Compress a PDF without uploading it
Too heavy to email or to upload to a portal? Shrink oversized images and unused data, keep the text sharp, and see the size before and after.
- Files never leave your device
- Text is truly deleted, not hidden
- Free, no account, no watermark
Choose a PDF Processed on your computer. Nothing is uploaded.
How to compress a PDF
Open your PDF
Drop it on the page. Its current size is shown.
Choose a level
Light, Recommended or Strong. Recommended suits screens and office printing.
Download
You see the new size and the percentage saved. If no saving is possible, your file is left unchanged.
What makes a PDF heavy
Almost always: images. A photo straight from a phone or a scan at 600 dpi contains far more pixels than a page needs. pdfanonym reduces each image to the resolution the page can actually display (about 220, 150 or 100 dpi depending on the level) and recompresses it. Fonts are trimmed to the characters actually used, and unused objects are removed.
What to expect
| Document | Typical result |
|---|---|
| Photos, scans in color, presentations | Large reduction, often 50 % to 90 % |
| Mixed reports | Moderate reduction |
| Text-only documents, files already optimized | Little or no change |
Text and vector drawings are never converted to images, so they stay perfectly sharp at any level.
Large files
Everything runs on your computer, so a 100-page scanned file can take a few seconds. There is no upload time and no size limit set by a server.
Questions people ask
Will compression reduce quality?
Light keeps images close to the original. Recommended is hard to tell apart on screen and in office printing. Strong shows visible loss on photos when you zoom in. Text is never affected.
Why did my file barely shrink?
It contains little image data, or its images were already compressed. In that case the tool tells you and keeps your file as it is.
Is there a size limit?
No limit is set by us; very large files depend on your computer's memory.
Other tools
Black & white
Convert a color PDF to grayscale and keep the text sharp and selectable.
PDF to JPG
Turn every page of a PDF into a JPG or PNG image.
JPG to PDF
Combine photos and scans into one PDF, in the order you choose.
Redact PDF
Black out names, numbers and sensitive passages. The text under the box is deleted.
Anonymize PDF
Detect emails, phone numbers, IBANs and names automatically, then redact them in one click.