EBU Teletext Subtitle Checker
Validate teletext-style broadcast subtitles to the classic EBU constraint: ≤ 37 characters per line, up to 2 rows, conservative reading speed.
EBU teletext subtitling — max 15 CPS, 37 chars/line, 2 lines, 1s min, 7s max
Teletext and EBU-STL broadcast subtitling is hard-limited to 37 characters per row (the teletext grid) with a conservative reading speed for living-room viewing. Even in a file-based world, many European broadcasters still spec to these numbers — this validates line length and timing against them.
🔒 Subtitles are processed entirely in your browser — never uploaded.
Validate teletext-style broadcast subtitles to the classic EBU constraint: ≤ 37 characters per line, up to 2 rows, conservative reading speed.
About EBU Teletext Subtitle Checker
Validate teletext-style broadcast subtitles to the classic EBU constraint: ≤ 37 characters per line, up to 2 rows, conservative reading speed. Teletext and EBU-STL broadcast subtitling is hard-limited to 37 characters per row (the teletext grid) with a conservative reading speed for living-room viewing. Even in a file-based world, many European broadcasters still spec to these numbers — this validates line length and timing against them.
How to use EBU Teletext Subtitle Checker
- 1Paste your subtitle file (SRT or WebVTT) into EBU Teletext Subtitle Checker, or open it from disk.
- 2The tool parses every cue and processes it in your browser.
- 3Review the result — flagged issues, converted output or statistics.
- 4Copy or download the corrected/converted file.
Why use EBU Teletext Subtitle Checker?
- ✓Runs entirely in your browser with instant, private results — no data leaves your device.
- ✓Built on a published reference: EBU Tech 3264 (STL); EBU Tech 3360.
- ✓100% free with no sign-up, no watermark and no usage limits.
- ✓Works on any device — desktop, tablet or phone — and keeps working offline once loaded.
Frequently asked questions
What does EBU Teletext Subtitle Checker do?+
Validate teletext-style broadcast subtitles to the classic EBU constraint: ≤ 37 characters per line, up to 2 rows, conservative reading speed. Teletext and EBU-STL broadcast subtitling is hard-limited to 37 characters per row (the teletext grid) with a conservative reading speed for living-room viewing.
Is my data private?+
Yes. EBU Teletext Subtitle Checker runs entirely in your browser — your inputs are never uploaded, stored or logged.
What standard or source is EBU Teletext Subtitle Checker based on?+
It follows EBU Tech 3264 (STL); EBU Tech 3360. Always confirm against the current official document, as specifications and rates can change.
Is EBU Teletext Subtitle Checker free to use?+
Yes — it is completely free with no account, no sign-up and no usage limits. There is no watermark and no paywall.
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