STL to SRT Converter Online
Convert EBU STL broadcast subtitle files to clean SRT — free. Accurate timing, readable text, formatting codes stripped. No account required and no watermarks — ever.
No account required · No forced watermark on exports
Drop your .stl file here
EBU STL subtitle files — a whole archive at once on the batch converter
- your-file.stl → your-file.srt — waiting…
Interface preview — conversion processing is not connected yet.
How to convert STL to SRT
- Upload your .stl file The binary EBU STL file is read directly — no companion files, no manual setup.
- Cues are extracted Text and in/out timecodes are pulled from the binary structure; open codes and alignment data are skipped for clean output.
- Download your .srt Standard numbered cues with timing intact, ready for any player or editor.
What is an STL file?
In subtitling, STL means the EBU STL subtitle format — the European Broadcasting Union's standard for subtitling data exchange, and a fixture of European broadcast delivery for decades. It is a binary format: each subtitle sits in the file with in/out timecodes plus formatting and alignment codes in a compact binary layout. That binary structure is why a text editor shows you garbage, why generic "open it as text" tricks fail, and why a purpose-built STL to SRT converter is the reliable path.
Not the file you meant? An .stl extension is also used by stereolithography 3D-printing files — those have nothing to do with subtitles and cannot be converted here.
What is SRT?
SRT (SubRip Text) is the most widely supported subtitle format: numbered cues, start and end timestamps, plain text. Practically every player, editor and platform reads it — which is why broadcast subtitle files usually end up converted into it for editing and reuse.
Why convert EBU STL to SRT?
- Editing — fix a typo or re-time a cue in any text editor instead of broadcast-grade tooling.
- Reuse — turn an archived broadcast subtitle track into captions for web players and current workflows.
- Translation round-trips — most translation tools and translators work from plain-text formats like SRT, not binary STL.
Converted, but the result still looks wrong?
Conversion extracts text and timing — it cannot repair overlapping cues, garbled characters or junk tags that were already in the source.
See what breaks subtitles — and how to fix it →STL to SRT FAQ
Will formatting and alignment codes survive?
No — and that is by design. SRT has no styling model. The converter extracts the text and the timing and skips open codes, so you get clean, readable cues instead of code fragments.
My .stl file is a 3D-printing file. Can I convert it?
No. Stereolithography files share the .stl extension but contain 3D geometry, not subtitles. This converter reads EBU STL subtitle files only.
Does the timing stay accurate?
Yes. In/out timecodes are carried over cue by cue, so the SRT lines up with the original broadcast timing.
Is it free? Do I need an account?
Free, and no account — conversion works without sign-up. Fair-use limits keep the service fast for everyone.
More free converters
Broadcast closed captions DFXP to SRT
Timed Text (XML) TTML to SRT
XML timed text profiles SBV to SRT
Plain-text cues Batch SRT Converter
Whole folders at once
Working with several of these formats? Read the broadcast subtitle formats guide — what each format is and where it fits.