (Advanced Substation Alpha), and plain TXT. Any direction — SRT→VTT, VTT→ASS, ASS→SRT, etc. TXT is one-way friendly (timing is generated as 2-second blocks if you need it).
Does it preserve styling when converting from ASS?
ASS styling (custom fonts, colors, outlines) is stripped when converting to SRT/VTT because those formats do not support styling. Converting ASS → ASS (for cleanup) preserves the text content but resets to a default style.
Why convert SRT to VTT?
VTT is the web-native format used by HTML5 <track> elements. Browsers, Vimeo, and many video players require VTT instead of SRT. The difference is minor (VTT uses "." instead of "," for milliseconds) but it matters for compatibility.
Is this secure for sensitive transcripts?
Yes. Conversion happens entirely in your browser — nothing is uploaded. Open DevTools → Network tab while converting to verify.