Mastodon character counter
Free Mastodon character counter. Paste your text to see characters, words and how much room is left under the 500-character post limit.
Mastodon limits at a glance
| Field | Limit | Note |
|---|---|---|
| Post | 500 | Instance default; some servers allow more |
| Display name | 30 | |
| Bio | 500 | |
| Alt text | 1,500 | |
| Attachments per post | 4 | count |
Limits as published by the network at the time of writing; see the official help pages for changes.
How to use the Mastodon character counter
- Pick the field you are writing (post, bio, headline).
- Paste or type your text. The bar turns amber near the limit and red over it.
- Check words, hashtags and mentions. Hashtags are how posts get discovered across instances; 2–4 with CamelCase for screen readers.
- Copy the text, or open it in a scheduler to preview it on every network at once.
Frequently asked questions
How many characters can a Mastodon post have?+
500 characters (Instance default; some servers allow more). This counter uses the same per-character counting most networks use, where an emoji counts as one character.
Do emojis count as one character?+
Most networks count one visible emoji as one character, although a few complex emoji (skin tones, flags) can count as two. This tool counts visible characters and shows the emoji count separately.
Do links count towards the limit?+
On Mastodon links count at their full length. Use a short link or the UTM builder to keep them tidy.
Does this tool store my text?+
No. Everything runs in your browser; nothing is sent to a server.
Schedule Mastodon posts from one calendar
Postfree checks every limit on this page automatically, previews each network, and publishes on time. Free plan, no credit card.