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Multi Platform Publishing Guide

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

🚀 Publish Everywhere with Postly

One tool. Every platform. Perfectly optimized.

🌐 Why Multi-Platform Publishing Matters

Every social platform has its own identity - formats, tone, audience expectations, and media rules. What works on Instagram might flop on LinkedIn. A witty one-liner on X needs a more visual punch on Threads.

Postly was built to embrace this diversity.

With Postly, you can publish once and automatically tailor content to fit each platform’s specs - without switching tabs, reformatting media, or rewriting captions.

⚙️ What Postly Does for You

✅ One-Click Publishing
Push content to all your connected platforms - X, LinkedIn, Facebook, YouTube, Instagram, Threads, and more - with a single click.

✅ Smart Media Optimization
From image resizing to video format validation, Postly ensures your files are always compatible with platform-specific requirements.

✅ Preview + Auto-Fix
See how your content will look per platform and get instant fix suggestions for errors or limitations.

✅ Content & Style Guidance
Postly supports you with platform-specific character limits, tone prompts, and engagement tips so your post feels native - everywhere.

🧩 How to Achieve Seamless Cross-Platform Posting

  1. Connect Your Accounts
    Sync all your social and content platforms to your Postly workspace.

  2. Compose Your Post Once
    Write your caption, add your media, and let Postly handle the rest. You can customize per platform as needed.

  3. Post or Schedule
    Choose to publish instantly or schedule across multiple time zones, platforms, and formats.

  4. Review Auto-Fixes
    If your media doesn’t match the platform specs, Postly will offer suggestions or automatically optimize it.

  5. Track Performance (Coming Soon)
    Soon, you’ll be able to compare how your post performed across platforms.

✍️ Tagging and Mentions

Each platform handles tagging differently. Postly helps you apply tags and mentions correctly to boost engagement and ensure compatibility.

PlatformStatusNotes
Instagram✅ LiveMention @username
Threads✅ LiveMention @username
X (Twitter)✅ LiveMention @username
Bluesky🔜 Coming SoonMention @username
Facebook🔜 Coming SoonTag @PageName
LinkedIn🔜 Coming SoonTag @UserName or @PageName
YouTube🔜 Coming SoonMention @username in description

💡 Note: Postly automatically disables tags for unsupported platforms to avoid broken mentions. Learn more about Tagging and Mentions

🖼️ Image Auto-Fix

Postly’s Image Auto-Fix adjusts your visuals to meet every platform’s size, format, and compression needs - without lifting a finger.

  • Supported Types: JPEG, PNG, SVG, WebP, BMP, HEIF, RAW
  • Platform Tuning: TikTok, Instagram, LinkedIn, Twitter, Threads, and more
  • Live Previews: See image crops, padding, and aspect ratio tweaks per platform

Learn more about Image Auto-Fix

🎥 Video Validation

Publishing videos is tricky. File too big? Wrong resolution? Not anymore.

Postly validates and adjusts your video files to prevent failures.

  • Formats: MP4, MOV, WEBM, AVI
  • Checks: Aspect ratio, duration, resolution, size
  • Smart Fixes: Trim, compress, or reformat with guided help

Learn more about Video Validation

📏 Content Format Guidelines

Every platform has different rules. Here’s a quick guide to how Postly adapts for each:

🔹 TikTok

  • Video: Max 4GB, up to 10 minutes, 1080×1920px
  • Text: 150-character captions
  • Images: Not supported

🔴 YouTube

  • Video: Up to 12 hours or 128GB
  • Text: Titles (100 chars), Descriptions (5000 chars)
  • Thumbnails: 1280×720px

🔵 Facebook

  • Video: Max 10GB, 4 hours
  • Image: 1080×1080px
  • Text: Up to 63,206 characters

🟣 Instagram

  • Video: Max 4GB, Reels 3–90s
  • Image: Square (1080×1080px), Portrait (1080×1350px)
  • Text: Captions (2,200 chars), 30 hashtags max

⚫ Twitter (X)

  • Video: Max 512MB, 140s
  • Image: 1200×675px
  • Text: 280 characters

🔗 LinkedIn

  • Video: 3s–10min, up to 5GB
  • Image: 1200×627px
  • Text: Posts (3,000 chars), Articles (125,000 chars)

📌 Pinterest

  • Video: Max 2GB, 4–15 min
  • Image: 1000×1500px
  • Text: Title (100 chars), Description (500 chars)

📦 Additional Platform Specs

  • Google Business: Images only; no video API
  • Telegram: Short-form video (60s max)
  • Bluesky: Light specs for short videos and images
  • RSS Feeds: Embedded media via enclosure tags

Full Specs Library

🧠 Pro Tips

💡 Use the Preview Per Platform feature to tweak tone, hashtags, or links without rewriting from scratch.
🔓 Premium plans unlock advanced scheduling, bulk uploads, and enhanced video tools.

🚀 Get Started Today

Whether you're a creator, brand, or agency - Postly lets you create once and publish everywhere.

Spend less time managing platforms and more time growing your audience.

👉 Sign Up Now