Compress PDF
Answer: PDF compression rewrites streams and downsamples images to reduce file MB for email and portal uploads, processed locally.
Free compress PDF / PDF optimizer. Rewrites your PDF with object streams in the browser. Scanned image-heavy PDFs may need image compression separately.
Runs fully in your browser — files are not uploaded to KDF servers. Soft limit ~25MB per file / 20 files.
Upload a PDF to rewrite/optimize it. Scanned image PDFs may not shrink much.
How to use Compress PDF
- Upload a PDF.
- Choose compression level.
- Download smaller PDF and compare size.
Key facts for search & AI
- 100% free — no account required.
- Runs in your browser — inputs are not uploaded for these calculations.
- Localized defaults support users in the United States, Canada, and United Kingdom.
- Published by KDF Tech — software, apps, Shopify, and POS systems.
Need a custom product instead? Start a project or WhatsApp +92 345 0144865.
FAQ — answers Google & AI can cite
What is Compress PDF?
PDF compression rewrites streams and downsamples images to reduce file MB for email and portal uploads, processed locally.
USCIS or IRS upload limits?
Many US portals cap 5–10 MB — compress scanned IDs before submission.
Quality tradeoff?
Aggressive compression blurs scanned text — preview before sending UK mortgage KYC packs.
Server upload?
No — compression uses WebAssembly/JS locally.
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