Compress PDF

Genuinely shrink your PDFs using page-by-page image recompression. 100% private — files never leave your browser.

🔒 No Uploads ⚡ Real Compression 🆓 Completely Free

🎚️ Compression Level

🖼️ Low High quality, smaller savings ~20–40% off

⚖️ Medium Balanced quality & size ~40–65% off

📦 High Smallest file, lower quality ~65–85% off

⚠️ How it works: Each page is rendered to an image then re-encoded as JPEG at the chosen quality. This achieves real file-size reduction. Trade-off: text in the output will not be selectable or searchable (it becomes part of the image). Best for sharing and archiving.

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Click to upload or drag and drop your PDF here

Maximum size: 50 MB • PDF files only

Real Browser-Based PDF Compression

Unlike tools that only strip metadata, this compressor renders every page at pixel level and re-encodes it at your chosen quality — achieving genuine, significant file-size reduction entirely inside your browser.

🔒 100% Private

Files are processed in your browser and never touch our servers. Your documents stay completely confidential.

📉 Real Compression

Page-by-page JPEG re-encoding via pdf.js + pdf-lib — not just metadata stripping. Expect 40–85% size reduction.

🎚️ 3 Quality Levels

Choose Low, Medium, or High compression to balance visual quality against file size for your use case.

🆓 Free Forever

No watermarks, no file limits, no registration needed. All tools are completely free to use.

Frequently Asked Questions

Does compressing a PDF reduce quality?

Our Medium setting reduces file size by 40–65% with minimal visible quality loss. The High setting gives maximum compression but is best for sharing, not printing.

Is my PDF uploaded to a server?

Never. All compression happens inside your browser using JavaScript. Your file never leaves your device.

What is the maximum PDF size I can compress?

You can compress PDF files up to 50 MB. For larger files, consider splitting the PDF first using our Rotate & Split PDF tool.

Why is my compressed PDF larger than the original?

Some PDFs are already heavily optimised. Our tool will always keep the smaller of the two files, so you will never receive a file larger than your original.