ASS to SRT converter
Drop an .ass or .ssa file and download a clean SRT that any player reads. Line breaks, italics and bold are kept; positioning and effects codes are removed.
workbench · no file open
.srt .vtt .ass .ssa .sbv
Drop a subtitle file here
Drop the video too to preview the lines over it and to set each start and end by its sound. Nothing is uploaded. No subtitle yet? Make one from the audio with transcribe.tools.
Formats it reads and writes
| Format | Timecode | Kept when saved here |
|---|---|---|
| SRT.srt | 00:01:23,450 | Italic, bold, underline, font tags |
| WebVTT.vtt | 00:01:23.450 | Italic, bold, underline |
| ASS.ass .ssa | 0:01:23.45 | Styles, actors, {\an8} and {\pos} when the file was ASS |
| SBV.sbv | 0:01:23.450 | Text only |
Reading speed and timing limits
The presets of the checker: Netflix English. Every number can be changed.
| Limit | Adult | Children’s |
|---|---|---|
| Characters per line | 42 | 42 |
| Lines per subtitle | 2 | 2 |
| Reading speed, CPS | 20 | 17 |
| Shortest on screen | 833 ms | 833 ms |
| Longest on screen | 7 s | 7 s |
| Gap between lines (2 frames at 24 fps) | 83 ms | 83 ms |
Source: Netflix Partner Help Center, English (USA) Timed Text Style Guide; Netflix Partner Help Center, Timed Text Style Guide: General Requirements; Netflix Partner Help Center, Timed Text Style Guide: Subtitle Timing Guidelines, opened .
Check a file against these limitsHow to use the ass to srt
- 00:01
Open the file
The format is read from the content, so a misnamed file still opens correctly.
- 00:02
Check the output
The panel shows the start of the converted file before you download it.
- 00:03
Download
Saved in UTF-8 with the extension and timestamps of the new format.
Why convert ASS to SRT?
ASS (Advanced SubStation Alpha) is the format of fansubs and karaoke: it carries fonts, colours, positions and effects. Many TVs, set-top boxes, phones and video sites only read SRT, or show ASS files with the raw codes on screen. SRT is the plain, universal version: text and times.
What is kept and what is lost?
The text, every start and end time (ASS counts hundredths of a second, which SRT writes exactly), forced line breaks (\N), hard spaces (\h), and italic, bold and underline, which become <i>, <b> and <u>. Positions ({\pos}), alignment ({\an8}), colours, fades, karaoke timing and drawings have no SRT equivalent and are removed. Lines are written in time order, whatever their order in the ASS file, and numbered from 1, as SRT expects.
What about signs and songs on separate styles?
ASS files often have a style for dialogue and others for on-screen signs or song lyrics. In SRT they all become ordinary lines. If you want only the dialogue, delete the sign lines in the list before downloading, or use the Clean panel to remove music lines. Sign lines are often marked with {\an8} to sit at the top of the screen; in SRT they would sit at the bottom with the dialogue, which is another reason to check them before you save.
Can I edit the ASS file and keep it as ASS?
Yes. Choose ASS as the output and the script info, styles, the style and actor of each line, and override codes are written back as they were, with your edits to the text and times.
Questions
Does it read SSA files too?
Yes. SSA is the older version of the same format; the editor reads the Format line of the Events section, so the field order of either version is understood.
Why are there two lines at the same time in my SRT?
ASS can show a dialogue line and a sign at once. They stay as two SRT lines with overlapping times, which most players show stacked. The Fix panel lists overlaps if you want to merge or move them.
Will the SRT show the right characters?
Yes. ASS files are read as UTF-8 or UTF-16, or as Windows-1252 for older files, and the SRT is written in UTF-8.
Can I convert ASS to VTT instead?
Yes. Pick VTT next to the download button. The same rules apply: formatting tags that WebVTT supports are kept, styling codes are removed.
Can I check line length after converting?
Yes. ASS lines are often long because the style wraps them on screen; the line length checker finds lines over your limit and can rewrap them onto two lines.
More subtitle tools
- Subtitle editorEdit lines over your video, then save as SRT, VTT, ASS or SBV.
- SRT to VTTWebVTT for HTML5 players, with header and timestamps rewritten.
- Shift timingMove every line earlier or later, or only from a point on.
- Fix syncTwo-point resync and frame-rate change for drifting subtitles.
- Merge and splitJoin two parts, combine two languages, or cut a file in two.
- Line length and CPSCharacters per line, reading speed and timing against your limits.
Sources
- ASS Override Tags
What \i, \b and \u (italic, bold, underline), \N (forced line break), \h (hard space) and \an (alignment) do inside an ASS line.
Aegisub documentation. Opened on .
Style limits differ between broadcasters, languages and clients; the presets are one published guide, and every limit can be changed. Your files never leave your browser.