Compress PDF
Upload a PDF to compress
? Frequently Asked Questions
How much can PDFs be compressed?
Compression varies by content: image-heavy PDFs can reduce 50-80%, text-heavy PDFs 10-30%. Results depend on existing compression, image quality settings, and whether you choose lossy or lossless compression.
What compression methods are used?
Methods include image compression (reducing photo quality), removing duplicate content, optimizing fonts, discarding thumbnails/metadata, and flattening layers. Combined, these significantly reduce file size.
Will compression affect print quality?
High/medium compression maintains print quality for most uses. Aggressive compression reduces image quality, which may be noticeable in high-resolution prints. Test compressed PDFs before printing important documents.
Can I compress password-protected PDFs?
You must unlock the PDF first (if you have the password) before compressing. Some tools can compress while maintaining encryption, re-encrypting the compressed version with the same password.
Does compression remove any content?
No visible content is removed. Compression removes redundant data, thumbnails, and metadata. Some interactive elements (JavaScript, 3D content) might be removed in aggressive compression modes.
Is my data safe and secure?
Yes, absolutely! This tool runs entirely in your browser. All data processing happens locally on your device - nothing is uploaded to our servers. Your files and data never leave your computer, ensuring complete privacy and security.