PDF Slim Tip Us
100% local — press F12 to verify

Compress PDF to 20KB online.

Free. No sign-up. Exactly 20KB — your files never leave your browser.

  • 100% Local ProcessingYour files stay on your device
  • Zero UploadsNo tracking, nothing leaves
  • Fast & EfficientSeconds, right in your browser
  • Free Batch ModeNo limits, no registration
How it works →

Drop your PDF here

or click to browse — multiple files = free batch mode

Target size:
Compress PDF Shrink any PDF to an exact target size — batch included → Merge PDF Combine multiple PDFs into one file, in your order → Split PDF Extract a page range, or split every page apart → PDF to JPG Turn every page into a high-quality image → JPG to PDF Images to PDF — merged, or one file per image → Rotate PDF Fix sideways or upside-down pages in one click → Watermark PDF Stamp CONFIDENTIAL, DRAFT or your own text on every page → Protect PDF Lock with a password and restrict printing or copying → Page Numbers Number every page — choose position and starting number → Organize PDF Reorder, delete or rotate pages visually → Clean Metadata Strip hidden author, software and date info from your PDF → What is a PDF? Learn the format — origins, features and how it works →
Privacy First

Your files never leave your device. Total privacy, guaranteed by design.

Lightning Fast

Processing happens instantly in your browser. No waiting, no queue.

Verifiable

Press F12 and watch the Network tab: zero uploads, every single time.

Always Free

Every tool, every batch, no hidden costs. Use unlimited.

How do we keep your files private?

Do you upload my files to a server?

Never. PDF Slim runs entirely in your browser — pages are rendered and re-encoded on your own device. Your files don't touch our servers for even a second.

How can I verify that myself?

Press F12 to open Developer Tools, click the Network tab, then compress a PDF. You'll see zero uploads. In fact, you can disconnect from the internet and compression still works.

Do you track me or use cookies?

No cookies, no tracking pixels, no analytics. There's nothing to sign up for and nothing stored about you — the only thing saved is a local counter of bytes processed on your own device.

Why compress to 20KB?

Why exactly 20KB?

Older corporate email gateways and government web forms occasionally still enforce a 20KB per-attachment cap. At 20KB a mostly-text PDF fits comfortably; PDF Slim gets you there by re-encoding pages and removing embedded metadata — no uploads, no sign-up.

Will my document still look good?

Some legacy corporate mail gateways and government forms still ask for files under 20KB.

Is it really free and unlimited?

Everything runs in your browser — your documents never leave your device.

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and counting — every byte stayed on a device like yours.