Reduce your PDF file size by removing unnecessary data, free, private and instant in your browser.
Drag & drop your PDF here
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Single PDF file · Processed entirely in your browser
PDF Compress reduces your file size by stripping out unnecessary metadata, whitespace and redundant objects, while keeping text, fonts and image quality unchanged. It runs entirely in your browser, so your PDF never leaves your device. Results vary by document, files with lots of structural overhead shrink the most. For image-heavy PDFs, optimise the images first for maximum reduction.
A big PDF is usually carrying weight it does not need — leftover metadata, duplicated fonts, unused objects and structural bloat that builds up as a document is edited and re-saved. This free online PDF compressor rewrites the file to drop that overhead while leaving the actual content untouched, so your text stays selectable, your fonts stay embedded and your images keep their original resolution. Because the whole thing happens inside your browser tab, the PDF is never uploaded to a server, which keeps sensitive documents like contracts, invoices and statements completely private.
How much you save depends on the file. Text-based and export-heavy PDFs often shrink noticeably, while PDFs that are mostly scanned images will only lose their structural overhead — for those, compressing the images before you export the PDF gives the biggest win. A smaller PDF is easier to email under attachment limits, faster to upload to portals and quicker to share over chat, and you can do it as many times as you like, on your phone or your laptop, with no signup and no watermark.
Reviewed by the ToolBrainy Team · Files are processed 100% in your browser · Last updated July 2026
Drag & drop or choose a single PDF file.
Click Compress PDF to optimise the file.
Save the smaller PDF and check the savings.
Compression runs locally, nothing uploaded.
Strip overhead to shrink your PDF.
Text and image quality stay intact.
No signup, no limits and no watermarks, ever.
Fit under inbox attachment limits.
Upload forms and portals more quickly.
Keep archives lean and tidy.
Serve lighter PDFs that load faster.
Send documents over chat with ease.
Trim oversized files before printing.
Results vary. PDFs with extensive metadata or redundant objects shrink more. Image-heavy PDFs may see minimal reduction.
No. This tool only removes structural overhead — text, fonts and image quality remain unchanged.
Never. All processing is done locally in your browser. Your PDF never leaves your device.
Yes, completely free with no signup, no limits and no watermarks.
No. The PDF compressor runs entirely in your web browser and works in Chrome, Firefox, Edge and Safari — nothing to download or install.
Yes. The tool works in mobile browsers on both Android and iPhone, so you can shrink a PDF directly from your phone.
This tool reduces size by stripping structural overhead like metadata and redundant objects, so PDFs that are mostly scanned images may barely shrink. For those, compress the images first, then run the PDF through the tool.
No. You can compress PDFs of any size, as many times as you like. Very large files just take a little longer depending on your device.