Reference · updated from official docs

Social Media Posting Limits by Platform

Name: Social Media Posting Limits by Platform (2026) – Character, Image, Video & API Rules
Creator: SocialEcho
License: https://creativecommons.org/licenses/by/4.0/
Keywords: social media character limits, social media image sizes, social media video specs, posting limits by platform, platform API limits, instagram caption limit, tiktok video length limit, linkedin post character limit, x post character limit

Character, image, video, media-count and publishing rules for every platform and format we publish to — each with its official source and the date we last verified it.

This is the same rule set that powers SocialEcho's publisher and the Platform Content Rules Checker, published as a plain reference so you can cite it, bookmark it or check a spec without running the tool. Rules marked as hard limits are enforced by the platform API; the rest are recommendations.

Platform: 8
Format: 14
Verified: 2026-09-29

Rules version: 2026.09.29-scope-review-v2

Facebook

3 format

Reels

Partially verified

Hard limits for Facebook Reels.

Check a post against these rules →

Text

Rule	Limit	Hard limit
Character limit	2200 chars	Hard limit

Images

Rule	Limit	Hard limit
Image format	N/A	Hard limit
Image file size	N/A	Hard limit
Image resolution	N/A	Hard limit

Video

Rule	Limit	Hard limit
Video format	MP4, MOV Recommended resolution: width >= 540 px, height >= 960 px, ratio 9:16	Hard limit
Video file size	Up to 1 GB	Hard limit
Video duration	Pending verification	Hard limit
Frame rate	Not specified	Hard limit

Media count

Rule	Limit	Hard limit
Max images per post	0	Hard limit
Max videos per post	1	Hard limit
Mixed media	No	Hard limit
Carousel supported	No	Hard limit

Post

Verified

Hard limits for Facebook posts.

Check a post against these rules →

Text

Rule	Limit	Hard limit
Character limit	2200 chars	Hard limit

Images

Rule	Limit	Hard limit
Image format	JPG, JPEG, PNG, GIF	Hard limit
Image file size	Up to 8 MB (static/GIF)	Hard limit
Image resolution	No fixed limit	Hard limit

Video

Rule	Limit	Hard limit
Video format	MP4, MOV Resolution/ratio: no fixed limit	Hard limit
Video file size	Up to 1 GB	Hard limit
Video duration	Up to 20 min	Hard limit
Frame rate	Not specified	Hard limit

Media count

Rule	Limit	Hard limit
Max images per post	10	Hard limit
Max videos per post	1	Hard limit
Mixed media	No	Hard limit
Carousel supported	Yes	Hard limit

Story

Verified

Hard limits for Facebook stories.

Check a post against these rules →

Text

Rule	Limit	Hard limit
Character limit	0 (body not allowed)	Hard limit

Images

Rule	Limit	Hard limit
Image format	JPG, JPEG, PNG	Hard limit
Image file size	Up to 4 MB	Hard limit
Image resolution	No fixed limit	Hard limit

Video

Rule	Limit	Hard limit
Video format	MP4, MOV Recommended resolution: width >= 540 px, height >= 960 px, ratio 9:16	Hard limit
Video file size	Up to 1 GB	Hard limit
Video duration	Up to 60 sec	Hard limit
Frame rate	Not specified	Hard limit

Media count

Rule	Limit	Hard limit
Max images per post	1	Hard limit
Max videos per post	1	Hard limit
Mixed media	No	Hard limit
Carousel supported	No	Hard limit

Instagram

3 format

Reels

Verified

Hard limits for Instagram Reels.

Check a post against these rules →

Text

Rule	Limit	Hard limit
Character limit	2200 chars	Hard limit

Images

Rule	Limit	Hard limit
Image format	JPG, JPEG, PNG	Hard limit
Image file size	Up to 8 MB	Hard limit
Image resolution	Width 320-1440, aspect 0.01:1 to 10:1	Hard limit

Video

Rule	Limit	Hard limit
Video format	MP4, MOV Supported width: 1-1920 px; recommended ratio: 9:16	Hard limit
Video file size	Up to 300 MB	Hard limit
Video duration	Up to 15 min	Hard limit
Frame rate	Not specified	Hard limit

Media count

Rule	Limit	Hard limit
Max images per post	0	Hard limit
Max videos per post	1	Hard limit
Mixed media	No	Hard limit
Carousel supported	No	Hard limit

Post

Verified

Hard limits for Instagram posts.

Check a post against these rules →

Text

Rule	Limit	Hard limit
Character limit	2200 chars	Hard limit

Images

Rule	Limit	Hard limit
Image format	JPG, JPEG, PNG, GIF	Hard limit
Image file size	Up to 8 MB	Hard limit
Image resolution	Width 320-1440, aspect 0.8:1 to 1.91:1	Hard limit

Video

Rule	Limit	Hard limit
Video format	MP4, MOV Supported ratio: 0.1:1 to 10:1 (config value 0.01-10); width 1-1920 px	Hard limit
Video file size	Up to 4 GB	Hard limit
Video duration	Up to 60 sec	Hard limit
Frame rate	Not specified	Hard limit

Media count

Rule	Limit	Hard limit
Max images per post	10	Hard limit
Max videos per post	1	Hard limit
Mixed media	Yes (image+GIF, image+video)	Hard limit
Carousel supported	Yes	Hard limit

Story

Verified

Hard limits for Instagram stories.

Check a post against these rules →

Text

Rule	Limit	Hard limit
Character limit	0	Hard limit

Images

Rule	Limit	Hard limit
Image format	JPG, JPEG, PNG	Hard limit
Image file size	Up to 8 MB	Hard limit
Image resolution	Width 320-1440, aspect 0.8:1 to 1.91:1	Hard limit

Video

Rule	Limit	Hard limit
Video format	MP4, MOV Supported width: 1-1920 px; recommended ratio: 9:16	Hard limit
Video file size	Up to 300 MB	Hard limit
Video duration	Up to 60 sec	Hard limit
Frame rate	Not specified	Hard limit

Media count

Rule	Limit	Hard limit
Max images per post	1	Hard limit
Max videos per post	1	Hard limit
Mixed media	No	Hard limit
Carousel supported	No	Hard limit

X

2 format

Short Post

Verified

Hard limits for X short posts.

Check a post against these rules →

Text

Rule	Limit	Hard limit
Character limit	280 chars (CJK counts as 2 chars)	Hard limit

Images

Rule	Limit	Hard limit
Image format	JPG, JPEG, PNG, GIF	Hard limit
Image file size	Static up to 5 MB, GIF up to 15 MB	Hard limit
Image resolution	Width/height 4-8192, ratio unlimited	Hard limit

Video

Rule	Limit	Hard limit
Video format	MP4, MOV Supported resolution: width 32-3840, height 32-2560; ratio 1:3 to 3:1	Hard limit
Video file size	Up to 512 MB	Hard limit
Video duration	Up to 140 sec	Hard limit
Frame rate	Not specified	Hard limit

Media count

Rule	Limit	Hard limit
Max images per post	4	Hard limit
Max videos per post	1	Hard limit
Mixed media	Yes (image+video), no image+GIF	Hard limit
Carousel supported	Yes	Hard limit

Long Post

Verified

Hard limits for X long posts.

Check a post against these rules →

Text

Rule	Limit	Hard limit
Character limit	25000 chars (CJK counts as 2 chars)	Hard limit

Images

Rule	Limit	Hard limit
Image format	JPG, JPEG, PNG, GIF	Hard limit
Image file size	Static up to 5 MB, GIF up to 15 MB	Hard limit
Image resolution	Width/height 4-8192, ratio unlimited	Hard limit

Video

Rule	Limit	Hard limit
Video format	MP4, MOV Supported resolution: width 32-3840, height 32-2560; ratio 1:3 to 3:1	Hard limit
Video file size	Up to 512 MB	Hard limit
Video duration	Up to 140 sec	Hard limit
Frame rate	Not specified	Hard limit

Media count

Rule	Limit	Hard limit
Max images per post	4	Hard limit
Max videos per post	1	Hard limit
Mixed media	Yes (image+video), no image+GIF	Hard limit
Carousel supported	Yes	Hard limit

1 format

Post

Verified

Hard limits for LinkedIn posts.

Check a post against these rules →

Text

Rule	Limit	Hard limit
Character limit	3000 chars	Hard limit

Images

Rule	Limit	Hard limit
Image format	JPG, PNG, GIF	Hard limit
Image file size	Static up to 5 MB, GIF up to 8 MB	Hard limit
Image resolution	No fixed limit	Hard limit

Video

Rule	Limit	Hard limit
Video format	MP4 Supported resolution: width 1-4096, height 1-2304; ratio 1:2.4 to 2.4:1	Hard limit
Video file size	Up to 500 MB	Hard limit
Video duration	Up to 10 min	Hard limit
Frame rate	Not specified	Hard limit

Media count

Rule	Limit	Hard limit
Max images per post	20	Hard limit
Max videos per post	1	Hard limit
Mixed media	Yes (image+GIF), no image+video	Hard limit
Carousel supported	Yes	Hard limit

TikTok

1 format

Post

Verified

Hard limits for TikTok posts.

Check a post against these rules →

Text

Rule	Limit	Hard limit
Character limit	4000 chars	Hard limit

Images

Rule	Limit	Hard limit
Image format	JPG, JPEG, WEBP	Hard limit
Image file size	Up to 20 MB	Hard limit
Image resolution	No fixed limit	Hard limit

Video

Rule	Limit	Hard limit
Video format	MP4, MOV Supported resolution: width >= 360 px, height >= 360 px; ratio unlimited	Hard limit
Video file size	Up to 1 GB	Hard limit
Video duration	Up to 10 min	Hard limit
Frame rate	Not specified	Hard limit

Media count

Rule	Limit	Hard limit
Max images per post	35	Hard limit
Max videos per post	1	Hard limit
Mixed media	No	Hard limit
Carousel supported	Yes (multi-image)	Hard limit
Posting frequency	15 posts per 24h window	Hard limit

YouTube

2 format

Shorts

Verified

Hard limits for YouTube Shorts.

Check a post against these rules →

Text

Rule	Limit	Hard limit
Character limit	5000 chars	Hard limit

Images

Rule	Limit	Hard limit
Image format	N/A	Hard limit
Image file size	N/A	Hard limit
Image resolution	N/A	Hard limit

Video

Rule	Limit	Hard limit
Video format	MP4, MOV	Hard limit
Video file size	Up to 2 GB	Hard limit
Video duration	Up to 180 sec Recommended for Shorts distribution: keep under 60 sec; recommended ratio 9:16	Hard limit
Frame rate	Not specified	Hard limit

Media count

Rule	Limit	Hard limit
Max images per post	0	Hard limit
Max videos per post	1	Hard limit
Mixed media	No	Hard limit
Carousel supported	No	Hard limit

Video

Verified

Hard limits for YouTube videos.

Check a post against these rules →

Text

Rule	Limit	Hard limit
Character limit	5000 chars	Hard limit

Images

Rule	Limit	Hard limit
Image format	N/A	Hard limit
Image file size	N/A	Hard limit
Image resolution	N/A	Hard limit

Video

Rule	Limit	Hard limit
Video format	MP4, MOV	Hard limit
Video file size	Up to 2 GB	Hard limit
Video duration	Up to 12 hours	Hard limit
Frame rate	Not specified	Hard limit

Media count

Rule	Limit	Hard limit
Max images per post	0	Hard limit
Max videos per post	1	Hard limit
Mixed media	No	Hard limit
Carousel supported	No	Hard limit

1 format

Post

Verified

Hard limits for Pinterest posts.

Check a post against these rules →

Text

Rule	Limit	Hard limit
Character limit	500 chars	Hard limit

Images

Rule	Limit	Hard limit
Image format	JPG, JPEG, PNG	Hard limit
Image file size	Up to 20 MB	Hard limit
Image resolution	Width >= 200 px, height >= 300 px	Hard limit

Video

Rule	Limit	Hard limit
Video format	MP4, MOV	Hard limit
Video file size	Up to 2 GB	Hard limit
Video duration	Up to 15 min	Hard limit
Frame rate	Not specified	Hard limit

Media count

Rule	Limit	Hard limit
Max images per post	1	Hard limit
Max videos per post	1	Hard limit
Mixed media	No	Hard limit
Carousel supported	No	Hard limit

1 format

Post

Verified

Hard limits for Reddit posts.

Check a post against these rules →

Text

Rule	Limit	Hard limit
Character limit	Body unlimited, title 1-300 chars	Hard limit

Images

Rule	Limit	Hard limit
Image format	JPG, JPEG, PNG, GIF	Hard limit
Image file size	No fixed limit	Hard limit
Image resolution	No fixed limit	Hard limit

Video

Rule	Limit	Hard limit
Video format	MP4, MOV	Hard limit
Video file size	Up to 512 MB	Hard limit
Video duration	Up to 15 min	Hard limit
Frame rate	Not specified	Hard limit

Media count

Rule	Limit	Hard limit
Max images per post	20	Hard limit
Max videos per post	1	Hard limit
Mixed media	Yes (image+GIF), no image+video	Hard limit
Carousel supported	Yes	Hard limit

Platforms change these limits without notice. When a source is updated we bump the rules version first and the copy second; the verification date on each source tells you how fresh the row is.

Platform Content Rules Checker

Pick a platform and format, paste your draft, and see which rules it breaks before you publish.

Platform Content Rules Checker

Check platform + format constraints for text, media types, media counts, and publishing requirements in one place.