PublishQ
PublishQ

Post Previewer

See exactly how your posts will look on Twitter, Instagram, LinkedIn, TikTok, and more before you publish. No signup required.

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Customize your display name and username for the previews.
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Platform Preview
See how your post will appear on selected platforms.
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Select accounts to see live preview

It is also a safe zone checker

A vertical post gets the app's interface painted over it: the username, the caption, the buttons, the progress bar. The usual way to check that is to download a safe zone template and line it up in a design tool. The problem is that no platform publishes those numbers any more, and TikTok says outright that the area shrinks as your caption grows. Put your own frame and your own caption in here instead and you can see what is covered.

Instagram Reels safe zone checkerInstagram Stories safe zone checkerTikTok safe zone checkerTikTok carousel safe zone checkerFacebook Reels safe zone checkerFacebook Stories safe zone checkerYouTube Shorts safe zone checker

Or start at the social media safe zone checker and pick the format there.

Character & media limits for every platform

Every social network enforces different limits. Here's what you need to know.

XX (Twitter)
  • Post: 280 chars (25,000 Premium)
  • Photos: up to 4
  • Video: 1, max 512 MB
  • GIF: 1, max 15 MB
  • Poll: 2–4 options, 25 chars each
InstagramInstagram
  • Caption: 2,200 chars
  • Hashtags: max 30
  • Mentions: max 20
  • Carousel: up to 10 items
  • Reels: max 15 min
FacebookFacebook
  • Post: 63,206 chars
  • Album: up to 20 photos
  • Video/Reel: max 4 GB
  • Story: image or video
LinkedInLinkedIn
  • Post: 3,000 chars
  • Photos: up to 20
  • Video: 1, max 5 GB, 30 min
YouTubeYouTube
  • Title: 100 chars
  • Description: 5,000 chars
  • Tags: 500 chars total
  • Video: max 256 GB
  • Shorts: ≤3 min, vertical
TikTokTikTok
  • Video caption: 2,200 chars
  • Photo title: 90 chars
  • Photo description: 4,000 chars
  • Carousel: up to 35 photos
  • Video: max 4 GB
ThreadsThreads
  • Post: 500 chars
  • Carousel: up to 20 items
  • Video: max 1 GB, 5 min
  • Topic tag: 50 chars
BlueskyBluesky
  • Post: 300 chars
  • Images: up to 4, max 1 MB each
  • Video: max 100 MB, 3 min

PublishQ handles all of this for you: it warns you when you've hit a platform's limit and lets you override content per platform so each version fits perfectly. This works both in the app and programmatically via the API.

This tool is free, forever. No accounts, no paywalls, no catch.

I build these solo. If you want to support my work, donating a coffee would be highly appreciated! ☕

Frequently Asked Questions

Everything you need to know about Post Previewer from PublishQ

Yes, and it is more reliable than the templates people usually download for that. No platform still publishes pixel level safe zones, and TikTok says the area changes with your caption length and may differ by device. Since this previewer draws the real interface over your own media with your own caption on it, the covered area you see is yours rather than an average.
A social media post preview tool lets you see exactly how your post will look before publishing it. You can preview captions, images, videos, hashtags, and formatting for platforms like X (Twitter), Instagram, Facebook, LinkedIn, YouTube, TikTok, Threads and Bluesky. It helps you create perfectly formatted posts that look great everywhere.
Previewing your post helps you avoid layout issues, cropped images, and broken formatting. By using a post previewer, you can catch mistakes early and ensure your post looks professional across all social media platforms.
Yes! This is a completely free post preview tool — no sign-up, no credit card required. You can use it to preview unlimited social media posts directly in your browser.
You can preview posts for multiple platforms including X (Twitter), Instagram, Facebook, LinkedIn, YouTube, TikTok, Threads and Bluesky.
Absolutely. You can upload images or short videos to see exactly how they will appear in your social media feed. The tool simulates real platform behavior like image cropping, aspect ratios, and text truncation.
No. This tool is only for creating and previewing posts — it does not publish anything. If you want to schedule and automatically post to your social media accounts, you can use PublishQ, our full social media scheduler. Make an account for free!
No. Your content never leaves your browser. All previews are generated locally, which means your text, images, and videos remain private and secure.
Yes. The free Post Previewer works perfectly on mobile, tablet, and desktop browsers. You can create and check your post previews anytime, anywhere.
The previews are designed to match the real layouts of each platform. We regularly update the tool to reflect UI changes and post formatting rules from X (Twitter), Instagram, Facebook, LinkedIn, YouTube, TikTok, Threads and Bluesky and other networks for maximum accuracy.
Each platform has different character limits: X/Twitter allows 280 characters (25,000 with Premium), Instagram captions support 2,200 characters, Facebook allows 63,206 characters, LinkedIn supports 3,000 characters, TikTok video captions allow 2,200 characters (photo titles are 90 characters), Threads has a 500-character limit, Bluesky allows 300 characters, and YouTube titles are limited to 100 characters with descriptions up to 5,000 characters. The Post Previewer helps you stay within these limits before publishing.
Once your post looks good in the preview, focus on improving engagement with strong visuals, short captions, and relevant hashtags. You can also try PublishQ's free AI caption generator and post scheduler to boost your results.
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Alexandro - Founder
PublishQ

— me 👋

Hi, I'm Alexandro 👋

I left my Software Engineer role at Amazon to build tools that solve real problems — the kind big companies ignore because they read spreadsheets instead of using their own products.

I was spending over an hour daily just scheduling 2 shorts across 3 platforms — logging in, reformatting, uploading one by one. That felt broken. So I built PublishQPublishQ . Now I create 4 shorts in 3 minutes and schedule them to 4 platforms in under 30 seconds.

PublishQ is bootstrapped. No investors, no vanity metrics. I build what actually helps you — because I use it every day myself.

Thank you,

Alexandro

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see you inside ✨Start for Free →see you inside ✨Start for Free →see you inside ✨Start for Free →

Preview done. Now publish smarter.

Use PublishQPublishQ to create, preview, and publish — all-in-one platform. No more switching tabs.

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