Ideal File Sizes, Formats, and Media Limits for Social Media posts

Written By Ghina Rehman

Last updated 2 months ago

Creating the perfect post requires more than just creativity. It also means tailoring content to each platform's technical requirements. Here’s a complete guide to the ideal file sizes, formats, media counts, and aspect ratios for major social media platforms.

📌 General Media Limits

  • Maximum image size: 15 MB

  • Maximum video size: 953 MB

Facebook

Note: Every video uploaded to Facebook is now considered a Reel, regardless of its duration or format.

  • Media count: 80 images or 1 video

  • Caption/text limit: 5,000 characters

  • Formats supported: JPG, PNG, BMP, WEBP, TIFF, JPEG, MP4, M4V, MOV, QT, AVI, HEIC

    Video duration: 1 second to 2 hours

    Recommended aspect ratios:

    • Images: 1:1, 1.91:1, 4:5, 2:3, 16:9, 9:16

    • Videos: 16:9, 4:5, 1:1, 2:3, 9:16

Twitter

  • Media count: 4 images or 1 video

  • Caption/text limit: 280 characters

  • Formats supported: JPG, PNG, WEBP, GIF, JPEG, MP4, M4V, MOV, QT, AVI, HEIC

    Video duration: 1 to 140 seconds

    Recommended aspect ratios:

    • Images: 1:1, 1.91:1, 16:9

    • Videos: 16:9, 4:5, 1:1, 2:3, 9:16

Instagram

  • Media count: 10 images or 1 video

  • Caption/text limit: 2,000 characters

  • Video story limit: 60 seconds

  • Video duration: 3 seconds to 15 minutes

    Formats supported: JPG, PNG, JPEG, MP4, WEBP, M4V, MOV, QT, AVI, HEIC

    Recommended aspect ratios:

    • Images: 1:1, 1.91:1, 4:5, 16:9

    • Videos: 1:1, 1.91:1, 4:5, 16:9

LinkedIn

  • Media count: 9 images or 1 video

  • Caption/text limit: 3,000 characters

  • Video duration: 3 seconds to 10 minutes

    Formats supported: JPG, PNG, WEBP, JPEG, GIF, MP4, HEIC, PDF, PPT, DOC

    Recommended aspect ratios:

    • Images: 1:1

    • Videos: 1:1

Google Business Profile

  • Media count: 1 image

  • Caption/text limit: 1,500 characters

    Formats supported: JPG, PNG, JPEG, HEIC

    Recommended aspect ratios:

    • Images: 4:3

Mastodon

  • Media count: 4 images or 1 video

  • Caption/text limit: 500 characters

  • Video duration: 2 minutes 20 seconds

    Formats supported: JPG, PNG, WEBP, GIF, JPEG, MP4, M4V, MOV, QT, AVI, HEIC

    Recommended aspect ratios:

    • Images: 1:1, 1.91:1, 16:9

    • Videos: 16:9, 4:5, 1:1, 2:3, 9:16

YouTube

  • Media count: 1 video

  • Caption/text limit: 5,000 characters

  • Video duration: Up to 12 hours

    Formats supported: MP4, M4V, MOV, QT, AVI

    Recommended aspect ratios:

    • Videos: 16:9, 9:16

Reddit/Subreddit

  • Media count: 1 image or 1 video

  • Caption/text limit: 1,000 characters

  • Video duration: Up to 15 minutes

    Formats supported: JPG, PNG, WEBP, GIF, JPEG, MP4, M4V, MOV, QT, AVI, HEIC

    Recommended aspect ratios:

    • Images: 1:1, 1.91:1, 4:5, 2:3, 16:9, 9:16

    • Videos: 1:1, 1.91:1, 4:5, 2:3, 16:9, 9:16

TikTok

  • Media count: 1 video

  • Caption/text limit: None

  • Video duration: Up to 10 minutes

    Formats supported: MP4, M4V, MOV, QT, AVI

    Recommended aspect ratios:

    • Videos: 16:9, 9:16

  • Frame rate: 23–60 FPS

Pinterest

  • Media count: 1 image or 1 video

  • Caption/text limit: 500 characters

  • Video duration: 1 second to 5 minutes

    Formats supported: JPG, PNG, WEBP, JPEG, MP4, QT, M4V, MOV

    Recommended aspect ratios:

    • Images: 2:3

    • Videos: 2:3

BlueSky

  • Media count: 4 images or 1 video

  • Caption/text limit: 300 characters

    Formats supported: 'jpg', 'png', 'gif', 'jpeg', 'webp', 'mp4', 'm4v', 'mov', 'qt', 'avi'

    Recommended aspect ratios:

    • Images: 1:1, 1.91:1, 16:9

Threads

  • Media count: 10 images or 1 video

  • Caption/text limit: 500 characters

  • Video duration: 5 minutes

    Formats supported: JPG, PNG, JPEG, MP4, M4V, MOV, QT, AVI, WEBP

    Recommended aspect ratios:

    • Images: 1:1, 1.91:1, 16:9

    • Videos: 16:9, 4:5, 1:1, 2:3, 9:16

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