Convert SRT to ASS / SSA
Drop in a SRT file and get clean, valid ASS / SSA back in milliseconds. Runs entirely in your browser — your file never uploads.
Input
SRT file
Subtitle file
Output
ASS / SSA file
Spec-compliant
- Runs 100% in your browser — nothing uploads
- No file size limits
See it in action
SRT in, ASS / SSA out
What you put in → what you get back
SRT input
What you provide
1 00:00:12,340 --> 00:00:15,780 Hello, it's me 2 00:00:15,780 --> 00:00:19,200 I was wondering if after all 3 00:00:19,200 --> 00:00:22,840 these years you'd like to meet
ASS / SSA output
What you receive
[Script Info] ScriptType: v4.00+ [V4+ Styles] Format: Name, Fontname, Fontsize, … Style: Default,Arial,24,&H00FFFFFF,… [Events] Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text Dialogue: 0,0:00:12.34,0:00:15.78,Default,,0,0,0,,Hello, it's me Dialogue: 0,0:00:15.78,0:00:19.20,Default,,0,0,0,,I was wondering if after all
Step-by-step guide
How to use this tool
- 01
Paste or drop SRT
Any valid SRT file works — paste the text or drag the file in.
- 02
Hit Convert
We parse the SRT structure and emit valid ASS / SSA.
- 03
Verify the output
Compare side-by-side. Use the Switch Direction button to round-trip and sanity-check.
- 04
Download ASS / SSA
Filename auto-suffixed with .ass so it's ready to drop into your editor.
Key features
Why use this tool
100% in your browser
We never see your file. Conversion runs as JavaScript in the page you're reading.
Round-trip safe
Convert SRT → ASS / SSA → SRT and you should get the same content back, line-for-line.
Spec-compliant output
ASS / SSA files validate against the ASS / SSA reference parsers.
Bidirectional
Reverse direction (ASS / SSA → SRT) is one click away — no need to bookmark a different page.
Common use cases
Who this tool is for
From SRT
YouTube, VLC, MPV, Premiere Pro, Final Cut Pro.
To ASS / SSA
Aegisub, MPC-HC, MPV with libass, OBS Studio.
Localization workflows
Translate once in your preferred format, ship to every platform.
Format mismatch fixes
Got a file in the wrong format? Convert in seconds, no editor required.
Questions answered
Frequently asked questions
Need to go the other way?
ASS / SSA → SRT works the same way — we even have a button to switch direction.