✳ CAPTIONS · TIKTOK
WebVTT captions for TikTok
Caption QA + TikTok compatibility. Drop a WebVTT file to validate it against TikTok's caption rules. Stays on your device.
TikTok · may accept WebVTT (verify with the platform) · post-text limit 2,200 characters
Sidecar .vtt file with timestamps; required by HTML5 <track>.
Source: https://developers.tiktok.com/docs/en/content-posting-api-media-transfer-guide · Verified 2026-09-12
What this checks
- Format auto-detection (SRT vs WebVTT) and parse errors
- Per-cue reading speed (warnings above 21 chars/sec)
- Negative timestamps and zero-duration cues
- Cue overlap and ordering
- TikTok post-text character limit (2,200)
After validating, create all platform versions in the Creator: /tools/pack
Automate this in Koldflux