Free toolComing soon

Bluesky post sizes 2026

  • Text, or up to 4 photos. No video yet.
  • Every number is what sprkly checks when you post.
  • Bluesky is in private testing. You can plan with these sizes now.

Updated

Sizes by post type

Text post

Size (pixels)
No media
Ratio
Not needed.
Max file
No file
Video length
Not video
Caption
300
Hashtags
Up to 30.

Photos

Size (pixels)
1080 x 1350
Ratio
Best 4:5. Any shape works.
Max file
Platform limit: 2 MBUpload in sprkly: up to 50 MB
Video length
Not video
Caption
300
Hashtags
Up to 30.

Width x height. Links and the API take files up to 50 MB.

If your file is off

  • Up to 4 photos. Extra photos are not posted.
  • sprkly shrinks each photo to under 976 KB before Bluesky gets it.
  • No video yet.

Let sprkly check it for you

Try sprkly free for 14 days, no card. After that, the Free plan gives you 3 accounts and 10 queued posts per account.

Start freeCheck one post now

Questions

What size should my Bluesky post be?

Photos: 1080 x 1350. Export at these sizes and nothing gets cut.

How long can my Bluesky video be?

Bluesky video is not supported in sprkly yet. Photos and text work today.

How long can my Bluesky caption be?

300 characters. sprkly counts as you type and turns red past the limit.

Other platforms