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Social media character limits

The current limit for every field on the main platforms, with a live counter on each page. Platforms change limits now and then, so where sources disagree we say so.

Instagram

FieldLimit
Caption2,200 characters
Bio150 characters
Username30 characters
Name30 characters
Comment2,200 characters
DM1,000 characters

TikTok

FieldLimit
Caption4,000 characters
Bio80 characters
Username24 characters

YouTube

FieldLimit
Title100 characters
Description5,000 characters
Tags500 characters
Channel Description1,000 characters
Comment10,000 characters

X (Twitter)

FieldLimit
Post280 characters
Bio160 characters
Display Name50 characters
Username15 characters
DM10,000 characters

LinkedIn

FieldLimit
Post3,000 characters
Headline220 characters
About Section2,600 characters

Threads

FieldLimit
Post500 characters
Bio150 characters

Pinterest

FieldLimit
Pin Title100 characters
Pin Description500 characters

Compare by field

FieldLimits
CaptionsInstagram: 2,200 · TikTok: 4,000
PostsX (Twitter): 280 · LinkedIn: 3,000 · Threads: 500
BiosInstagram: 150 · TikTok: 80 · X (Twitter): 160 · Threads: 150
UsernamesInstagram: 30 · TikTok: 24 · X (Twitter): 15
Display namesInstagram: 30 · X (Twitter): 50
TitlesYouTube: 100 · Pinterest: 100
DescriptionsYouTube: 5,000 · Pinterest: 500
TagsYouTube: 500
Profile textYouTube: 1,000 · LinkedIn: 220 · LinkedIn: 2,600
CommentsInstagram: 2,200 · YouTube: 10,000
Direct messagesInstagram: 1,000 · X (Twitter): 10,000

Need to check several limits at once? Use the social media character counter. Image sizes are in the sizes and limits cheat sheet.