Free tool

Mastodon character counter

Check a Mastodon post against the 500-character limit as you type. Your text stays in this browser.

Your Mastodon post

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Mastodon character limit

A Mastodon post can have up to 500 characters. That is the limit on mastodon.social. Other Mastodon servers can set their own.

Every link counts as 23 characters however long it is, and a mention of someone on another server counts as just @user.

Image	Size	Notes
Avatar	400×400	Larger images are reduced to this size. WEBP, PNG, GIF or JPG, up to 2 MB.
Header	1500×500	Larger images are reduced to this size. WEBP, PNG, GIF or JPG, up to 2 MB.
Post image	Reduced to 8.3 megapixels	Up to 16 MB and four images per post. Your server’s limits may differ.

Also for Mastodon: the free Mastodon image resizer.

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What is the Mastodon character limit?

A Mastodon post can have up to 500 characters. That is the limit on mastodon.social. Other Mastodon servers can set their own.

Do emoji and links count on Mastodon?

Every link counts as 23 characters however long it is, and a mention of someone on another server counts as just @user.

Is my text saved anywhere?

No. The count runs in your browser. Nothing you type is sent or stored.

Is this the exact count the platform uses?

It follows the counting rule above and is a close planning estimate. Mastodon checks the final post itself.

Or check every network at once with the caption checker, and see all free tools.

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