Features
- Breakdown: images, fonts, page content, attachments, metadata, structure and old versions.
- Biggest images with pixel size and approximate DPI.
- Size of every page.
- Plain tips and a link to the right compressor.
How to use it
Choose the PDF. The file is opened on your device and every object is measured.
Read the coloured bar and the tips - they point to the biggest win.
Use Compress PDF (or "compress to 200 KB") for image-heavy files.
Free and private
Everything happens inside your browser: your files are read on your own device and are never uploaded, stored or seen by anyone else.
Questions
What DPI do I need?
150 DPI is enough for screens and normal printing; 300 DPI only for high-quality print.
Why does "structure & old versions" matter?
A PDF edited many times keeps earlier versions inside. Saving it as a new file removes them - often a big saving with no quality loss.
Is it free?
Yes - free and unlimited, with no sign-up and no watermark.