Optimize PDF Tools
5 free tools
Optimizing a PDF means making it smaller, or cleaner, without making it worse. Most of the time the goal is simple: the file is too big to email, upload to a portal, or attach to a form that caps attachments at 10 MB.
The reason PDFs are oversized is nearly always images. A single scanned page at 300 DPI can be a megabyte on its own, so a ten-page scan is ten megabytes of mostly page — which is where the savings are.
All optimize pdf tools
Compression trades size against quality. Text stays sharp at almost any setting; scanned photographs and gradients are where you will notice the difference, so check a photo-heavy page after compressing.
Optimize PDF questions
- How much can I compress a PDF?
- A text-only document often drops by 60–80 percent. A scan of ordinary text drops similarly. A photo-heavy document has less room, because the photographs are already compressed and there is little redundant data left to remove.
- Which compression level should I use?
- Recommended suits most documents and keeps text comfortably sharp. Basic keeps quality closest to the original for a file that only needs trimming. Strong gives the smallest file and is worth trying on an archive copy or anything that only has to be readable.
- Why is my PDF still too large after compressing it?
- Usually because it is mostly images, or because it already carries high-resolution scans that cannot shrink much further. Converting a scan to greyscale, or extracting the text instead of keeping the page image, often saves more than compression alone.
- Does compressing a PDF reduce its quality?
- Some, and it depends on the setting and the content. Text remains legible at every level. Photographs and smooth gradients show compression artefacts first, so open the result and compare a busy page before sending it on.