PDF — Put your documents in order.
Compress a PDF
Heavy PDFs are heavy because of their photos. This redoes the photos — and only the photos.
- Works out how large each photo is actually shown on the page, and scales it to the resolution you pick: 300 dpi for print, 150 for screens and email, 100 for the smallest file.
- Each photo is saved at the lowest JPEG quality that still looks identical, measured with SSIM — the same check as the image compressor.
- Text stays text and drawings stay vectors: nothing is re-rendered, so nothing goes blurry.
- Uncompressed streams get compressed, leftovers are dropped — and the metadata can go too.
- If nothing would get meaningfully smaller, you get the original back and a note that says so.
Everything on this page runs on your device. Nothing you drop here is uploaded.
Questions
- Why is my PDF still big?
- Fonts, vector drawings and some kinds of images (CMYK, scans in 1-bit, JPEG 2000) are left as they are. If the weight is there, a different tool is needed — and the note says how many images were left alone.
- Will my scans get blurry?
- At 150 dpi a printed page of text reads cleanly. Choose Print · 300 dpi or Looks identical if you need to zoom far in.
- Is my document uploaded?
- No. It is read and rewritten in this page.