X scheduler with on-device compression and official API posting

Ship 280-character posts to X with a live counter, media validation and OAuth 2.0 compliance built in.

Connects through each network's official sign-in. We never ask for your passwords. · X API v2 via official OAuth 2.0 with PKCE (tweet.write).

X media and container specifications

Media, caption and container specifications GentoPost enforces for X
Caption limit	280 characters
Recommended hashtags	2
Preferred aspect ratio	16:9
Video container	MP4
Video codec	H.264 / AAC
Max video size	512 MB
Max duration	Up to 140 seconds on standard accounts
Video resolution	1280 × 720 (16:9)
Frame rate	Up to 60 fps
Image formats	JPEG, PNG, GIF, WebP
Max image size	5 MB
Recommended image size	1600 × 900

X character limit calculator

Paste a caption to see exactly how it lands against X's 280-character limit and 2 recommended hashtags. Nothing is uploaded — this runs entirely in your browser.

0 / 280 characters · 280 remaining

Ban-risk and rate-limit safety on X

Humanized posting delays

X aggressively rate-limits automated posting. GentoPost applies a randomized delay between posts rather than firing a batch in one second.

Official API only

X API v2 via official OAuth 2.0 with PKCE (tweet.write). No scraping, no session cookies, no unofficial endpoints — the practices that actually get accounts suspended.

Compression before upload

WebCodecs re-encodes on your device — a 100 MB clip becomes roughly 12 MB — so X uploads finish fast and stay inside its size ceiling. Try the compressor.

X publishing questions

Specifics about limits, media and compliance when GentoPost posts to X.

How does GentoPost handle the 280-character limit on X?

The composer counts every character live, shortens the cross-posted variant automatically and blocks publishing if the final text still overruns.

Will scheduled posting get my X account rate-limited?

GentoPost uses the official X API v2 with OAuth 2.0 and humanized jitter intervals, so posting stays inside published rate limits.

Other networks GentoPost publishes to

Ready to publish? See plans and start the 3-day trial.