Compress PDF to 100 KB

When 100 KB is asked for

Some scholarship, recruitment and certificate portals allow only 100 KB per document — often for a caste, income or domicile certificate that is a single page. The limit is per file, so a two-page certificate has roughly 50 KB for each page.

Getting there

One or two pages reach 100 KB comfortably. For more pages, remove what isn't required and scan in greyscale. The tool tries eleven quality and resolution steps and keeps the first one that fits, so the file comes out as sharp as 100 KB allows rather than smaller than it needs to be.

A single page, done well

For a one-page certificate the cleanest route to 100 KB is often to start again from a good photo instead of squeezing a heavy scan. Lay the certificate flat by a window, hold the phone straight above it so the page fills the frame, and avoid the flash, which leaves a bright patch. Crop it to the paper's edge, turn it into a PDF with JPG to PDF, then compress that file here. A sharp, evenly lit photo compresses to a much smaller file than a dim, shadowed one at the same quality.

Check the details that matter

Zoom in and read the certificate number, the issuing office and the date of issue. Many newer certificates carry a QR code or barcode for online verification; if it has turned fuzzy, scan that page again with higher contrast, because a blurred code may not scan for the person checking it.

If it won't fit

The tool tells you the smallest size it reached. Split the document into separate files, or photograph a single page at a lower resolution and use “Images to PDF”. For limits other than 100 KB, use Compress PDF to 200 KB or type your own size on the Compress PDF page.