Accepted Media Formats
Postly makes it simple to upload and manage your content with support for a wide range of media formats.
Postly automatically optimizes and formats images to meet platform-specific requirements.
Supported Image Formats
- JPEG (.jpeg, .jpg)
- PNG (.png)
- BMP (.bmp)
- TIFF (.tif, .tiff)
- WebP (.webp)
- SVG (.svg)
- RAW formats (.raw, .cr2, .nef, .orf, .arw, .rw2)
- ICO (.ico)
- HEIC (.heic)
Supported Video Formats
- MP4 (.mp4)
- WebM (.webm)
- MOV (.mov)
![[object Object] icon](/_next/image?url=%2F_next%2Fstatic%2Fmedia%2FTikTokDark.f58ff418.svg&w=64&q=75)
1. TikTok Publishing
- TikTok Post: video up to 4GB and 10 mins: MP4-recommended, WebM, Mov and 1080 x 1920 px.
- Important Note: When posting on TikTok, the platform only displays the content written in the title field. Ensure to include all necessary details in the title to communicate your message effectively.
![[object Object] icon](/_next/image?url=%2F_next%2Fstatic%2Fmedia%2FYouTubeLight.aebb1c3f.svg&w=64&q=75)
2. YouTube Publishing
- YouTube Post: video up to 10GB.
- YouTube Shorts are automatically published. Shorts can be up to 60 seconds in length. Videos must have a vertical orientation with a 9:16 aspect ratio.
- Add 1st comment to YouTube posts (also known as Description).
![[object Object] icon](/_next/image?url=%2F_next%2Fstatic%2Fmedia%2FFacebookLight.31424592.svg&w=64&q=75)
3. Facebook Publishing
- Facebook First Comment: Publish the First Comment on Facebook posts.
- Multiple Images & Videos, Links.
- Facebook Carousel Post supports up to 10 images and image links.
- Facebook Stories Post supports up to 10 images.
- Supports Image and Video upload via Links.
- Note: You cannot publish images and videos at the same time on Facebook. If combined, only the video will be published, as the API will remove the image.
Facebook Image Types:
- The image must be less than 8MB in size. Format: JPEG, PNG, GIF.
- Image formats: PNG, JPEG, GIFs, etc. You can publish up to 10 images in one post.
- Aspect ratio: Must be within a 4:5 to 1.91:1 range.
- For full specifications, please check the link: Facebook Image specificationNote that uploading via Postly is managed by the Facebook API and may provide a different experience than uploads via Facebook platforms.
Facebook Video:
- Facebook video post: Max size 10GB. Max length 4 hours
Facebook Reels:
- Facebook Reels: Max size 10GB. Max length 90 secs. Format 1080 x 1920 px
Facebook Stories:
- Facebook Stories: Max size 10GB. Max length 60 secs. Format 1080 x 1920 px
- Facebook Stories Carousel: You can publish multiple images, up to 10 images can be published.
Facebook Carousel:
- Now you can publish up to 10 images with associated links to help boost your business awareness and sales.
![[object Object] icon](/_next/image?url=%2F_next%2Fstatic%2Fmedia%2FThreadsDark.78fc7c82.png&w=64&q=75)
4. Threads Publishing
Threads Posts and Replies
- Text posts are limited to 500 characters.
- The API posts all replies after 15 - 30 seconds of publishing the main content.
Threads Image Posts:
- Format: JPEG and PNG image types are the officially supported formats for image posts.
- File Size: 8 MB maximum.
- Aspect Ratio Limit: 10:1.
Threads Video Posts:
- File Size: 1 GB maximum.
- Duration: 300 seconds (5 minutes) maximum, minimum longer than 0 seconds.
![[object Object] icon](/_next/image?url=%2F_next%2Fstatic%2Fmedia%2FInstagramLight.e132a878.svg&w=64&q=75)
5. Instagram Publishing
Instagram First Comment:
- Publish First Comment on Instagram posts.
Instagram collaborator
1. Inviting a Collaborator:
Create your Instagram Feed post or Reel. Use the input field to search and tag collaborators. You can add up to 3 collaborators. Once done, share the post, and your collaborators will receive an invite.
2. Accepting a Collab Request:
Collaborators will get a notification. They can review and tap Accept to have the post appear on their profile.Instagram Image Post:
- For full specification, please check the link: Instagram Content Specification
- Instagram Carousel Post with up to 10 images.
- Format: Postly accepts standard image formats.
- File Size: 8 MB maximum.
Instagram Video Post:
- Instagram video Post: Max size 1GB. Min length 3 secs. Max length 15 mins. Format 1080 x 1080 px
Instagram Reels:
- Instagram Reels: Max size 10GB. Max length 90 secs. Format 1080 x 1920 px
Instagram Stories Image:
- Format: Postly accepts standard image formats.
- File Size: 8 MB maximum.
Instagram Stories Video:
- Instagram Stories video: Max size 100MB. Max length 60 secs. Format 1080 x 1920 px.
![[object Object] icon](/_next/image?url=%2F_next%2Fstatic%2Fmedia%2FTwitterLight.07c1aa2d.svg&w=64&q=75)
6. Twitter publishing
- Twitter Post: video up to 512MB, min 0.5 secs, max 140 secs.
- Images up to 5MB.
- You can upload up to 4 Images per tweet. If you have a Thread, then each tweet on the Thread can contain 4 images.
- Publish Single Tweets and Threads. Threads are automatically generated - user can edit on Preview page.
- Publish Twitter Polls.
![[object Object] icon](/_next/image?url=%2F_next%2Fstatic%2Fmedia%2FBlueskyLight.bc5d4379.svg&w=64&q=75)
7. Bluesky publishing
- Bluesky Post: text, images and videos.
- Text content has a limit of 300 characters.
- Tag users. To tag a user on Bluesky, you need to add the full account link e.g. @postly.bsky.social
- Add hashtags.
![[object Object] icon](/_next/image?url=%2F_next%2Fstatic%2Fmedia%2FLinkedInLight.0b5176a0.svg&w=64&q=75)
8. LinkedIn publishing
- LinkedIn Post: video up to 5GB.
- Publish up to 9 Images per post.
- Images up to 5MB.
- Publish Polls.
![[object Object] icon](/_next/image?url=%2F_next%2Fstatic%2Fmedia%2FGBPLight.45cf4a2a.svg&w=64&q=75)
9. Google Business Profile publishing
- Publish only one image at a time.
- Does not allow video posts at the moment due to API restrictions.
![[object Object] icon](/_next/image?url=%2F_next%2Fstatic%2Fmedia%2FPinterestLight.f134e58d.svg&w=64&q=75)
10. Pinterest publishing
Publish Images and Videos.
Supported media formats: MP4-recommended, WebM, Mov.![[object Object] icon](/_next/image?url=%2F_next%2Fstatic%2Fmedia%2FRedditLight.4b78fdbb.svg&w=64&q=75)
11. Reddit publishing
- Publish Images and Videos.
- Reddit will publish a post description message if ONLY a text post was made.
- If you make a text and image or video post, Reddit will remove the text and publish the image or video.
- Supported media formats: MP4-recommended, WebM, Mov.
![[object Object] icon](/_next/image?url=%2F_next%2Fstatic%2Fmedia%2FTelegramLight.f8c55c9a.svg&w=64&q=75)
12. Telegram publishing
- Publish Images (max size of 5MB) and Videos (max size of 20MB).
- Publish a maximum of 9 images per post.
- Supported media formats: MP4-recommended, WebM, Mov.
- Publish content via the default @postly_bot.
- Publish content via a customized Telegram Bot (check Telegram platform connection page to customize a bot).
![[object Object] icon](/_next/image?url=%2F_next%2Fstatic%2Fmedia%2FBloggerLight.04b0e6be.png&w=64&q=75)
13. Blogger publishing
- Publish Text, Images and Videos.
- Supported media formats: MP4-recommended, WebM, Mov.
![[object Object] icon](/_next/image?url=%2F_next%2Fstatic%2Fmedia%2FRSSFeedLight.a0b74620.svg&w=64&q=75)
14. RSS Feed publishing
- Publish RSS Feed content.
![[object Object] icon](/_next/image?url=%2F_next%2Fstatic%2Fmedia%2FWordPressDark.c31e3e5a.svg&w=64&q=75)
15. WordPress publishing
- Publish blog posts to wordpress.com and hosted WordPress sites.
![[object Object] icon](/_next/image?url=%2F_next%2Fstatic%2Fmedia%2FCrownBlue.c6dea7cc.svg&w=64&q=75)
16. Recommended post lengths
- Facebook:
- Post Length: Ideal: 40-80 characters. Maximum: 63,206 characters.
- Hashtags: Optimal: 1-2 hashtags. Maximum: Unlimited (but best practice is to keep it minimal to avoid looking spammy).
- Instagram:
- Post Length: Ideal: 138-150 characters. Maximum: 2,200 characters.
- Hashtags: Optimal: 5-10 hashtags. Maximum: 30 hashtags per post.
- For a comprehensive list, read our blog post: Comprehensive Guide to Post Lengths on Popular Social Media Platforms.
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