OpenAnyFile
What is a .ssa file?
SubStation Alpha is a subtitle format developed by Kotus, first released in 1996. It is usually created by SubStation Alpha, older fansub tools.
The predecessor of ASS: styled, positioned subtitles in an INI-like text file.
File details
| Full name | SubStation Alpha |
|---|---|
| Category | Subtitles |
| MIME type | text/x-ssa |
| Signature (magic bytes) | 5B 53 63 72 69 70 74 20 49 6E 66 6F 5D ([Script Info]) |
| Developer | Kotus |
| Introduced | 1996 |
| Opens with | Text reader |
| Uploaded? | No — read locally in your browser |
How to open a .ssa file
OpenAnyFile routes .ssa files to its text reader, which shows the full text.
- Drop your .ssa file on the box above, click it to choose the file, or paste it with Ctrl+V.
- The real format is detected from the file's first bytes — not just its name.
- The file opens in the text reader.
- Use fullscreen for a closer look, check its checksums, or download it back unchanged.
What works — and what does not
Works
Viewing and inspecting: the full text. Size, type, signature and checksums are always shown.
Does not work
Editing and saving back. OpenAnyFile is a viewer, not an editor — for changes you still need the original app.
Is it safe to open a .ssa file online?
Here, yes — because nothing is uploaded. Most "online viewers" send your file to their server. OpenAnyFile reads it with your browser's File API and decodes it on your own device, so there is no copy anywhere else. You can check: open your browser's network tab while opening a file — no upload appears.
Questions about .ssa files
Can I open a .ssa file without installing software?
Yes. OpenAnyFile opens .ssa files in your browser using its text reader. You get the full text, with nothing installed and no account.
How do I know a file is really a .ssa file?
Check its first bytes instead of its name. A genuine SSA file begins with 5B 53 63 72 69 70 74 20 49 6E 66 6F 5D ([Script Info]). OpenAnyFile shows the detected type, so a renamed file is easy to spot.
Is my .ssa file uploaded anywhere?
No. The file is read locally by your browser and never sent to a server — it even works offline once the page has loaded.
Does it work on phones?
Yes — on Android and iPhone, in any modern browser. You can also install OpenAnyFile as an app.
Related formats
Other formats from the same family:
Format facts checked and page updated on September 25, 2026.