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Drag and drop your PDF file into the upload zone above.
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Compress PDF
Reduce PDF file size for uploads, email attachments, and form submissions — processed securely in your browser.
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How it works
Select Quality
Choose your desired balance between file size and quality.
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Get your optimized PDF instantly. Files are never stored.
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Frequently asked questions
Yes. Compress PDF is completely free with no sign-up, watermark, or daily limit — compress as many files as you need.
You can choose a compression level that balances file size and quality. Text and vector content stay sharp, while images are optimized to shrink size with minimal visible loss.
Yes — your file is processed entirely in your browser using WebAssembly. It is never uploaded to a server, so confidential documents stay private.
Because compression runs locally in your browser, the practical limit depends on your device's memory rather than a fixed server cap — most PDFs up to several hundred MB compress smoothly.
Yes, you can queue several PDFs and compress them in a batch, then download each compressed file individually.