Compress PDF Online — Free
Make your PDF files smaller without quality loss. Instantly compress scanned PDFs, reports, and presentations for email and portal uploads.
PDF files grow large quickly — a scanned 20-page document can easily reach 40–80MB. Most email services cap attachments at 25MB and government portals impose even stricter limits. GenZDoc's PDF compressor removes redundant metadata, re-compresses embedded images, and strips unused font data, reducing file sizes by up to 70% while the text and visuals remain crisp and readable. The entire process runs in your browser, so your confidential documents are never sent to any external server.
How it works
Select your file securely from your local device.
Your browser instantly performs the operation securely.
Save the fresh file directly to your secure device.
Frequently Asked Questions
How much can you compress a PDF?
Depending on the content, typically 40–70%. Scanned PDFs with high-resolution images compress the most. Text-only PDFs compress less since the text is already small.
Will compressing a PDF ruin the quality?
No for text. There may be minor quality reduction in embedded images if you choose aggressive compression, but our default "balanced" mode keeps images visually perfect.
Can I compress a password-protected PDF?
Not directly. First use our Unlock PDF tool to remove the password, then compress the unlocked version.
Is this safe for confidential documents?
Yes. GenZDoc processes PDFs entirely in your browser. No data is ever uploaded to our servers, making it safe for contracts, tax documents, and medical records.