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Resize & Compress Files

Reduce the file size of images (JPG, PNG) and PDFs. Control quality and dimensions. Nothing is uploaded anywhere.

compress

Drop your file here

JPG, PNG, WebP, or PDF

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lock

100% Private

Your files never leave your browser.

tune

Full Control

Adjust quality and dimensions yourself.

speed

Instant

No upload queue. Results in seconds.

How it works

Signvert's compress PDF online free tool reduces the file size of PDFs and images directly in your browser, with no server upload required. For images, you can adjust the output quality and maximum dimensions using simple sliders and see the estimated file size before downloading. For PDFs, the tool re-encodes embedded images at a lower quality to shrink the overall file size. The entire compression process runs locally using open-source libraries, keeping your documents completely private.

Who uses this tool

Freelancers and remote workers use a compress PDF online free tool to shrink large scanned documents before emailing them, avoiding attachment size limits imposed by email providers.

Web developers and content creators compress images before uploading them to websites or social media, reducing page load times without visibly degrading image quality.

Businesses preparing digital submissions for government portals, tender systems, or HR platforms compress PDFs to meet strict file-size requirements without paying for desktop software.

Frequently asked questions