What is the primary text limit on a Facebook ad?

Facebook recommends keeping primary text to 125 characters so it does not truncate on mobile. The headline limit is 40 characters and the description 30 characters for best display.

What size should a Facebook single image ad be?

A single image ad uses 1080×1080 px (1:1) or 1080×1350 px (4:5) for feed placements. The recommended minimum width is 600 px and the file should stay under 30 MB.

What are the specs for a Facebook carousel ad?

Each carousel card is 1080×1080 px (1:1) with 2 to 10 cards. Headline limit is 40 characters per card, primary text 125, and each image must be under 30 MB.

What is the maximum file size for a Facebook video ad?

Facebook video ads can be up to 4 GB. Recommended resolution is at least 1080×1080 px, with H.264 compression, square pixels and AAC audio for best quality.

Does the old 20% text rule still apply to Facebook ad images?

Facebook removed the hard 20% text-in-image rule in 2020, but images with heavy text can still see reduced reach. Keep overlay text minimal for best delivery.

Facebook Ad Spec Reference

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This reference puts every Facebook ad placement spec in one place — exact pixel dimensions, aspect ratios, file-size caps and the character limits for primary text, headline and description. Pick a format and the tool shows you everything you need to build creative that passes review and displays without truncation.

How it works

Facebook publishes recommended creative specs per ad format. The tool stores these as structured data and renders the full spec sheet for whichever placement you select. Image and video specs include the recommended resolution, simplified aspect ratio and maximum file size, while copy specs list the safe character limits for each text field.

Aspect ratios are shown in their simplest form (1080×1080 → 1:1, 1080×1920 → 9:16). The copy limits are the thresholds beyond which Facebook truncates text on mobile, so staying inside them keeps your message intact.

Tips

Keep primary text to 125 characters and headlines to 40 — anything longer risks a ”… See more” cut-off on mobile.
Export video as H.264 MP4 with square pixels and AAC stereo audio for the cleanest transcode.
Although the 20% text overlay rule is gone, image-heavy text can still depress reach — keep it light.