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Specs and limits

Bluesky specs and limits

Bluesky text is limited to 300 characters, counted by the characters a reader sees. This page lists every text, media and posting rule 1Post checks for Bluesky: counts, sizes, lengths, threads and the daily cap. Where Bluesky publishes a figure on its own page we cite it with the date we read it.

Also:Schedule Bluesky postsSocial media posting limits by networkSocial media posting limits table

Updated 2026-10-23

What 1Post checks for Bluesky

RuleWhat 1Post checks
Text limit300 characters, counted by the characters a reader sees
Media acceptedImages, Video
Images per post4
Videos per post1
Images and video togetherNot in one post
ThreadsYes, as a chain of replies
First commentYes
Posts per day, per connected account (1Post)100

These are the limits 1Post applies in the composer, so a post that passes is not refused for them when it is sent. A network can still refuse a post for reasons outside these rules, such as its content policies.

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Count characters the way each network does, split threads and preview posts. No account needed.

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Questions

How is Bluesky text counted?

Bluesky text is counted by the characters a reader sees. The character counter applies the same rule.

Where do these Bluesky limits come from?

They are the limits 1Post checks before a post is sent. Figures the network publishes on its own page are cited above with the date read; the rest are checks 1Post sets.

How often is this page updated?

When a network changes a rule or we read a newer figure, the page changes with it. The date at the top shows the last change.

Free character counter for every social networkHow to cross-post to Bluesky and Mastodon at once1Post vs Typefully: price, networks, API
Schedule Bluesky posts: formats, limits, setupSocial media posting limits by network, datedSocial media posting limits table, every network

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