FCC Closed Caption Compliance Checker
Sanity-check closed captions against FCC quality benchmarks — completeness, timing/synchronicity and placement — for US broadcast and online video.
FCC caption quality (timing) — max 21 CPS, 32 chars/line, 3 lines, 0.5s min, 8s max
The FCC's caption-quality rules cover accuracy, synchronicity, completeness and placement rather than fixed CPS numbers, but CEA-608/708 captions practically run ≤ 32 characters per line and 3 lines. This tool checks timing/overlap, line length and reading speed — the mechanical half of FCC and CVAA compliance an automated pass can verify.
🔒 Subtitles are processed entirely in your browser — never uploaded.
Sanity-check closed captions against FCC quality benchmarks — completeness, timing/synchronicity and placement — for US broadcast and online video.
About FCC Closed Caption Compliance Checker
Sanity-check closed captions against FCC quality benchmarks — completeness, timing/synchronicity and placement — for US broadcast and online video. The FCC's caption-quality rules cover accuracy, synchronicity, completeness and placement rather than fixed CPS numbers, but CEA-608/708 captions practically run ≤ 32 characters per line and 3 lines. This tool checks timing/overlap, line length and reading speed — the mechanical half of FCC and CVAA compliance an automated pass can verify.
How to use FCC Closed Caption Compliance Checker
- 1Paste your subtitle file (SRT or WebVTT) into FCC Closed Caption Compliance 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 FCC Closed Caption Compliance Checker?
- ✓Runs entirely in your browser with instant, private results — no data leaves your device.
- ✓Built on a published reference: FCC Closed Captioning Quality rules (47 CFR §79.1).
- ✓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 FCC Closed Caption Compliance Checker do?+
Sanity-check closed captions against FCC quality benchmarks — completeness, timing/synchronicity and placement — for US broadcast and online video. The FCC's caption-quality rules cover accuracy, synchronicity, completeness and placement rather than fixed CPS numbers, but CEA-608/708 captions practically run ≤ 32 characters per line and 3 lines.
Is my data private?+
Yes. FCC Closed Caption Compliance Checker runs entirely in your browser — your inputs are never uploaded, stored or logged.
What standard or source is FCC Closed Caption Compliance Checker based on?+
It follows FCC Closed Captioning Quality rules (47 CFR §79.1); CEA-608 / CEA-708. Always confirm against the current official document, as specifications and rates can change.
Is FCC Closed Caption Compliance 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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