Accepted Media Formats
Postly supports a wide range of media formats and optimizes your content to meet platform-specific requirements automatically.
Important Notes:
1. Platform-Specific Video Requirements: Postly automatically adapts media to different platform formats, but these platforms have strict requirements:
- Facebook Reels/Stories: 1080 x 1920 px
- Instagram Reels/Stories: 1080 x 1920 px
- TikTok Video Posts: 1080 x 1920 px
2. API-Driven Specifications: Media specifications are determined by platform APIs and may differ from native app capabilities.
TikTok Publishing
Video Specs
• Up to 4GB, 10 minutes
• Formats: MP4, WebM, MOV
• Resolution: 1080x1920px
TikTok only displays content from the title field
YouTube Publishing
Main Content
• Videos up to 10GB
• Shorts auto-published (60s max)
Engagement
• Add first comment in description
Facebook Publishing
Media Options
• Multiple images/videos
• Carousels (10 images)
• Stories (10 images)
Technical Specs
• Images: <8MB, JPEG/PNG/GIF
• Videos: 10GB max, 4 hours
Cannot mix images and videos in same post
Threads Publishing
Text Posts
• 500 character limit
• Replies delayed 15-30s
Media
• Images: 8MB max
• Videos: 1GB, 5 minutes
Instagram Publishing
Posts
• 2,200 character limit
• 8MB images
• 15min videos
Stories
• 100MB max
• 60 seconds duration
Twitter Publishing
Tweets
• 4 images max
• 512MB videos
Features
• Thread support
• Poll creation
• User tagging
LinkedIn Publishing
Content
• 5GB videos
• 9 images max
• Poll support
Google Business Profile
Limitations
• One image at a time
• No video support via API
Pinterest Publishing
Media
• Images and videos
• Formats: MP4, WebM, MOV
Reddit Publishing
Posts
• Media-only publication
• Text with media ignored
Telegram Publishing
Options
• 9 images per post
• Custom bot support
Blogger Publishing
Content
• Text, images, videos
• Multiple formats supported
RSS Feed Publishing
Integration
• Direct feed publishing
• Automatic content sync
WordPress Publishing
Features
• Full blog post support
• Self-hosted compatibility
Recommended Post Lengths
• Ideal: 40-80 chars
• Max: 63,206 chars
• Ideal: 138-150 chars
• Max: 2,200 chars
Full guide: https://blog.postly.ai/guide
Bluesky Publishing
Media Limits
• 1MB images
• 60s videos
• 25/day upload limit