Is the PDF compressor free?

Yes, it is completely free with no limits. All processing runs locally in your browser.

How does the compression work?

The tool re-serializes the PDF using pdf-lib, which strips unnecessary metadata, removes duplicate objects, and optimizes the internal structure.

No. This is a lossless process that only removes overhead. Text, images, and layout remain identical.

No. All compression happens locally in your browser using pdf-lib. Your files never leave your device.

Reduce PDF file size by re-serializing and stripping metadata. Upload a PDF to get started.

Drop a PDF file here or click to browse

Step 1

Drop a PDF file or click to browse and select one.

Step 2

See the original file size displayed.

Step 3

Click Compress PDF to optimize the file.

Step 4

Download the compressed PDF and see the savings.

Reduce PDF file size with lossless optimization.

See original and compressed sizes with savings percentage.

Visual size comparison bar for easy understanding.

Fast client-side processing with pdf-lib.

100% private — your files never leave your browser.

: Yes, it is completely free with no limits. All processing runs locally in your browser.
: The tool re-serializes the PDF using pdf-lib, which strips unnecessary metadata, removes duplicate objects, and optimizes the internal structure.
: No. This is a lossless process that only removes overhead. Text, images, and layout remain identical.
: No. All compression happens locally in your browser using pdf-lib. Your files never leave your device.