Free tool

Slack character counter

Check a Slack message against the 4,000-character limit as you type. Your text stays in this browser.

Your Slack message

0 / 4,000

4,000 left

0 words · 0 lines

Slack character limit

A Slack message can have up to 4,000 characters. PostDelegate sends up to 4,000 characters, the length Slack recommends for one message.

Each Unicode character counts as 1. Some emoji are built from several characters, such as a skin tone or a family, and count as more.

PostDelegate publishes to Slack today. Plan posts on one calendar and schedule them with the Slack scheduler, or have your assistant draft them: Claude · ChatGPT · Claude Code · Codex · Cursor · Gemini CLI. Start your 7-day free trial, no card needed.

What is the Slack character limit?

A Slack message can have up to 4,000 characters. PostDelegate sends up to 4,000 characters, the length Slack recommends for one message.

Do emoji and links count on Slack?

Each Unicode character counts as 1. Some emoji are built from several characters, such as a skin tone or a family, and count as more.

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. Slack checks the final post itself.

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