Bluesky Character Counter — 300-Character Post Limit

Bluesky character limit

Bluesky caps a post at 300 characters — graphemes, not bytes, so an emoji or an accented letter counts as one character just like a plain letter. That’s slightly more room than X’s 280, but still tight, so this tool counts your post live and warns the moment you go over 300.

Why Bluesky counts graphemes

Unlike some networks that weight CJK characters or count code units, Bluesky measures user-perceived characters (grapheme clusters). A family emoji built from several code points counts as one, and Japanese or Chinese characters each count as one too. This counter uses the same grapheme counting, so the number you see matches what Bluesky shows.

Make 300 characters work

Open with your point rather than a wind-up, since the first words do the work in a fast feed. Links count toward the 300 characters (Bluesky doesn’t shorten them), so trim or use a link card. For longer thoughts, break them into a thread of connected posts rather than cramming everything into one.

Private and instant

Type or paste your post to see the character count and how many of the 300 remain. Everything runs in your browser, so nothing you type is uploaded. Trim until you’re comfortably under 300, then copy it across to Bluesky.