Best Free PDF Tools

Home

/

PDF Tools

/

Compress PDF

Compress PDF

Reduce PDF file size honestly with lossless structural optimization and image downsampling.

or drag & drop PDFs here

Your files stay on your device. Nothing is uploaded.

Compress PDF shrinks file sizes so documents are easy to email and upload. We provide two honest compression methods: Recommended (Lossless Structural) which optimizes object streams and cleans unused resources without altering visual fidelity, and Strong (Image Downsampling) which optimizes embedded bitmap graphics.

Honest sizing metrics

We show exact before-and-after byte counts. If a document is already well-compressed and cannot be reduced further without severe degradation, our tool tells you clearly instead of displaying fabricated savings percentages.

Your files never leave your device
No sign-up. No login.
Free, works in any modern browser

How to use this tool

  1. Select or drop your PDF: Choose the files from your computer, phone, or tablet. Your document is read immediately into memory.
  2. Configure options: Arrange files, set page ranges, pick rotation angles, or choose compression presets.
  3. Process on your device: Click the action button. The browser Web Worker executes the changes with zero network transmission.
  4. Download result: Save your finished PDF or ZIP archive immediately.

Key features & safety guarantees

Total confidentiality

No third party, including our servers, ever accesses your files. Full privacy compliance by physical design.

Blazing performance

No network bottlenecks or queue delays. Runs instantly at native browser execution speeds.

Common questions

Will the quality of my document be affected?

For merge, split, rotate, and organize tasks, page content and vectors are preserved losslessly. For compression, you have full control over structural optimization versus image downsampling.

Can I cancel processing if I change my mind?

Yes. You can hit Cancel at any time to immediately terminate the worker and clear all buffered data from memory.

Related PDF tools

Merge PDF

Combine multiple PDF files into one clean document.

Split PDF

Separate PDF pages or extract custom page ranges.

PDF to JPG

Export crisp JPG images from every PDF page.

Add Bates Numbers

Apply sequential legal Bates numbering to pages.