Compress PDF to 100KB
Automatically steps quality down until your PDF fits under 100KB - free and entirely in your browser.
A 100KB ceiling shows up on the strictest upload forms - government portals, visa and tax filing systems, and legacy email gateways that bounce anything bigger. This tool compresses your PDF in passes, stepping image quality and resolution down until the file fits under 100KB. Everything runs in your browser, so the document behind that strict limit is never uploaded to a server.
Drop a PDF here
or click to browse. Shrink scanned documents and image-heavy PDFs - right in your browser.
Frequently asked questions
Can every PDF be compressed to 100KB?
Short documents, yes. A one or two page scan usually fits once its pages are re-encoded at lower quality. Long, image-heavy files may bottom out above 100KB even at the lowest settings, in which case the tool delivers the smallest version it achieved and shows you the final size.
Will a 100KB PDF still be readable on a portal?
For typical forms and scans, yes. Portals that impose 100KB limits expect low-resolution documents, and text stays legible at the reduced quality. Check the preview after downloading, and if a page looks too soft, split the PDF and compress fewer pages per file instead.
Other size targets
Compress to 200KB
Compress a PDF to 200KB or less for job applications and exam registrations. Automatic quality stepping - free and entirely in your browser.
Compress to 500KB
Shrink scanned contracts and multi-page PDFs to 500KB or less. Automatic size targeting that never uploads your documents.
Compress PDF
Balanced and Maximum modes with full control