How to Compress a PDF to Under 100KB Free (Without Losing Quality)

Open the free Compress PDF tool, load your file and start with Lossless, which repacks the document and strips metadata while keeping text selectable. If it is still over 100KB, switch to Balanced or Maximum, which re-render each page to JPEG at 150 or 96 DPI. Everything runs in your browser, so the document is never uploaded.

Available free in the United Kingdom, United States, Ireland, Canada, Australia and across the EU. Because files are processed in your own browser and never uploaded, no personal data crosses a border, which keeps use consistent with UK GDPR, EU GDPR and CCPA/CPRA expectations.

Frequently asked questions

Can I really compress a PDF to under 100KB without losing quality?

Sometimes. Lossless mode repacks the file and strips metadata with no visible change, and on text-heavy documents that is often enough. Scans usually need Balanced or Maximum, which re-render pages as images — genuinely lossy, but still readable.

Will the text still be selectable?

In Lossless mode, yes. Balanced and Maximum convert each page to a JPEG, so the text becomes part of the image and can no longer be selected or searched.

Is my document uploaded to a server?

No. Compression runs inside your browser using WebAssembly. The file never leaves your device, which matters because 100KB limits usually apply to identity and financial documents.

What if 100KB is still not enough?

Split the document into separate files, crop wide margins, or rescan in greyscale. A long document forced under 100KB will be unreadable however it is compressed.