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How long can this post be?

Every platform cuts you off somewhere different, and the one that matters is usually the one you forgot you were also posting to. Type or paste your caption and see which platforms take it as it stands.

How this works. The limits on this page are the same numbers Marketeer enforces before it will publish a post for a customer, so they are not a blog post's recollection of the rules. The counter is arithmetic in your browser. Nothing is sent anywhere.

Your caption

0 characters. Counted the way a person counts them, so an emoji is one. Nothing is sent anywhere.

Type a caption to see where it fits.

X280 characters
Limit 280 · 4 images
Why for X
The tightest limit here by a wide margin. A caption written for Instagram will almost never fit, so write the X version first and let the longer platforms have the room.
Bluesky300 characters
Limit 300 · 4 images
Why for Bluesky
Twenty characters more than X, which is just enough to be a trap: a post that fits here can still be rejected there.
Threads500 characters
Limit 500 · 10 images
Why for Threads
Long enough for a proper thought, short enough that a lifted Instagram caption with five hashtag lines will not fit.
Pinterest500 characters
Limit 500 · 1 image
Why for Pinterest
One image per pin, so a multi-photo post has to become several pins or lose everything after the first picture.
Google Business1,500 characters
Limit 1,500 · 1 image
Why for Google Business
Plenty of room, and the one place where a full opening-hours or offer explanation belongs, because this is the post a local searcher actually sees.
Instagram2,200 characters
Limit 2,200 · 10 images
Why for Instagram
The limit is generous but the feed shows only the first line or two before More, so the length that matters in practice is the first 125 characters.
TikTok2,200 characters
Limit 2,200 · 10 images
Why for TikTok
Same ceiling as Instagram, and the same caveat: the caption sits over the video and gets truncated on screen long before the limit.
LinkedIn3,000 characters
Limit 3,000 · 9 images
Why for LinkedIn
Nine images, not ten, which is the one number people get wrong when they cross-post a full Instagram carousel.
YouTube5,000 characters
Limit 5,000 · 1 image
Why for YouTube
This is the video description, so the first two lines carry the links and the rest is for people who scrolled.
Facebook5,000 characters
Limit 5,000 · 10 images
Why for Facebook
The longest limit on the list, which is not an invitation. Long Facebook posts get collapsed behind See more in the feed exactly like Instagram's.

Character and image limits for ten platforms, against your caption
Platform	Limit	Left or over	Images
X Why for X The tightest limit here by a wide margin. A caption written for Instagram will almost never fit, so write the X version first and let the longer platforms have the room.	280	280 characters	4
Bluesky Why for Bluesky Twenty characters more than X, which is just enough to be a trap: a post that fits here can still be rejected there.	300	300 characters	4
Threads Why for Threads Long enough for a proper thought, short enough that a lifted Instagram caption with five hashtag lines will not fit.	500	500 characters	10
Pinterest Why for Pinterest One image per pin, so a multi-photo post has to become several pins or lose everything after the first picture.	500	500 characters	1
Google Business Why for Google Business Plenty of room, and the one place where a full opening-hours or offer explanation belongs, because this is the post a local searcher actually sees.	1,500	1,500 characters	1
Instagram Why for Instagram The limit is generous but the feed shows only the first line or two before More, so the length that matters in practice is the first 125 characters.	2,200	2,200 characters	10
TikTok Why for TikTok Same ceiling as Instagram, and the same caveat: the caption sits over the video and gets truncated on screen long before the limit.	2,200	2,200 characters	10
LinkedIn Why for LinkedIn Nine images, not ten, which is the one number people get wrong when they cross-post a full Instagram carousel.	3,000	3,000 characters	9
YouTube Why for YouTube This is the video description, so the first two lines carry the links and the rest is for people who scrolled.	5,000	5,000 characters	1
Facebook Why for Facebook The longest limit on the list, which is not an invitation. Long Facebook posts get collapsed behind See more in the feed exactly like Instagram's.	5,000	5,000 characters	10

These are the limits Marketeer enforces before it will publish a post, last confirmed on 21 August 2026. Platforms change them; if one of these is wrong, tell us and we will fix it.

The limit is not the number that matters

Instagram will accept 2,200 characters and will show a couple of lines of them in the feed before it collapses the rest behind More. Facebook does the same. So the length that decides whether anybody reads your post is not the platform maximum, it is however much fits above the fold, and on a phone that is usually a sentence or two.

Write the first line as though it were the whole post. Put the offer, the date or the reason to care in it. The remaining two thousand characters are for the people the first line already won.

The cross-posting traps

Bluesky is twenty characters longer than X.: Just enough that a post you checked on one is rejected by the other, and just close enough that nobody thinks to check.
LinkedIn takes nine images, not ten.: A full ten-image Instagram carousel loses its last slide, which is usually the one with the call to action on it.
Pinterest, Google Business and YouTube take one image.: A multi-photo post going to those three is a single-photo post whether you meant it or not.
Emoji count differently depending on who is counting.: Some counters treat one emoji as two characters. This page counts the way a person would, so treat a post sitting within five characters of a limit as over it.

The words on this page, explained

Alt text

A short written description of an image, read aloud by screen readers and read literally by machines.

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