Social Media Format Guide

Optimize your content with Postly's seamless support for platform-specific media formats. Automatically adapt images, videos, and text to meet each platform’s requirements, with premium plans offering unmatched upload capabilities.

Key Information

1. Platform-Specific Requirements: Postly ensures compliance with each platform’s unique media specifications, including aspect ratios and file sizes.

2. API-Driven Specs: Media formats are governed by platform APIs, which may differ from native app capabilities.

TikTok Publishing

Video Specs

• Max size: 4GB

• Duration: Up to 10 minutes

• Formats: MP4, MOV, WebM

• Resolution: 1080x1920px (9:16)

• Frame rate: 23.976–60 fps

• Premium plans: Unlimited high-quality uploads

Text Specs

• Caption: 150 characters max

• Only the Title is displayed in feed

Image Specs

• We dont support direct posting of images at the moment

TikTok prioritizes vertical video content. Ensure videos meet aspect ratio and resolution requirements for optimal performance.

YouTube Publishing

Video Specs

• Max size: 128GB

• Duration: Up to 12 hours

• Formats: MP4, MOV, AVI, WMV, MPEGPS, FLV, 3GPP, WebM

• Resolution: 240p to 4K (recommended 1080p or higher)

• Aspect ratio: 16:9 (standard), 9:16 (Shorts)

• Frame rate: 24–60 fps

• Premium plans: No throttling for long-form content

Text Specs

• Title: 100 characters max

• Description: 5,000 characters max

• Tags: 500 characters total

• First comment support in description

Image Specs

• Thumbnail: 1280x720px, 2MB max

• Formats: JPG, PNG, BMP, GIF

Shorts Specs

• Duration: Up to 60 seconds

• Resolution: 1080x1920px (9:16)

• Auto-published as Shorts if criteria met

YouTube supports a wide range of video formats. Use high-resolution thumbnails for better engagement.

Facebook Publishing

Image Specs

• Max size: 8MB

• Formats: JPEG, PNG, GIF

• Resolution: 1080x1080px (recommended)

• Carousels: Up to 10 images

• Stories: 1080x1920px (9:16)

Video Specs

• Max size: 10GB

• Duration: Up to 4 hours

• Formats: MP4, MOV

• Resolution: 1080p (recommended)

• Aspect ratio: 16:9, 1:1, 4:5, 9:16

• Frame rate: 30 fps max

• Premium plans: High-quality uploads without limits

Reels Specs

• Max size: 4GB

• Duration: Up to 90 seconds

• Resolution: 1080x1920px (9:16)

• Formats: MP4, MOV

Stories Specs

• Max size: 4GB

• Duration: Up to 60 seconds

• Resolution: 1080x1920px (9:16)

• Formats: MP4, MOV

Text Specs

• Post: 63,206 characters max

• Stories: Limited text overlay support

Cannot mix images and videos in the same post. Reels and Stories require vertical formats.

Threads Publishing

Text Specs

• Max length: 500 characters

• Replies delayed 15–30 seconds

Image Specs

• Max size: 8MB

• Formats: JPEG, PNG

• Resolution: 1080x1080px (recommended)

• Up to 10 images per post

Video Specs

• Max size: 1GB

• Duration: Up to 5 minutes

• Formats: MP4, MOV

• Resolution: 1080x1920px (recommended)

• Premium plans: Enhanced video upload capacity

Threads supports limited media types. Ensure content aligns with platform guidelines.

Instagram Publishing

Image Specs

• Max size: 8MB

• Formats: JPEG, PNG

• Resolution: 1080x1080px (1:1), 1080x1350px (4:5), 1080x1920px (9:16)

• Carousels: Up to 10 images

Video Post Specs

• Max size: 4GB

• Duration: 3 seconds to 15 minutes

• Formats: MP4, MOV

• Resolution: 1080x1080px (1:1)

• Frame rate: 23–60 fps

• Premium plans: Seamless high-quality uploads

Reels Specs

• Max size: 4GB

• Duration: Up to 90 seconds

• Formats: MP4, MOV

• Resolution: 1080x1920px (9:16)

• Frame rate: 23–60 fps

Stories Specs

• Max size: 100MB

• Duration: Up to 60 seconds

• Formats: MP4, MOV

• Resolution: 1080x1920px (9:16)

• Frame rate: 23–60 fps

Text Specs

• Caption: 2,200 characters max

• Hashtags: Up to 30

• Stories: Limited text overlay support

Instagram enforces strict aspect ratios for Reels and Stories. Optimize media for vertical display.

Twitter Publishing

Image Specs

• Max size: 5MB

• Formats: JPEG, PNG, GIF

• Resolution: 1200x675px (recommended)

• Up to 4 images per post

Video Specs

• Max size: 512MB

• Duration: Up to 140 seconds

• Formats: MP4, MOV

• Resolution: 1280x720px (recommended)

• Frame rate: 24–60 fps

• Premium plans: Optimized video uploads

Text Specs

• Max length: 280 characters

• Thread support

• Poll creation

Twitter’s API enforces strict media limits. Premium plans enhance video upload capabilities.

LinkedIn Publishing

Image Specs

• Max size: 8MB

• Formats: JPEG, PNG, GIF

• Resolution: 1200x627px (recommended)

• Up to 9 images per post

Video Specs

• Max size: 5GB

• Duration: 3 seconds to 10 minutes

• Formats: MP4

• Resolution: 1080p (recommended)

• Frame rate: 23–60 fps

Text Specs

• Post: 3,000 characters max

• Article: 125,000 characters max

• Poll support

LinkedIn prioritizes professional content. Ensure media aligns with platform guidelines.

Google Business Profile

Image Specs

• Max size: 5MB

• Formats: JPEG, PNG

• Resolution: 720x720px (minimum)

• One image at a time

Video Specs

• Not supported via API

Text Specs

• Post: 1,500 characters max

Google Business Profile has limited API support for media. Use native options for videos.

Pinterest Publishing

Image Specs

• Max size: 32MB

• Formats: JPEG, PNG

• Resolution: 1000x1500px (recommended, 2:3)

• Aspect ratio: 2:3 or 1:1

Video Specs

• Max size: 2GB

• Duration: 4 seconds to 15 minutes

• Formats: MP4, MOV

• Resolution: 1080x1920px (recommended, 9:16)

• Frame rate: 24–60 fps

• Premium plans: Enhanced video upload limits

Text Specs

• Title: 100 characters max

• Description: 500 characters max

Pinterest Pins require high-quality, vertical visuals for optimal engagement.

Reddit Publishing

Image Specs

• Max size: 5MB

• Formats: JPEG, PNG

• Resolution: 1080x1080px (recommended)

Video Specs

• Max size: 1GB

• Duration: Up to 15 minutes

• Formats: MP4, MOV

• Resolution: 1080p (recommended)

• Premium plans: High-quality video support

Text Specs

• Title: 300 characters max

• Text with media ignored via API

Reddit’s API prioritizes media-only posts. Text content is not supported.

Telegram Publishing

Image Specs

• Max size: 10MB

• Formats: JPEG, PNG

• Resolution: 1080x1080px (recommended)

• Up to 9 images per post

Video Specs

• Max size: 20MB

• Duration: Up to 60 seconds

• Formats: MP4, MOV

• Resolution: 1080p (recommended)

Text Specs

• Caption: 4,096 characters max

• Custom bot support

Telegram supports bot-driven publishing. Configure bot permissions correctly.

Blogger Publishing

Image Specs

• Max size: 15MB

• Formats: JPEG, PNG, GIF

• Resolution: 1600x900px (recommended)

Video Specs

• Max size: 100MB

• Formats: MP4, MOV, AVI

• Resolution: 1080p (recommended)

• Premium plans: High-quality video uploads

Text Specs

• No strict character limit

• Supports HTML formatting

Blogger supports rich media content. Ensure video sizes comply with platform limits.

RSS Feed Publishing

Text Specs

• Title: 255 characters max

• Description: No strict limit

• Supports HTML

Media Specs

• Images: JPEG, PNG (via enclosure)

• Videos: MP4 (via enclosure)

• No strict size limits

RSS feeds require valid feed URLs for automatic publishing.

WordPress Publishing

Image Specs

• Max size: 25MB

• Formats: JPEG, PNG, GIF

• Resolution: 1920x1080px (recommended)

Video Specs

• Max size: 100MB

• Formats: MP4, MOV

• Resolution: 1080p (recommended)

• Premium plans: Enhanced video integration

Text Specs

• No strict character limit

• Supports HTML and categories/tags

WordPress supports self-hosted sites. Ensure API access is configured.

Bluesky Publishing

Image Specs

• Max size: 1MB

• Formats: JPEG, PNG

• Resolution: 1080x1080px (recommended)

• Up to 4 images per post

Video Specs

• Max size: 50MB

• Duration: Up to 60 seconds

• Formats: MP4

• Resolution: 1080p (recommended)

• 25 uploads per day

Text Specs

• Max length: 300 characters

• Supports user tagging

Bluesky enforces strict daily upload limits. Plan content accordingly.