Reference tables for TikTok and Meta publishing
API rate limits, caption limits, video specs and ad specs — each figure with the official source it came from and the date it was read. Nothing here is written from memory: every number carries a link to the documentation it was taken from, and the date that page was read.
- TikTok API rate limits, per endpointEvery published TikTok API rate limit, endpoint by endpoint, with the sliding window, the 429 error code, and what each one means across several accounts.Last checked
- TikTok caption and hashtag limitsThe TikTok caption limit is 2,200 UTF-16 runes, hashtags included. What a rune is, why emoji cost two, and what the API rejects. Read from the official docs.Last checked
- TikTok video specs for API publishingAccepted formats, chunked upload rules and the per-creator duration limit for publishing through the TikTok Content Posting API. Official docs, Sep 2026.Last checked
- Meta video ad specs, Facebook feedFile type, ratio, resolution, duration, file size and text limits for a Facebook feed video ad, read from Meta’s own ads guide on 22 September 2026.Last checked