- What size are Bluesky images?
- Bluesky shows a single image at the ratio you upload, unless it is taller than 1:2: the feed trims those, which catches a full-height phone screenshot. 1080 by 1350, a 4:5 ratio, works well in the feed, and square is a safe alternative. PostDecks lets you switch between them before posting.
- How many images can a Bluesky post have?
- Up to 10, since June 2026. Two to four show as a grid, and five or more as a swipe carousel. PostDecks previews both.
- How long can a Bluesky post be?
- A Bluesky post can be up to 300 characters and shows in full, with no more link. PostDecks counts your characters as you type.
- Is it free?
- Yes, preview and export are free with no account, and your content never leaves your browser. Sending it to a client to approve is free too, with a free account.