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Compress PDF — Free Online
Compress PDF reduces the file size of your PDF so it is easier to email, upload or store, while keeping the document readable. It runs locally in your browser.
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✓ 100% free
✓ No sign-up
✓ No file upload
✓ Works in your browser
How to Compress PDF
- 1Open the Compress PDF tool and add your PDF.
- 2Pick a compression level (recommended for the best balance).
- 3Click Compress to shrink the file.
- 4Download your smaller PDF.
Open Compress PDF tool →
Why use Compress PDF?
Smaller PDFs upload faster, fit email size limits and use less storage, while the recommended level keeps text and images clear.
Common use cases
- Shrink a scanned PDF to attach it to an email under 25 MB.
- Reduce a portfolio so it loads quickly on a website.
- Save space when archiving hundreds of documents.
Tips
- Start with the recommended level and only go higher if needed.
- Image-heavy PDFs compress the most.
Frequently asked questions
How can I reduce PDF size without losing quality?
Choose the recommended compression level in the Compress PDF tool for a strong size reduction while keeping good visual quality.
Is the PDF compressor free?
Yes, compressing PDFs is free with no limits.
Will my file be uploaded?
No. Compression runs in your browser, so your PDF never leaves your device.