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BlueSky Character Limit: How Long Can a Post Be?

June 19, 2026 - 6 min read

BlueSky posts have a 300-character limit. That limit is part of what makes the feed fast, but it also means long ideas need sharper editing or a thread.

Use the limit as a forcing function

A post that is too long usually has too much setup. Cut the throat-clearing first, then keep the strongest sentence and the clearest reason to care.

Use the free BlueSky character counter to check your draft before posting.

When to split into a thread

If cutting makes the idea less useful, turn it into a thread. Each post in the thread should still do one job, not just continue a giant paragraph.

Use the free BlueSky thread splitter when one idea needs more space.

FAQ

What is the BlueSky character limit?

BlueSky posts have a 300-character limit.

What should I do if a BlueSky post is too long?

Trim setup first. If the idea still needs more room, split it into a thread.

Does ONYX count BlueSky characters?

Yes. ONYX has a free public BlueSky character counter and a composer with post-length checks.

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