Free Compress PDF

Reduce the file size of your PDF document offline in your browser, keeping full visual quality.

Drag & drop a PDF to compress

or browse your files

Single PDF file up to 100MB

file.pdf

Compression Options

Select Compression Level

Recommended Compression Good quality, standard compression. Best for most PDFs. (150 DPI, 65% quality)

Extreme Compression Smallest size, lower image quality. Perfect for scanned text files. (96 DPI, 40% quality)

Low Compression High quality images, larger file size. Best for high-res graphics. (220 DPI, 85% quality)

File Size: 0 KB

Total Pages: 0

Your PDF is ready for compression

All processing happens entirely inside your browser. Your files are never uploaded to any server.

Free Offline PDF Compressor

Local Size Optimization

Optimize and compress PDF elements directly on your device. No files are uploaded, keeping your private business papers secure.

No Quality Loss

Our algorithm resizes images and compresses internal PDF objects efficiently, maintaining document readability and quality.

Full PWA Offline Support

Shrink and optimize your documents anywhere, anytime, without needing an active internet connection.

Frequently Asked Questions

How does offline PDF compression work?

PDFCraft runs optimization scripts inside your browser sandbox. It compresses images, cleans up duplicate objects, and adjusts quality settings locally using WebAssembly/Javascript without server support.

Are my files safe during compression?

Yes. Your files never leave your computer or phone, making PDFCraft the safest option for compressing corporate slides, legal briefs, and personal tax returns.

Can I compress password-protected PDFs?

To compress a password-protected PDF, you must first unlock it using our Unlock tool, and then run compression on the unlocked document.

How much can PDFCraft reduce my file size?

Compression ratios depend heavily on the content of the PDF. Files with large uncompressed high-resolution images see the biggest size reduction, while text-only documents may experience smaller changes.