Compress PDF
Shrink PDF size by re-packing and optimising it, right in your browser.
Runs on your device · no upload
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About Compress PDF
Compress PDF re-packs your document and strips unused data to make the file smaller, without uploading it anywhere. It works best on PDFs with redundant structure; image-heavy scans may shrink less.
Add your PDF
Choose a file from your phone or computer. It never leaves your device.
Adjust and run
Pick your options, then tap the main button.
Download
Save the result. No watermark, no sign-up.
Frequently asked questions
How much can a PDF be compressed?
It depends on the file. PDFs with a lot of unused data shrink the most; PDFs that are mostly large images may change very little.
Will compressing reduce quality?
No. This method optimises structure and metadata without re-encoding your pages.
Are my files uploaded anywhere?
No. This tool runs in your browser, so your file stays on your device and is never sent to a server.