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A subtitle file is text, and the programs that make it write about themselves in the same text. An ASS or SSA file has a script header with a title, who wrote, translated, edited and timed it, and notes; editors such as Aegisub add comments and a project section that stores the paths of the video and audio the subtitles were made from, which can include a user name. A WebVTT file can carry a title after its signature and NOTE blocks. A subtitle metadata remover deletes those and leaves every spoken line and its timing exactly as it was. Drop an .ass, .ssa, .vtt or .srt file in the box above to see what it holds.
What a subtitle file remembers
| Where | What is stored | Example |
|---|---|---|
| Script header (ASS, SSA) | Title, Original Script, Original Translation, Original Editing, Original Timing, Script Updated By, Update Details | Original Script: Jane Doe |
| Editor comments | Lines starting with a semicolon | ; Script generated by Aegisub 3.2.2 |
| Project section (Aegisub) | Video file, audio file, cursor and zoom positions | Video File: C:\Users\jane\Videos\ep4.mkv |
| WebVTT header and notes | A title after WEBVTT and NOTE blocks | NOTE written by Sam on her laptop |
Where the details come from
- Subtitle editors write their own name and project paths.
- Fan and release groups put credits in the script header.
- Translators and timers add notes for each other.
What the remover deletes, and what it keeps
| Removed | Kept |
|---|---|
| Title and the author, translator, editor and timer names in the header | Every subtitle line and its timing |
| Editor comment lines | Styles, fonts and positions |
| The Aegisub project section with video and audio paths | Embedded fonts and graphics |
| WebVTT titles, header notes and NOTE blocks | Comment events that are part of the script |
How to remove metadata from a subtitle file
- Drop your subtitle files in the box at the top of the page, or choose them from your device. You can add many files at once.
- Press the clean button. Each file shows what was found and removed.
- Read the report. Anything that could still identify someone is listed as remaining, so nothing is hidden from you.
- Download the clean copy. One file downloads as it is; several come as one ZIP.
Is it safe to clean a subtitle file online?
Yes. Subtitle files are cleaned entirely in your browser: the file is read, rewritten and handed back as a download without leaving your device. You can confirm it by opening the network tab of your browser while you clean a file, where no upload appears. If you use the API or the MCP server, the file is processed on our server, held only for the length of the request, and deleted within minutes.
Frequently asked questions
Will my subtitles still play?
Yes. Only header fields, comments and project data are removed. The dialogue, timing and styles are copied as they are.
Does an SRT file have metadata?
Not in the format itself. The tool checks that it is a valid SRT and tells you that nothing was found.
Are subtitles inside an MKV or MP4 cleaned?
No, only separate subtitle files. Use the video remover for the video container.
Can I clean subtitle files with the API?
Yes. Send the file to POST /api/v1/clean/document with your API key and its name in the X-Filename header. It returns the clean file and reports what was removed in the response headers. The MCP server does the same for AI assistants.
How many files can I clean?
Guests and free accounts have a daily allowance and a file-size limit, shown above the drop box. Paid plans raise both. Documents, images, PDFs and audio share one daily allowance.