About The PDF Compressor

The PDF Compressor reduces PDF file size using either a fast rewrite path or a raster compression path. It is useful when a PDF is too large for upload, email, support portals, or storage limits and you need a smaller downloadable copy.

Compression runs locally in your browser and exports a new PDF. Some already optimized PDFs may become larger, so always check the output summary.

How to Compress PDFs Online

1. Choose a PDF file.
2. Set the compression strength. In simple mode, the slider chooses practical mode, quality, and scale settings.
3. Open more options to override fast rewrite versus raster mode, JPEG quality, render scale, and metadata stripping.
4. Compress the PDF, review the size change and preview, then download the result.

Choosing Options Correctly

Fast rewrite:
Use this for a safer cleanup pass that preserves page content more directly and can strip metadata.

Raster mode:
Use this for scanned or image-heavy PDFs when stronger compression matters more than selectable text or perfect sharpness.

Common Use Cases

• Compressing a PDF before attaching it to email or a ticket.
• Reducing scanned or image-heavy pages with raster compression.
• Stripping metadata when preparing a redistributed copy.

Quick FAQ

What is the difference between fast rewrite and raster mode?
Fast rewrite tries to optimize the PDF structure. Raster mode redraws pages as images, which can reduce size but may soften text.

Can compression make a PDF larger?
Yes. Some PDFs are already optimized, and re-encoding can occasionally increase file size.

Will my original PDF be changed?
No. The compressed result is downloaded as a new file.

Is the PDF uploaded?
No. Compression is designed to run in the browser.