X Post Preview — free online tool
You write a post for X, hit send, and only then notice the line break in a weird spot or the link card showing the wrong title. By then it's too late. We added a free tool that fixes that worry before it happens — X Post Preview — right in your browser.
What it does
You type your post and watch a pixel-perfect X mockup build itself in real time, exactly as it will appear in the feed. You can add an image or a link card to see how those sit, and flip between light and dark mode to check both looks. What you see is what your followers will see.
Nothing leaves your device
The whole thing runs inside your browser. Your text and your image stay on your computer — nothing is uploaded anywhere, nothing is saved, and you don't need an account.
How to use it
- Open X Post Preview and type your post in the box.
- Add an image or a link card if you want one, and switch between light and dark mode.
- When the preview looks right, copy your text and post it on X.
It's free with no limit. There are more small tools on the Apps page.