Social Media Character Limits (2026)

Last updated July 2026

Character limits vary widely across social platforms: X is the tightest at 280 characters per post, while Facebook is the largest at 63,206. In between, Bluesky allows 300, Threads and Mastodon 500, Instagram 2,200, and LinkedIn 3,000. The table below compares every major platform’s post limit, native threading support, and ideal post length.

Character limit comparison

Platform	Post limit	Native threading	Ideal length
X (Twitter)	280	Yes	71–100 chars
Bluesky	300	Yes	150–220 chars
Threads	500	Yes	200–300 chars
Mastodon	500	Yes	—
Instagram	2,200	No	138–150 chars
LinkedIn	3,000	No	1,300–1,900 chars
Facebook	63,206	No	40–80 chars

Character limits by platform

Full breakdowns — including bio, DM, and other secondary limits, plus how each platform handles longer content when cross-posting:

X (Twitter) character limit — 280 characters
Bluesky character limit — 300 characters
Threads character limit — 500 characters
Mastodon character limit — 500 characters
Instagram character limit — 2,200 characters
LinkedIn character limit — 3,000 characters
Facebook character limit — 63,206 characters

Post once. Reach everywhere.

Write on your favorite network and let Postwake replicate it everywhere else — thread-splitting and platform limits handled automatically, with no double-posts.

Join the waitlist Explore Postwake