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Multi Platform Publishing Guide

Learn more about multi platform publishing guide in our help documentation.

Simplify Your Social Media Strategy

Effortlessly publish content across all platforms with Postly’s all-in-one solution.
We manage the complexities of media formatting, ensuring your images, videos, and text are optimized for each channel.
Save time, stay consistent, and share with ease.

Pro tip: Leverage Postly’s automation to streamline your workflow and enhance engagement across platforms.

Why Postly for Cross-Platform Publishing

Postly simplifies social media management by handling media optimization for you.
From resizing images to validating videos, we ensure your content meets platform-specific standards, allowing you to focus on creating compelling posts.

  • One-Click Multi-Platform Sharing: Publish images, videos, and text to all channels at once.
  • Automated Media Processing: We resize, reformat, and validate content to meet platform requirements.
  • Error-Free Publishing: Instant notifications and guided fixes ensure seamless posting.

Learn more about cross-platform publishing

Unlock unlimited high-quality uploads and advanced video features with Postly’s premium plans.

1. Image Auto-Fix: Flawless Visuals, No Effort

Postly’s Image Auto-Fix optimizes your images for every social platform.
We automatically adjust size, format, and compression, ensuring professional-quality visuals without manual work.

  • Supported Formats: JPEG, PNG, BMP, TIFF, WebP, SVG, HEIF, RAW, ICO
  • Platform-Specific Resizing: Optimized for TikTok, Instagram, LinkedIn, Twitter, and more
  • Live Previews: Review and tweak images before publishing

Learn more about Image Auto-Fix

Ensure images meet platform size limits to avoid issues.
Postly alerts you if manual adjustments are needed.

Image Auto-Fix FAQs

How does Image Auto-Fix streamline publishing?

It auto-adjusts images to fit each platform’s specs, eliminating manual resizing.

What if my image format isn’t compatible?

Postly converts unsupported formats or prompts you to replace them.

Can I see changes before posting?

Yes, the Preview feature lets you review images for each platform.

2. Video Validation: Hassle-Free Video Publishing

Postly’s Video Validation checks your videos to ensure they meet platform standards, preventing failed uploads or rejections.
We validate format, resolution, duration, and file size for smooth publishing.

  • Supported Formats: MP4, MOV, WEBM, AVI, and more
  • Comprehensive Checks: Validates resolution, aspect ratio, length, and size
  • Auto-Fixes: Adjusts videos automatically or guides you through manual fixes

Learn more about Video Validation

Videos exceeding platform limits (e.g., Twitter’s 140-second or TikTok’s 4GB cap) may need trimming or compression.
Postly provides actionable fix suggestions.

Video Validation FAQs

How does Video Validation improve publishing?

It ensures videos meet platform requirements, avoiding errors or delays.

What if my video doesn’t comply?

Postly alerts you with steps to trim, compress, or reformat the video.

Can I preview videos?

Yes, you can preview how your video appears on each platform before posting.

3. Platform-Specific Content Guidelines

Postly ensures your content complies with each platform’s unique requirements.
Here’s a breakdown of key specs per platform:

TikTok

  • Video: Up to 4GB, max 10 minutes, 1080×1920px, MP4, MOV, WebM
  • Text: Captions up to 150 characters
  • Images: Direct image posting not supported

Note: Vertical videos are essential for TikTok engagement

YouTube

  • Video: Up to 128GB, max 12 hours, 240p to 4K, or vertical videos (Shorts)
  • Text: Titles up to 100 characters, descriptions up to 5,000 characters
  • Images: Thumbnails 1280×720px, JPG, PNG, BMP, GIF

Note: Use high-resolution thumbnails for better click-through rates

Facebook

  • Video: Up to 10GB, max 4 hours, 1080p in landscape, square, or vertical
  • Images: Up to 8MB, 1080×1080px, JPEG, PNG, GIF
  • Text: Posts up to 63,206 characters

Note: Use vertical formats for Reels and Stories

Instagram

  • Video: Up to 4GB, 3 seconds–15 minutes, 1080×1080px square or 1080×1920px vertical
  • Images: Up to 8MB, 1080×1080px square, 1080×1350px vertical, JPEG, PNG
  • Text: Captions up to 2,200 characters, up to 30 hashtags

Note: Strict vertical aspect ratios required for Reels and Stories

Twitter (X)

  • Video: Up to 512MB, max 140 seconds, 1280×720px, MP4, MOV
  • Images: Up to 5MB, 1200×675px, JPEG, PNG, GIF
  • Text: Up to 280 characters (supports threads and polls)

Note: Premium plans optimize Twitter video uploads

LinkedIn

  • Video: Up to 5GB, 3 seconds–10 minutes, 1080p, MP4
  • Images: Up to 8MB, 1200×627px, JPEG, PNG, GIF
  • Text: Posts up to 3,000 characters; articles up to 125,000 characters

Note: Align tone with LinkedIn’s professional standards

Pinterest

  • Video: Up to 2GB, 4–15 minutes, 1080×1920px vertical, MP4, MOV
  • Images: Up to 32MB, 1000×1500px, JPEG, PNG
  • Text: Titles up to 100 characters, descriptions up to 500 characters

Note: Vertical visuals drive higher Pinterest engagement

Additional Platforms

  • Google Business Profile:
    Images up to 5MB, 720×720px minimum, JPEG, PNG. No video support via API.
  • Reddit:
    Videos up to 1GB, 15 minutes, 1080p. Images up to 5MB, 1080×1080px.
  • Telegram:
    Videos up to 20MB, 60 seconds, 1080p. Images up to 10MB, 1080×1080px.
  • Blogger:
    Videos up to 100MB, 1080p. Images up to 15MB, 1600×900px.
  • WordPress:
    Videos up to 100MB, 1080p. Images up to 25MB, 1920×1080px.
  • Bluesky:
    Videos up to 50MB, 60 seconds, 1080p. Images up to 1MB, 1080×1080px.
  • RSS Feeds:
    JPEG, PNG, MP4 via enclosure, no strict size limits.

Learn more about other platforms

Postly’s API-driven approach ensures compliance with platform guidelines, reducing errors and increasing reach.

Start Publishing with Postly

Ready to simplify your social media strategy?
Join Postly today and let us handle the media management, so you can focus on creating impactful content.

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