Media Attachments Guide

Publish allows you to add images or videos to any post you create. However, our platform's recommended specifications for media files may be different from the networks'. Follow our media attachment guidelines below to help you create image and video posts that look and sound optimal on any device. 


Facebook

Your media files can be published to Facebook as single-image posts, multi-image posts, or video posts. For now, Facebook Reels and Stories are not supported. Learn more.

Images

Specification Recommendation
File type

JPG/JPEG, PNG, GIF, BMP, TIFF. Only single-frame GIFs are supported. Animated GIFs are not.

Size

10 MB maximum. For PNG files, images exceeding 1MB may appear pixelated. 

Dimensions (W x H)

1200 x 628 (Landscape 1.91:1)
1200 x 1200 (Square 1:1)
1080 x 1350 (Portrait 4:5)
1200 x 1800 (Portrait 2:3)

 

Videos 

Specification Recommendation
File type

3G2, 3GP, ASF, AVI, DAT, DIVX, DV, F4V, FLV, M2TS, M4V, M2TS, M4V, MKV, MOD, MOV, MP4, MPE, MPEG, MPEG4, MPG, MTS, NSV, OGM, OGV, QT, TOD, TS, VOB, WMV

Size

10 GB maximum

Aspect ratio (W / H)

9:16 to 16:9

Duration

4 hours maximum

Audio bitrate

256 kbps maximum

Audio codec

AAC

Audio sample rate

48 KHz

Audio channel layout

Stereo or mono

 

Thumbnails

The following recommendations are for uploading custom video thumbnails. Custom link preview thumbnails follow the same recommendations as Facebook image posts, although they can only be used if the link is from a domain that you own.

Specification Recommendation
File type

BMP, GIF, JPG/JPEG, PNG, TIFF

Size

10 MB maximum

Aspect ratio (W / H)

The thumbnail's aspect ratio should match the video's.


Instagram

Your media files can be published to Instagram as single-image posts, multi-image posts, carousels, Stories, or Reels. Learn more.

Images (single image or carousel post)

Specification Recommendation
File type

JPG/JPEG, PNG

Size

8 MB maximum 

Dimensions (W x H)

320 to 1440 pixels wide maximum. Your image will be scaled up or down if necessary.

Aspect ratio (W / H)

1.91:1 to 4:5 (1:1 recommended)

Color profile

sRGB. Your image will be converted if necessary.

Story images

Specification Recommendation
File type

JPG/JPEG, PNG

Size

8 MB maximum 

Resolution (W x H)

320 to 1440 pixels wide maximum. Your image will be scaled up or down if necessary.

Aspect ratio (W / H)

1.91:1 to 4:5 (1:1 recommended)

Color profile

sRGB. Your image will be converted if necessary.

Videos (Reel or single Feed video)

Note:

Instagram's algorithm determines which videos are eligible as a reel. Although a video that meets the recommended specifications below isn't guaranteed to appear in the Reels feed, it must meet these specifications in order to be accepted as a reel by Instagram. 

Specification Recommendation
Size

1 GB maximum

Duration

3 seconds to 15 minutes

Note: Reels under 90 seconds may be eligible to be recommended in places such as Explore, Reels, and Feed Recommendations to people who don't already follow the channel.

Aspect ratio (W / H)

0.01:1 to 10:1 (we recommend 9:16 to avoid cropping or blank space).

File type

MOV, MP4 (MPEG-4 Part 14)

Resolution/picture size (W x H)

1920 pixels wide maximum

Frame rate

23 fps to 60 fps

Audio codec

AAC, 48khz sample rate maximum, 1 or 2 channels (mono or stereo)

Video codec

HEVC, H.264, progressive scan, closed GOP, 4:2:0 chrome subsampling 

Video bitrate

VBR, 5 Mbps maximum

Note: This bitrate accommodates most videos with a resolution of 720p or lower. To publish videos with a resolution of 1080p or higher, please use our Hub App.

Audio bitrate

128 kbps maximum

Videos (Carousel posts)

Specification Recommendation
Size

Up to 100 MB

Duration

3 to 90 seconds

Aspect ratio (W / H)

4:5 to 16:9

File type

MOV, MP4 (MPEG-4 Part 14)

Resolution/picture size (W x H)

1920 pixels wide maximum

Frame rate

23 to 60 fps

Audio codec AAC, 48khz sample rate maximum, 1 or 2 channels (mono or stereo)
Video codec HEVC or H264, progressive scan, closed GOP, 4:2:0 chroma subsampling
Video bitrate

VBR, 5 Mbps maximum

Note: This bitrate accommodates most videos with a resolution of 720p or lower. To publish videos with a resolution of 1080p or higher, please use our Hub App.

Audio bitrate

128 kbps maximum

Story videos

Specification Recommendation
Size

100 MB maximum

Duration

3 to 60 seconds

Aspect ratio (W / H)

0.1:1 to 10:1 but we recommend 9:16 to avoid cropping or blank spaces.

File type

MOV, MP4 (MPEG-4 Part 14)

Resolution/picture size (W x H)

1920 pixels wide maximum

Frame rate

23 fps to 60 fps

Audio codec

AAC, 48khz sample rate maximum, 1 or 2 channels (mono or stereo).

Video codec

HEVC or H264, progressive scan, closed GOP, 4:2:0 chroma subsampling.

Video bitrate

VBR, 5 Mbps maximum

Note: This bitrate accommodates most videos with a resolution of 720p or lower. To publish videos with a resolution of 1080p or higher, please use our Hub App.

Audio bitrate

128 kbps maximum

Thumbnails

Specification Recommendation
File size 8 MB maximum
File type JPG/JPEG

X (Twitter)

Your media files can be published to X (Twitter) as single-image posts, multi-image posts, GIF posts, or video posts. Learn more.

Images

Specification Recommendation
File type

JPG/JPEG, PNG, WEBP

Size

5 MB maximum 

GIFs

Specification Recommendation
File type

GIFs. Only animated GIFs are supported. Single-frame GIFs are not.

Size

15 MB maximum 

Dimensions (W x H)

1280 x 1080

Pixels (W x H x frames)

300M pixels maximum

Frames

2 - 350 frames

Videos

Specification Recommendation
File type

MOV, MP4 (MPEG-4 Part 14)

Size

512 MB maximum

Dimensions (W x H)

32 x 32 to 1280 x 1024

Aspect ratio (W / H)

1:3 to 3:1

Duration

0.5 to 140 seconds

Frame rate

60 fps maximum

Video bitrate

5000 kbps minimum

Audio bitrate

128 kbps minimum

Video codec

H264 High Profile

Audio codec

AAC LC


LinkedIn

Your media files can published to LinkedIn as single-image posts, multi-image posts, video posts, and link posts. For now, PDF/document posts are not supported. Learn more.

Images

Specification Recommendation
File type

JPG/JPEG, PNG, GIF

Size

10 MB maximum 

Pixels (W x H x frames)

36.15M pixels maximum

Frames

250 frames maximum

Videos

Specification Recommendation
File type

MP4 (MPEG-4 Part 14)

Size

75 KB to 200 MB

Dimensions (W x H)

1920 x 1920 maximum

Duration

3 seconds to 30 minutes

Frame rate

30 fps maximum

Video codec

H.264 or VP8

Audio codec

AAC or MPEG4

Audio sample rate

64 KHz

Thumbnails

The following recommendations are for uploading custom link preview thumbnails. For now, custom video thumbnails are only available for Facebook.

Specification Recommendation
File type

JPG/JPEG, PNG, GIF

Size

10 MB maximum 

Pixels (W x H x frames)

36.15M pixels maximum

Frames

250 frames maximum


TikTok

Your media files can be published to TikTok as video posts. Learn more.

Videos

Specification Recommendation
File type

MOV, MP4 (MPEG-4 Part 14)

Size

1 GB maximum

Dimensions (W x H)

360 x 360 minimum

Aspect ratio (W / H)

9:16, 16:9, 1:1

Duration

3 seconds to 10 minutes

Frame rate

23 fps to 60 fps


FAQs

How do I know if my media is compatible with these guidelines?

Publish will also automatically alert you if...

  1. It detects that one or more of your files' specifications are incompatible with our guidelines, OR
  2. It cannot confirm the compatibility of your files' specifications either way, in which case it's recommended that you check the specifications manually.

On Windows, you can find an image or video's specifications by selecting the file in Explorer and using the keyboard shortcut Alt + Enter, which opens Properties. On Mac, you can select the file in the Finder and use the keyboard shortcut Command + i, which opens Get Info. 

What do I do if my media isn't compatible with these guidelines?

For image posts, you can use Publish's built-in Photo Editor to crop or resize your image based on presets for each network. The Photo Editor will also automatically export your image as a JPG/JPEG, a file type supported by all networks.  

For Instagram video posts, you can use our Hub App to copy your video post to your mobile device to be published on Instagram directly. However, please note that your video will still be subject to Instagram's own requirements.

What are the guidelines for uploading media to the Content Pool?

The only restriction for uploading media to the Content Pool is that the files cannot exceed 1 GB per video or 25 MB per image.

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