Turn EBU-STL subtitles into TTML. It is converted in your browser, so the file never leaves your device.
Drop EBU-STL files here
or choose from your computer paste with Ctrl V
from Photos or Files
Ready · several at once0 bytes uploaded, ever
Drop EBU-STL (STL, Tech 3264) files onto the box above, or click it to choose them. ToAny reads the file's contents to detect the type, so a wrong extension does not matter.
Press Convert. There is nothing else to set. The work happens in this tab.
Save the TTML, or download everything as one ZIP if you converted several files.
The EBU-STL to TTML converter is part of this page and runs inside your browser. Your subtitles are never sent to ToAny or to anyone else.
Nothing has to travel to a server and back, so the conversion starts the moment you press Convert, even on a slow connection.
No sign-up, no email address and no watermark. Add several files and download them together as a ZIP.
EBU STL is a binary file that web players and most consumer apps cannot read. TTML is accepted by broadcast and streaming platforms. EBU-STL is at home in subtitles delivered to European broadcasters; TTML is the usual choice for subtitles delivered to broadcasters and streaming services.
Of the styling, only italic, bold, underline and the position on screen (top, middle or bottom, left, centre or right) travel between formats; fonts, colours, outlines and effects do not. Only Latin-alphabet EBU STL files are read. Colours, boxes and double-height text are dropped; italics, underline, line breaks, position and justification are kept, and times are shifted back by the programme start the header declares. Positions are written as TTML regions and italic, bold and underline as styled spans; the result is a plain TTML file with no broadcast-specific profile.
EBU STL, defined in EBU Tech 3264, is the binary subtitle file of European broadcasters: a 1024-byte header followed by 128-byte blocks, each holding the in and out timecodes, position, justification and teletext-style text of one subtitle. It is usually named .stl, which is also the extension of 3D printing files, so ToAny tells them apart by the header inside.
Opens in Broadcast subtitling systems, Subtitle Edit, Premiere Pro and DaVinci Resolve
EBU-STL converterTTML is the W3C's XML subtitle format. Streaming services and broadcasters deliver captions in TTML profiles such as IMSC. It can describe regions, styles and timing precisely, but it is verbose, and many consumer players do not read it. DFXP is an earlier profile of it.
Opens in Broadcast and streaming systems, Apple and Netflix workflows, and some video players
TTML converter| EBU-STLEBU STL subtitles | TTMLTTML subtitles | |
|---|---|---|
| Stands for | EBU Subtitling data exchange format (STL) | Timed Text Markup Language |
| Type | Subtitles | Subtitles |
| Compression | None (binary) | None (XML text) |
| Introduced | 1991, by the European Broadcasting Union | 2010, by the W3C |
| Opens in | Broadcast subtitling systems, Subtitle Edit, Premiere Pro and DaVinci Resolve | Broadcast and streaming systems, Apple and Netflix workflows, and some video players |
| Best for | Subtitles delivered to European broadcasters | Subtitles delivered to broadcasters and streaming services |
| File extension | .ebustl | .ttml, .dfxp |
No. The EBU-STL to TTML conversion runs inside your browser, on your own phone or computer. The file is not sent to ToAny or to anyone else.
No further quality is lost: TTML stores the decoded audio exactly. The result is identical in content.
Yes. Add as many as you like, convert them together and download each result or all of them as one ZIP.
The steps are the same everywhere because ToAny runs in the web browser: open this page in a current version of Chrome, Edge, Safari or Firefox, add the EBU-STL file, press Convert and save the TTML. There is nothing to install.
Yes, but a subtitle file is small. Files up to 50 MB are accepted, far more than any real subtitle file. Beyond that the limit is your device's memory, since nothing is uploaded; a computer copes with large files better than a phone.