Choose a PDF and a compression mode. Everything runs in your browser — your file is never uploaded, and we always show you the honest before/after size.

Choose a PDF file or drag & drop here

Optimize (lossless)Re-saves the PDF with object streams. Page content and text stay exactly as they are; savings are usually modest. Strong (much smaller)Re-renders every page as a JPEG image and rebuilds the PDF. Biggest savings, especially for scanned or image-heavy PDFs.

Heads up: Strong mode converts text into images, so the result is no longer searchable or selectable, and fine detail can soften. Use Optimize if you need your text to stay real text.

UNDERSTAND YOUR RESULTS

Compress PDF guide

Compress PDF: Choose a PDF and a mode: Optimize re-saves it losslessly with object streams; Strong re-renders every page as a JPEG image at the chosen quality and rebuilds the PDF.

How to use this tool

Choose a PDF and a mode: Optimize re-saves it losslessly with object streams; Strong re-renders every page as a JPEG image at the chosen quality and rebuilds the PDF.
Check the displayed feedback and compare the result with your original input.
Copy or download using the tool’s controls. Keep your original until you have checked the output.

A worked example

Shrink a scanned contract with Strong mode before emailing it.

How it works

Choose a PDF and a mode: Optimize re-saves it losslessly with object streams; Strong re-renders every page as a JPEG image at the chosen quality and rebuilds the PDF.

Frequently asked questions

What should I check before using the output?

Optimize savings are usually modest and can occasionally produce a larger file. Strong mode converts text to images, so the text is no longer selectable or searchable.

What if a file or action is unsupported?

Check the input format and any visible error, try a smaller test case, and confirm the browser supports the required feature. Do not treat an empty output as a successful result.