100% Private & Local

Shrink Your PDF
Without Giving Up Your Privacy.

Stop uploading sensitive documents to cloud servers. Compress your files instantly in your browser with our state-of-the-art WebAssembly engine.

Zero Server Processing: Your data stays on your machine. Always.

Select a PDF File for Local Processing

Files are processed entirely in your browser — nothing is uploaded to our servers.

Capabilities & Limitations

Best results on:

  • Image-heavy PDFs (scans, brochures, reports with photos)
  • Standard JPEG-embedded images

Little to no savings on:

  • Text- or vector-only PDFs
  • Images using JBIG2, JPEG 2000, CCITT, or Flate encoding (skipped for safety)

Cannot open:

  • PDFs with a User Password (AES-encrypted content) — the file will fail to load

Side effects to be aware of:

  • Print/edit restrictions (Owner Password) are removed during re-save
  • Document metadata (Author, Title, Producer) is stripped
  • Loses web-optimised byte ordering and PDF/A compliance

Zero-Server Processing

Your documents never leave your computer. We use your browser's internal power to optimize your files.

Smart Quality Presets

Choose from Email, Standard, or HD settings to get the perfect balance between file size and visual clarity.

Lightning Fast

Powered by multi-threaded WebAssembly, our compressor handles large files faster than tradition cloud upload tools.

Why Small Tools are the Future of PDF Management

Protecting Sensitive Data

When you use a generic PDF compressor online, you are handing over a decrypted, high-resolution copy of your document to a third-party server. For financial statements, medical records, or legal contracts, this is an unacceptable risk.

SimpleTool solves this by moving the entire optimization logic to your browser's memory.

Metadata Removal for Cleaner Files

Most people don't realize that PDFs carry hidden "footprints"—the name of the author, the exact date of creation, and even the software used to make it. Our "Standard" and "Email" presets automatically strip this metadata, giving you a clean, anonymous file for professional sharing.

How to Compress PDFs Efficiently

  1. Upload your document to the **Simple PDF Shrinker**.
  2. Select the **Email Friendly** option if you need to bypass file limits for Gmail or Outlook.
  3. Toggle **Greyscale Mode** if you are compressing a scanned document; it can reduce size by an additional 40%.
  4. Download your optimized file instantly.