AI that sounds like your brand, not a robot
Enter your brand’s information, tone of voice, key messages and style guide once. The AI is trained on it, so every caption and content idea reads like you wrote it.
Free Facebook Post Preview Tool
Upload your image, write your caption and see your post rendered as a real Facebook news feed post before you publish. No account, no cost.
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What is a facebook post preview tool?
A Facebook post preview tool renders your image and caption inside a mock news feed post so you can check the image crop, where the caption truncates behind "See more", and how your page name and profile picture appear. Use it before publishing to catch layout problems no scheduling tool shows you.
From the makers of this free tool
Create, approve and schedule social media posts with Content Manager
This preview tool is part of Content Manager, an AI social media management platform for marketing agencies, freelancers and in-house teams. It combines a brand-trained AI copywriter, a content calendar, a client approval portal and one-click scheduling in one place.
- users
- 50+
- posts created, approved & scheduled
- 1,000+
- hours saved
- 300+
Branded AI copywriter for social media captions
Upload an image and add a few notes. Content Manager writes platform-ready captions tailored to that image and your brand voice, then lets you remix or edit them before you schedule.
Never stare at a blank content calendar again
Stuck on what to post? Generate post ideas instantly, matched to your business, the season and upcoming events. Writer’s block becomes a thing of the past.
One-click scheduling to every platform
Publish to Facebook, Instagram, LinkedIn, Twitter/X, TikTok, YouTube and Threads from one calendar. Spend less time posting and more time creating.
- Twitter/X
- TikTok
- YouTube
- Threads
A live, shared content workspace with your clients
The client portal gives you and each client a two-way workspace that updates in real time. Share the content calendar, collect feedback and approvals, and receive the client’s own photo uploads, without losing anything in an email chain.
Handle more clients without hiring more staff
Every client gets a dedicated dashboard with upcoming posts, approval status, recent activity and their brand details, so you can manage more accounts with the same team.
Spend less time on social media admin
Generate on-brand content for every client, schedule across every platform and get approvals done, all in one place.
Why preview a Facebook post before publishing?
Facebook rarely shows your image the way you designed it. Landscape images get letterboxed on mobile, square images dominate the feed, and anything taller than 4:5 is cropped. Captions are cut off at roughly 125 characters, so a hook buried in the second sentence is invisible to most people scrolling past. Previewing takes ten seconds and catches all three problems before the post is live — or worse, before a client sees it published wrong.
What this Facebook preview shows you
- Page identity — Your business name and logo in the position and size Facebook renders them, so you can check a logo that gets cropped inside the circular avatar.
- Caption truncation — Where your text stops and the "See more" link takes over, so your hook lands above the fold.
- Image crop — How your uploaded image is fitted into the feed container at Facebook’s aspect ratio.
- Engagement bar — The Like, Comment and Share row underneath the post, so mockups you send clients look like the real thing.
- Ad format toggle — Switch to advert mode to add a headline, a call-to-action button and the Sponsored label.
How to preview a Facebook post
Enter your business name and upload your logo on the left. Upload the post image and paste your caption in the middle column. The preview on the right updates live. Toggle between Organic and Advert to check both formats, and use the Share button to send a client a link to the mockup without giving them an account.
Facebook post specs at a glance
| Landscape / link image | 1200 × 630 px (1.91:1) |
|---|---|
| Square image | 1080 × 1080 px (1:1) |
| Portrait image | 1080 × 1350 px (4:5) |
| Caption truncation | Around 125 characters before "See more" |
| Maximum caption length | 63,206 characters |
| Recommended file type | JPG or PNG, under 30 MB |
Frequently asked questions
How long can a Facebook post caption be?
A Facebook post can technically contain up to 63,206 characters, but only around 125 characters show in the feed before the text is collapsed behind a "See more" link. Put your hook and any call to action in the first line.
What image size should I use for a Facebook post?
Use 1200 × 630 px for landscape or link posts, 1080 × 1080 px for square, and 1080 × 1350 px for portrait. Portrait 4:5 takes up the most vertical space in the mobile feed, which is why it usually performs best for organic reach.
Can I preview a Facebook post without a Facebook account?
Yes. This tool renders a mock Facebook feed post in your browser from the image and caption you provide. You do not need to log in to Facebook, connect a page, or create a Content Manager account.
Are my images stored or published anywhere?
No. Your image and caption stay in your browser while you build the preview and nothing is posted to any social network. A preview is only stored on our servers if you click Share, which creates a private link you can send to a client or teammate.
Is the preview tool really free?
Yes. The social media post preview tool is free and requires no account, no credit card and no sign-up. Nothing you upload is published anywhere. Content Manager is the paid product behind it — a social media management platform for agencies — but the preview tool works on its own.
Preview your post on other platforms
Want to generate and schedule content too?
This preview tool is a free standalone feature of Content Manager — an AI-powered platform built for marketing agencies. With a full account you can generate brand-trained captions using AI, schedule posts across every platform, manage multiple clients from a shared workspace, and get content approved through a built-in client portal. No more copy-pasting between tools.