Recommended Image and Video Posting Sizes and Restrictions

When posting attachments to any social media platforms via their API (how third-party platforms like Sendible integrate to social sites) you’ll find that there’s restrictions in place which will cause your posts to bounce if you exceed these requirements.

This is not the case when logging in and posting directly to your social media accounts, however, all social media platforms apply restrictions for users posting via their API, and these restrictions differ from channel to channel.

This article will outline all the restrictions and you can jump to the social site you need by clicking on the social site on the right of this article.


   Twitter-icon.png  Twitter


  • Up to 5 MB
  • Gif images are also supported (up to 1280x1080 pixels)
  • Post photo/in-stream photo: 8192 x 8192 pixels or smaller 


  • Recommended:

    • Recommended Video Codec: H264 High Profile
    • Recommended Frame Rates: 30 FPS, 60 FPS
    • Recommended Video Resolution: 1280x720 (landscape), 720x1280 (portrait), 720x720 (square)
    • Recommended Minimum Video Bitrate: 5,000 kbps
    • Recommended Minimum Audio Bitrate: 128 kbps
    • Recommended Audio Codec: AAC LC
    • Recommended Aspect Ratio: 16:9 (landscape or portrait), 1:1 (square)


    • Frame rate must be 60 FPS or less
    • Dimensions must be between 32x32 and 1280x1024
    • File size must not exceed 512 mb
    • Duration must be between 0.5 seconds and 140 seconds
    • Aspect ratio must be between 1:3 and 3:1
    • Must have 1:1 pixel aspect ratio
    • Only YUV 4:2:0 pixel format is supported
    • Audio must be AAC with Low Complexity profile. High-Efficiency AAC is not supported
    • Audio must be mono or stereo, not 5.1 or greater
    • Must not have open GOP
    • Must use progressive scan


   92757_like_606x606.png  Facebook


  • Up to 4 MB
  • Gif images are not supported
  • Profile picture: 180 x 180 pixels
  • Cover photo: 851 x 315 pixels (maximum file size of 100 KB)
  • Desktop newsfeed: 1200 x 630 pixels


  • No larger than 250 MB
  • Up to 59 minutes in length
  • Adding a YouTube link will post as a link preview which when clicked on, will open YouTube in a new tab to play the video.


   color.png  Instagram 


Please Note:
The following restrictions mainly apply when posting to Instagram Business Profiles through Instagram's API, as posting with an Instagram Reminder (Post) service is manual and will still go through the Instagram mobile app natively.
Please Note:
Instagram doesn't allow multiple images, Stories or animated GIFs to be posted through their Instagram Business API, so you'll need to do so using our Instagram Reminder (Post) service with push notifications, as shown here.


  • Up to 8 MB
  • Formats: JPEG, PNG, BMP, and non-animated GIFs
  • Square - 1:1 aspect ratio
  • Portrait images - 4:5 aspect ratio
  • Landscape images - Max 1.91:1
  • Aspect ratio: Must be within a 4:5 to 1.91:1 range
  • Minimum resolution: 150x150 (lower resolutions will be scaled up to the minimum)
  • Maximum resolution: 4032x3024 (higher resolutions will be scaled down to the maximum)


Important Note:
MOV videos might fail to post at some instances and can be less consistent than MP4 videos, but we are looking to address this ASAP.
  • Format: MOV or MP4
  • Frame rate: 23-60 FPS.
  • File size: 100 Mb maximum
  • Bitrate: VBR, 5Mbps maximum
  • Duration: 60 seconds maximum, 3 seconds minimum
  • Audio codec: AAC, 48khz sample rate maximum, 1 or 2 channels (mono or stereo).
  • Video codec:
    • HEVC
    • H264
    • Progressive Scan
    • Closed GOP
    • 4:2:0 chroma subsampling
  • Picture size:
    • Maximum columns (horizontal pixels): 1920
    • Minimum aspect ratio [cols / rows]: 4 / 5
    • Maximum aspect ratio [cols / rows]: 16 / 9


   92756_play_607x607.png  YouTube 


  • No longer than 59 minutes
  • Channel icon: 800 x 800 pixels (this will get rendered to 98 x 98 pixels)
  • Video thumbnail: 1280 x 760 pixels
  • Channel art: 2560 x 1440 pixels
  • (Make sure you check the template as cropping varies widely from TV to mobile to desktop)
Important Note:
Images are not allowed, and your YouTube account will need to be verified, in order for you to be able to post videos with a duration longer than 15 minutes.


   888033_logo_512x512.png  LinkedIn


  • Up to 900 width X 470 height pixels (For best results, when posting via Sendible)
  • Up to 10 MB
  • Gif images are not supported
  • Images for posts: 7600 x 7600 pixels (however, very large images will be resized to standard sizes)
Please Note:
Images that are posted to LinkedIn will be displayed in the home feed with the standard 1.91:1 aspect ratio. So if the image posted is wider or taller than this aspect ratio, it will appear cropped to fit this standard shape, but will display normally when opened.



  • Native Videos available to Company Pages only (Playing video inside of
  • Up to 200MB for Company Pages
  • Posting videos to LinkedIn Profiles will display as a link (Which when clicked on will open in a new tab outside of
  • YouTube links will display normally and will auto-play


   109358_network_512x512.png  Tumblr


  • Up to 5 MB
  • Gif images are also supported


  • Any video files uploaded will appear as an image which when clicked on, will open in a new page to play the video


  logo_google_my_business_color_2x_web_64dp.png  Google My Business


  • Only images with a 16:9 aspect ratio are allowed
  • Minimum size - 480 x 270
  • Maximum size - 2120 x 1192
  • Only uploading cover photos are supported
Important Note:
Videos are not allowed


   images.png  Wordpress


  • Up to 5 MB
Important Note:
Videos are not allowed


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