Compress PDF to 100 KB
100 KB is a tight limit, and it suits one or two scanned pages best. The tool picks a lower resolution, then the best quality that fits.
Rebuilds your PDF as compact images so it lands under the size you need. Best for scanned documents and photos; text won't stay selectable.
Advanced
What fits in 100 KB
Each page gets a share of the limit, so one page has 100 KB and ten pages have about 10 KB each. A short certificate or ID usually stays readable. For a long document, turn on greyscale under Advanced, or send only the pages the form needs.
Want to know how it works, or need a different limit? See the main Compress PDF to exact KB page.
Frequently asked questions
Is my file uploaded?
No. Everything runs inside your browser, on your device. Nothing is sent to a server, so private documents stay private.
Why can't I select the text afterwards?
To guarantee the size, each page is rebuilt as an image. Text can no longer be selected or searched, and form fields and links are lost. Scanned documents lose nothing, because they are already images.
Why can't my PDF go below a certain size?
Every page needs some bytes to stay readable, so the limit depends on the number of pages. Try greyscale or a lower DPI under Advanced, or send fewer pages. If the target can't be reached, the result tells you the smallest size it managed.
Why do fine lines look soft?
Small size targets use a lower DPI. Drawings and maps with thin lines can look soft at 110 DPI. Choose a higher DPI under Advanced and allow a larger file if you can.