Are my files uploaded?

No. Compression runs in your browser. Your files never leave your device.

What’s the difference between Condense and Photon?

Condense optimizes the PDF (object streams, metadata) and keeps text selectable. Photon turns each page into an image—best for photo-heavy or scanned PDFs—but text won’t be selectable and links won’t work.

Yes. All processing is client-side.

Does this work on mobile?

Yes. It runs in your browser on any device.

Compress PDF Online Free

Reduce PDF size with Condense or Photon, multiple levels, grayscale, and custom settings. One or more files. All processing happens in your browser. No uploads, no signup—your files never leave your device.

Drop your PDFs here, or click to choose files

Your files never leave your device. All processing happens in your browser.

How to use

Upload PDFs

Select one or more PDF files. You can add more or clear the list.

Choose algorithm & level

Condense keeps text selectable; Photon converts pages to images for photo-heavy PDFs. Pick a compression level and optional grayscale.

Customize & compress

Optionally open Custom settings for quality, DPI, and metadata. Then click Compress PDF.

Download

Download one compressed PDF or a ZIP of multiple. No account required.

Frequently asked questions

Merge PDF
Combine whole files, or select specific pages to merge into a new document.
Split PDF
Extract by range, even/odd, every page, visual selection, bookmarks, or every N pages—all in your browser.
PDF Editor
Annotate, highlight and edit PDF documents.