PrivatePDFKit

Compress PDF

Reduce PDF file size drastically. Perfect for job portals and email attachments.

Drop PDFs here, or browse

PDFs are compressed entirely on your device.

How to compress a PDF locally

1

Drag your PDF document into the upload box above, or click browse.

2

Choose a compression level depending on how small you need the final file to be.

3

Click Compress PDF and wait for the local engine to rasterize and shrink the document.

Frequently Asked Questions

Yes. There are no accounts, no watermarks, and no daily limits. Compress as many PDFs as you like, as often as you like.
No. Compression happens entirely inside your browser using a WebAssembly-powered engine running locally. Your files never leave your device, which makes this safe for private documents like bank statements and ID cards.
To achieve extreme file size reduction completely offline, this tool uses a "Rasterization" method. It takes a high-quality picture of every page and binds them into a new, smaller PDF. This flattens the text into an image, making it unselectable, but significantly reduces the file size.
Since everything runs in your web browser, the file size limit depends entirely on your computer's RAM and processing power. Most modern phones and computers can easily compress PDFs up to 50MB-100MB.

Ready to explore more tools?

Edit PDF

Add text, draw, overlay images, and insert signatures natively on any PDF.

Merge PDF

Combine multiple PDFs into one document, in the order you choose.

Split PDF

Extract specific pages from a large PDF document.

Unlock PDF

Remove passwords from encrypted PDFs locally and securely.

Redact PDF

Permanently black out sensitive text — destroyed, not just hidden.

Watermark PDF

Add a custom text stamp across every page of your PDF.

Image to PDF

Turn JPG and PNG images into a single, shareable PDF file.

Passport Photo

Generate a print-ready A4 sheet of standard passport photos.

Convert Image

Cross-convert between WebP, PNG and JPG — in bulk, with quality control.

Resize Image

Resize images to exact pixel dimensions without stretching.

Compress Image

Shrink JPG and PNG file sizes without losing visible quality.

Paste to Image Converter

Paste screenshots directly (Ctrl+V) and convert to PNG, JPG, WebP, or ICO.

Bulk Resize Image

Batch process up to 50 images at once. Scale dimensions proportionally or hit exact KB limits.

Remove Background

Remove image backgrounds automatically with on-device AI.