Compress PDF to 100KB
Get a PDF under 100 KB for exam, job and ID upload forms. Lossless first, then stronger passes only if needed; you are told if 100 KB cannot be reached.
Drop files here or click to browse
Upload one file
Accepted: PDF
Get a PDF under 100 KB for exam, job and ID upload forms. Lossless first, then stronger passes only if needed; you are told if 100 KB cannot be reached.
Drop files here or click to browse
Upload one file
Accepted: PDF
100 KB is the tightest limit most people meet: it is what many exam, scholarship, government job and ID-verification forms allow for a scanned certificate, a signature page or a photo ID. Upload the PDF and Fileixa first tries lossless compression, which keeps text sharp and selectable. Only if that is not enough does it turn the pages into compressed images, step by step, until the file is under 100 KB. A one-page scan usually fits and stays readable; a long colour scan often cannot, and you will be told so instead of getting a file that silently misses the limit.
100 KB is one of the strictest limits you will meet. It is common on government job portals, exam and scholarship applications, and visa or ID upload forms, which often ask for a scanned certificate, a signature page or a photo ID as a PDF of 100 KB or less.
That is enough for one or two pages of plain text, or a single scanned page at modest resolution. A multi-page colour scan will almost always lose visible sharpness to get there.
First the PDF is recompressed losslessly, which keeps text selectable and images untouched. If that already fits, you are done with no loss of quality. If not, the pages are turned into compressed images at progressively lower resolution and quality until the file fits, and the smallest version that fits is kept.
That second step is lossy: text in the result is no longer selectable, and fine print gets softer as the target shrinks. The tool always reports whether the target was reached; if even the strongest pass cannot fit, you get the smallest file it could make, labelled as a miss rather than passed off as a success.
Scan in greyscale rather than colour, at 150–200 dpi, and upload only the pages the form asks for. Remove Pages or Extract Pages first if your file has extras. Each page you drop saves more than any compression setting.
A colour scan stores every page as a photo. Three of them in 100 KB leaves about 33 KB per page, which is too little for small print to stay legible. Rescan in greyscale at 150 dpi, or send only the page the form asks for.
Yes if lossless compression alone gets the file under 100 KB. If the pages have to be turned into images to fit, the text in the result is no longer selectable, and the page tells you when that happened.
Some sites count 1 KB as 1,000 bytes and others as 1,024. This tool aims below 102,400 bytes; if a portal is stricter, use the 100 KB result and check the exact size it shows in your file manager, or remove a page.
Combine documents in the right order, remove unnecessary pages, then reduce the final PDF size without assuming that merging automatically compresses it.
Why PDFs get large, what compression can and cannot do, and how to meet strict job, visa and university portal size limits while keeping the file readable.