How to compress PDF to 100kb without uploading?

Use The PDF Mechanic's compressor tool. Select your file, adjust the slider to reduce quality slightly, and download. The processing happens locally on your device for maximum privacy.

Is it safe to compress sensitive documents?

Yes, absolutely. Unlike other sites, we do not upload your files to any server. All compression is done directly in your browser using JavaScript.

Compress PDF Online | Reduce Size Securely

Click or Drag PDF here

Max file size: 50MB (Processed Locally)

How to Compress PDF Files?

1. Select File

Upload your PDF document. Your file stays on your device.

2. Choose Quality

Use the slider to balance between file size and image clarity.

3. Download

Click compress and download your optimized PDF instantly.

Why use this Compressor?

Most online compressors upload your file to a server. The PDF Mechanic is different. We render your PDF pages into optimized images right inside your browser. This means:

No data upload (100% Private)
Works without Internet
No daily limits

FAQ

Why did the text become an image?

To achieve maximum compression securely in the browser, we convert pages to optimized images. This drastically shrinks file size but disables text selection.

Is there a file size limit?

We recommend files under 50MB because the processing happens on your device's RAM. Larger files might slow down your browser.