Slack character counter
Slack allows 40,000 characters per post. Paste yours to see whether it fits. Free, and nothing you type leaves your browser.
0 characters
- SlackFits0 / 40,000
Slack limit questions
Still deciding? The free trial is the quickest way to find out. It takes about a minute to set up.
What is the Slack character limit?
40,000 characters per post.
Do emojis and links count?
Yes. Every character you see counts once, including an emoji, a flag or an accented letter. Links count in full here; a few networks, such as Mastodon, count every link as 23 characters, so a long link uses less of the limit there.
How many images can a Slack post have?
Up to 10 per post.
Can I post videos to Slack?
Videos uploaded as files, up to 1 GB each
What if my post is too long for Slack?
Shorten it, or in Postzora give Slack its own shorter version while your other networks keep the full text.
Character counters for other networks
Write once. Fit Slack and every other network.
Postzora shows each network’s limit as you write and lets you shorten one version without touching the others.