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PDF Compressor

Shrink your PDF file size for email, upload, or storage — free, instant, and no quality sacrifice.

✓ No Signup ✓ No Watermark ✓ Up to 60% Smaller ✓ 100% Private
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STEP 1

Upload Your PDF File

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Drag & Drop your PDF here

Any PDF — scanned, image-based, or text documents

Browse PDF
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Compression Level

🟢
Low
Best quality
~20% smaller
🟡
Medium
Balanced
~40% smaller
🔴
High
Max compression
~60% smaller

Compressing PDF...

✅ Compression Complete!

Original
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→
Compressed
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You saved — KB (—%)

How to Reduce PDF File Size Online — Free

Large PDF files are a daily frustration. Email attachments get rejected. Upload forms reject files over 5MB. Shared drives fill up fast. The fix is simple — compress your PDF before sending or uploading.

How does PDF compression work?

Most PDFs contain embedded images at full resolution. Compression works by re-rendering those images at a slightly lower resolution and applying better encoding. Text and vector graphics remain perfectly sharp — only raster images are affected.

When should I use High vs Low compression?

Use Low compression for important documents where visual quality matters — contracts, portfolios, or print-ready files. Use High compression when file size is the priority — email attachments, web uploads, or documents that will only be read on-screen.

How It Works

1

Upload your PDF — drop it in or browse your files.

2

Pick compression level — Low, Medium, or High based on your needs.

3

Download — see exactly how much space you saved, then download.

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Frequently Asked Questions

Typical results range from 20% to 60% reduction. PDFs heavy with images compress the most. Text-only PDFs may see 10–25% savings.

Text, fonts, and vectors remain perfectly sharp at all levels. Images are slightly re-compressed — on Low, the difference is nearly invisible. On High, images look slightly softer but text is still crisp.

No. All compression happens directly in your browser. Your PDF never leaves your device, ensuring complete privacy.

There is no limit we set. Very large files (100MB+) may be slower due to browser memory. For most documents under 50MB, compression takes just a few seconds.

Yes. Scanned PDFs are essentially image files inside a PDF container — they often compress significantly because the scan images can be re-encoded more efficiently.