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Compress images for LinkedIn ads.

Drop your photos and download them under 5 MB, the file-size limit in LinkedIn ads's image rules. The quality is lowered first and the pixel dimensions only when needed; the photo is never cropped. It runs in your browser; nothing is uploaded.

Black-dial watch with a mesh strap on white, three-quarter view
Source photo: Plain product photo. Made with Herofab · Packshot studio
Free tool · first use without sign-up

Under 5 MB per image, saved as JPG

Limits come from each platform's own help pages, summarised in the guides (checked 24 September 2026).

LinkedIn single image ads take JPG, PNG or GIF up to 5 MB, 1,200 × 628 pixels recommended at 1.91:1; carousel ads use 2–10 square cards.

Limit used
Under 5 MB per image, saved as JPG
Pixels kept
The rules checked here state no minimum pixel size, so the tool stops before the photo falls under a quarter of its original width.
Formats
Single image ads: JPG, PNG or GIF; carousel ads: JPG or PNG; document ads: PDF, DOC, DOCX, PPT or PPTX
File size
Single image ads 5 MB; carousel ads 10 MB maximum; document ads 100 MB
Aspect ratio
Single image ads: 1.91:1 (horizontal, desktop and mobile), 1:1 (square, desktop and mobile) or 1:1.91 (vertical, mobile only)
Free tool · first use without sign-up

Herofab free tools continue with a free account

The first use of each tool runs without sign-up. From the second use, the tools run with a free Herofab account; files are still processed in the browser and are not uploaded. This way, every free tool remains available with no usage limit.

Questions

Compressing for LinkedIn ads, answered.

What is the image file-size limit on LinkedIn ads?

5 MB per image, according to the rules summarised in the LinkedIn ads guide. This tool saves each photo as a JPG under that size.

Is JPG accepted on LinkedIn ads?

Yes. The formats LinkedIn ads lists are JPEG, PNG, and GIF.

Does compressing for LinkedIn ads change the pixel size?

Only when lowering the quality is not enough to get under 5 MB. The rules checked here state no minimum pixel size, so the tool stops before the photo falls under a quarter of its original width.

Where do these figures come from?

From LinkedIn Ads Guide — Single Image Ads Specifications; Carousel Ads Specifications; Document Ads Specifications; Text Ads Specifications; Conversation Ads Specifications; Event Ads Specifications, read on 12 October 2026. Marketplaces update their rules; the official page is the final reference.

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