About
Free online tools for subtitle conversion, editing, and timing. Convert between SRT, VTT, ASS, SSA, SBV, SUB, LRC, and JSON. No registration required.
Tools
- Format conversion — Convert between SRT, VTT, ASS, SSA, SBV, SUB, LRC, and JSON. Files up to 50MB.
- Subtitle editor — Edit text and start/end times per line in the browser.
- Subtitle sync — Apply a global time offset or adjust each line manually.
- Create subtitles — Build a new subtitle file from scratch and export in your chosen format.
How it works
Upload
Upload your subtitle file or create a new one. Drag and drop or click to browse.
Convert or edit
Choose the target format, adjust timing, or edit text as needed.
Download
Download the result. Use it in your video editor, YouTube, or any player.
Formats
SRT (SubRip) and VTT (WebVTT) are the most common; VTT is the web standard for HTML5 video. ASS/SSA support styling (fonts, colors). We also support SBV (YouTube), SUB (MicroDVD), LRC (lyrics), and JSON. For a detailed comparison, see the format comparison and tutorials.
Privacy & performance
Client-side processing
Conversion and editing run in your browser. Files are not uploaded to our servers or stored by us.
No account required
Use the tools without signing up. No watermarks, no usage limits for normal file sizes.
Contact
Feedback or questions: onlinesubtitleconverter@gmail.com. We typically respond within 24 hours.