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Social media character limits and media specs

The text, media and format limits for every network Smartplannr publishes to, in one place. They’re the same limits the Smartplannr composer checks as you write, so this page and the app never disagree.

Checked against each network’s official documentation on 8 September 2026

At a glance

NetworkPost textFormats
Instagram2,200 charactersSingle image, Carousel, Reel, Story
Facebook63,206 charactersText post, Image post, Multiple-image post, Video, Link post, Story
LinkedIn3,000 charactersText post, Image post
X280 charactersText post
Threads500 charactersText post, Image post, Video, Carousel
TikTok2,200 charactersVideo
YouTube5,000 charactersVideo, Short

Every file can be up to 200 MB in Smartplannr; each network’s own limits below apply on top.

Instagram

FormatMedia
Post textUp to 2,200 characters
Single image1 image
Carousel2–10 images or videos
Reel1 video
Story1 image or video
  • Up to 30 hashtags in a caption
  • Feed images between 4:5 and 1.91:1
  • JPEG images up to 8 MB (other formats are converted)
  • Reels from 3 seconds to 15 minutes
  • Stories: one image or video up to 60 seconds, without a caption
  • Alt text up to 1,000 characters
  • A first comment can go out straight after the post

Not in Smartplannr yet: Story stickers, links and music.

Instagram’s official documentation

Facebook

FormatMedia
Post textUp to 63,206 characters
Text postText only
Image post1 image
Multiple-image post2–10 images
Video1 video
Link postA link, no media
Story1 image or video
  • Up to 10 images in one post
  • A link post needs a full http(s) link
  • A first comment can go out straight after the post
  • Stories: one photo or video (video 3–60 seconds), without a caption
  • Pages only, not personal profiles

Not in Smartplannr yet: Reels.

Facebook’s official documentation

LinkedIn

FormatMedia
Post textUp to 3,000 characters
Text postText only
Image post1 image
  • Personal profiles; connections last 60 days

Not in Smartplannr yet: Company Pages, video, document and multi-image posts.

LinkedIn’s official documentation

X

FormatMedia
Post textUp to 280 characters
Text postText only
  • Every link counts as 23 characters
  • Some characters, such as many emoji, count as two

Not in Smartplannr yet: Images, threads, replies, quotes and polls.

X’s official documentation

Threads

FormatMedia
Post textUp to 500 characters
Text postText only
Image post1 image
Video1 video
Carousel2–20 images or videos
  • Carousels of 2 to 20 items
  • Choose who can reply when you post; it can’t be changed afterwards

Not in Smartplannr yet: Replies, quotes, link attachments and polls.

Threads’s official documentation

TikTok

FormatMedia
Post textUp to 2,200 characters
Video1 video
  • Video posts only
  • Choose who can view each video from the audiences TikTok allows your account
  • Turn comments, Duet and Stitch on or off, and disclose branded content

Not in Smartplannr yet: Photo posts and carousels.

TikTok’s official documentation

YouTube

FormatMedia
Post textUp to 5,000 characters
Video1 video
Short1 video
  • Title up to 100 characters, without < or >
  • Description up to 5,000 bytes
  • Tags up to 500 characters in total
  • Thumbnails: JPG or PNG, up to 50 MB
  • Shorts: one square or vertical video, up to 3 minutes

Not in Smartplannr yet: Live streams, playlists and subtitles.

YouTube’s official documentation

Questions

Each network’s official developer documentation, linked under its table. They were last checked on 8 September 2026.

X counts every link as 23 characters and some characters, such as many emoji, as two.

No. The Smartplannr composer checks each version against its network’s limits as you write, and tells you what to fix before you schedule.

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