GentoPost

Bluesky

Bluesky scheduler with on-device compression and official API posting

Post to Bluesky over the open AT Protocol with a 300-character limit and native link cards.

Connects through each network's official sign-in. We never ask for your passwords. · AT Protocol with an app password you generate in Bluesky settings — your main password is never stored.

Bluesky media and container specifications

Media, caption and container specifications GentoPost enforces for Bluesky
Caption limit300 characters
Recommended hashtags2
Preferred aspect ratio16:9
Video containerMP4
Video codecH.264 / AAC
Max video size50 MB
Max durationUp to 60 seconds
Video resolution1280 × 720 (16:9)
Frame rate24–30 fps
Image formatsJPEG, PNG
Max image size1 MB per image
Recommended image size1200 × 675

Bluesky character limit calculator

Paste a caption to see exactly how it lands against Bluesky's 300-character limit and 2 recommended hashtags. Nothing is uploaded — this runs entirely in your browser.

0 / 300 characters · 300 remaining

Ban-risk and rate-limit safety on Bluesky

Humanized posting delays

Bluesky's 1 MB image ceiling breaks most phone exports. GentoPost's on-device optimizer resizes before upload so posts do not fail silently.

Official API only

AT Protocol with an app password you generate in Bluesky settings — your main password is never stored. 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 Bluesky uploads finish fast and stay inside its size ceiling. Try the compressor.

Bluesky publishing questions

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

Can I publish to Bluesky and LinkedIn at the same time?

Yes. Write once, select both, and GentoPost sends a 300-character Bluesky post and a long-form LinkedIn update from the same draft.

Why do my Bluesky images fail elsewhere but work in GentoPost?

Bluesky caps images at roughly 1 MB. GentoPost resizes and re-encodes on your device before upload, so the post goes through the first time.

Other networks GentoPost publishes to

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