Compress multiple PDF files at once. Reduce file sizes locally in your browser with 4 quality levels.
Drop PDF files here
Add multiple PDFs to compress them all at once.
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Add multiple PDFs to compress them all at once.
Drag in or select multiple PDF files from your device.
Select from Lossless, High Quality, Balanced, or Maximum compression.
Download each file individually or all at once as a ZIP archive.
Yes. OnePDFs is free to use, requires no account, and does not add an extra OnePDFs branding watermark; watermark tools add only the watermark you choose.
Your files stay on your device and are processed locally in your browser; no upload to our PDF processing service is required. The browser keeps the selected files in memory only until the page session ends.
There is no fixed percentage. Reduction depends on each PDF's image content and the selected level; the results list reports the measured before-and-after size for every file.
The Lossless level avoids image recompression. Other levels recompress images; vector text stays as text, while scanned text inside page images can become softer at stronger settings.
No hard limit. Files are processed one at a time in your browser to manage memory. You can compress as many as needed and download all results as a ZIP.