About - Free Online Subtitle Tools
AllSubConverter is a free browser-based subtitle toolkit with 110+ tools. Convert, edit, sync, and translate 11 subtitle formats. 100% private, no uploads.
AllSubConverter started with a simple idea: subtitle tools should be fast, private, and free. No signups, no uploads, no watermarks — just open your browser and get to work. Today we offer 110+ tools spanning 11 formats, used by subtitle professionals, translators, and language learners worldwide.
Our Core Values
Privacy First
Every conversion runs locally in your browser. Your files never touch our servers — there is no upload step to begin with.
No Sign-up
No account, no email, no credit card. Open the site, pick a tool, and start working immediately.
Lightning Fast
Built on an optimized client-side engine, conversions complete in seconds even for large files.
Always Free
All features are free during beta, with no usage limits or watermarks on output.