A practical video format for TikTok: MP4 and H.264
For TikTok’s Content Posting API, MP4 with H.264 is the documented recommendation. AAC is this tool’s audio export choice, not an API requirement established by that source. Native composers may differ; no format guarantees acceptance.
Fix it
- Convert it to MP4
This browser converter accepts files up to 100 MB, re-encodes them and can lose quality. Convert a copy from the original and preview the generated video and audio before uploading it yourself.
Convert to MP4
Platform reference and evidence
These reference values have partial source coverage. Ratios and dimensions are editing guidance; account and upload-surface limits can differ. Approximate or unknown values do not certify eligibility.
- Platform
- TikTok
- Editing ratio
- 9:16
- Max length
- up to 10 minutes via the Content Posting API; account limits vary
- Max file size
- 4 GB via the Content Posting API
Duration and size: reference and limitations. Approximate values still need confirmation in your composer.
The API allows uploads up to 10 minutes, but the account-specific publishing limit may be shorter. Native app and web limits can differ.
Format reference scope: Content Posting API; native app/web acceptance may differ. Source checked 2026-09-12; this does not verify every reference field. TikTok Media Transfer Guide
Why this choice
Documented MP4 and H.264 recommendation; AAC is our export setting.
Content Posting API; account limits and native upload surfaces vary. Official reference
Prepare a copy in Koldflux, review its output and check the current destination requirements before publishing.
Automate this in Koldflux