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Mock up a Facebook ad in your browser

Add your image and text and see a Facebook feed ad or Page post with the Page name, “Sponsored” label, “See more” fold, headline and button, on a mobile or desktop layout. Download it as a PNG for a client or a team. Nothing is uploaded: it is all drawn in this tab.

How it works

1Choose ad or post
Pick an ad (with the “Sponsored” label, headline, description and button) or a plain Page post, and a mobile or desktop feed. Then add your image: 1:1, 4:5 or 1.91:1.
2Write the text
Fill in the Page name, the primary text, the headline, the description and the website shown. Pick a button name. Counters show how your text compares with Meta’s guide.
3Set the “See more” fold
Meta gives no cut-off, so you choose it: a number of lines or of characters. The tool shows what stays above the fold and what is hidden. Match it to your own feed.
4Download the PNG
The PNG is the preview itself, at three times the layout width: 1,170 px for mobile and 1,500 px for desktop, with the height following your text and image.

What Meta’s ads guide says about text and images

Meta’s ads guide for Facebook Feed image ads (opened 7 October 2026) lists the figures below. They are recommendations for ads, not rules for ordinary Page posts.

Item	What the guide says
Image ratio	4:5, with a 3% tolerance
Resolution	1440 × 1800 pixels
File	JPG or PNG, 30 MB at most
Minimum size	600 px wide; 750 px tall for a 4:5 image
Primary text	50 to 150 characters
Headline	27 characters

The guide adds that primary text over 50 single-byte characters, and a headline over 27, is allowed but may be truncated. The counters in the tool use those numbers. They are what Meta says is safe, not where the feed cuts: a long primary text is allowed, and the feed folds it behind “See more”.

Where “See more” cuts, and what is approximate

We could not find a page where Meta states how many lines or characters of a post or ad the feed shows before “See more”. So the fold in this tool is a setting, not a fact: choose lines or characters, and move the slider until it looks like your own feed. It starts at 3 lines on mobile and 5 on desktop, which are our estimates, and the page labels them approximate.

Keep the important part above the fold whatever the exact cut is: the offer, the price, or the word people should comment. Put the detail after it. If you want people to comment a keyword on the post, say so in the first lines, because that is the part everyone reads.

The button names

The button list comes from the call-to-action types in Meta’s Marketing API reference (Graph API v26.0, opened 7 October 2026). The tool shows eleven of them, with friendly names: Learn more (LEARN_MORE), Shop now (SHOP_NOW), Sign up (SIGN_UP), Book now (BOOK_NOW), Get quote (GET_QUOTE), Download (DOWNLOAD), Apply now (APPLY_NOW), Contact us (CONTACT_US), Send message (MESSAGE_PAGE), Order now (ORDER_NOW) and Subscribe (SUBSCRIBE), plus no button.

These are our labels, not a copy of Facebook’s wording. The same reference says not every type can be used for every ad: which buttons you can pick depends on the campaign’s objective, so check the real choices in Ads Manager. The tool draws no Facebook logos, uses icons made for it, and marks the picture as a mock-up. For the final check, use the preview in Meta’s Ads Manager.

Sources, and what we could not confirm

Meta Ads Guide, Facebook Feed image ads (en-gb.facebook.com/business/ads-guide/update/image/facebook-feed), opened 7 October 2026: the ratio, resolution, file limits and the primary text and headline figures in the table above.
Meta for Developers, Ad Creative Link Data Call To Action (developers.facebook.com/docs/marketing-api/reference/ad-creative-link-data-call-to-action), Graph API v26.0, opened 7 October 2026: the call-to-action types behind the button names, and the note that not every type fits every ad.

We found no Meta page that gives where the feed cuts post or ad text, on mobile or desktop, so the fold is a setting and its starting values (3 lines on mobile, 5 on desktop) are our estimates. The layout, fonts and spacing are ours, not copied from Facebook.

Questions people ask

How long should Facebook ad primary text be?

Meta’s ads guide for Feed image ads lists 50 to 150 characters for primary text, and says text over 50 single-byte characters may be truncated. Longer text is allowed, and the feed folds it behind “See more”, so keep the point in the first lines.

Where does Facebook cut the text with “See more”?

Meta doesn’t publish a figure, and it varies by device and placement. The tool lets you choose a number of lines or characters and labels the cut approximate. Set it to match your own feed, then check the real ad in Ads Manager’s preview.

What image size should I use for a Facebook feed ad?

Meta’s guide recommends 4:5 at 1440 × 1800 pixels, a JPG or PNG up to 30 MB. The minimum is 600 pixels wide, and 750 tall for a 4:5 image. You can also try 1:1 and 1.91:1 here to compare how much of your picture each shows.

Is this a real preview from Facebook?

No. It is a mock-up drawn from scratch, close to how a feed looks but not an exact copy, with no logos. Use it to share an idea or check a layout. The final preview before you publish is in Meta’s Ads Manager.

Are my image and text uploaded?

No. They stay in this tab and the PNG is made on your device. Nothing goes to DMFast or any other server, and closing the page discards them.

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