Subtitle Converter Online Free — PrivaTools

TL;DR: Paste or upload an SRT/VTT/ASS subtitle file and convert it to any of the other formats — pure-browser.

Convert subtitle files online for free — translate between SRT, VTT, and ASS formats entirely in your browser. Fix timecodes and re-encoding instantly.

Using Subtitle Converter doesn't require an account, an email address, or a paid plan. Your file is held in temp memory only for the duration of processing, then permanently unlinked. No watermarks, no upsells, no behavioural tracking.

How to Use Subtitle Converter

1. Upload an SRT / VTT / ASS subtitle file — Auto-detects format from extension and content.
2. Choose target format — SRT (universal). VTT (web video). ASS (advanced styling).
3. Download the converted subtitles — Runs entirely in your browser.

Frequently Asked Questions

What's the difference between SRT and VTT?

SRT: simplest. VTT (WebVTT): used by HTML5 , supports styling. ASS (Advanced SubStation Alpha): rich styling like karaoke colors, but less compatible.

Will styling carry over?

SRT → VTT: yes. VTT → SRT: styling is stripped (SRT has no style support). ASS → SRT: styling lost; text and timing preserved.

Is my subtitle file uploaded?

No — pure browser conversion.

Last reviewed 2026-05-01 by the PrivaTools maintainers. Source code on GitHub (MIT-licensed, self-hostable).

Related Tools

• Image Color Palette
• Pixelate / Blur Image
• Rotate Image
• Flip Image
• Mute Video
• Video Speed Changer
• Audio Trimmer
• Reverse Video

Working with PDFs too? Try our Merge PDF, Compress PDF, PDF to Word, or all 175+ tools.