Compress PDF to 100 KB
Get a PDF under 100 KB for forms and portals with strict upload limits. We find the best quality that still fits. Free, no watermark, no signup.
Files never leave your device.How it works
How to compress a PDF to 100 KB
- Drop your PDF above (or click to select).
- Click Compress — we search for the highest quality that stays under 100 KB.
- Download the result, or see the smallest we could reach if 100 KB isn't possible.
Frequently asked questions
- What if 100 KB isn't achievable?
- We tell you honestly and give you the smallest version we could produce without corrupting the file — never a broken result.
- Will the text stay readable?
- Yes. Pages with real text keep it selectable — only images are re-encoded. Scanned pages are re-encoded at a lower resolution.
- Do my files get uploaded?
- No — everything runs in your browser. Your PDF never leaves your device.
When 100 KB is the hard ceiling
A 100 KB cap is common on the strictest portals: government and visa applications, university exam registrations, and older upload forms. These systems reject anything larger outright, so “close enough” doesn't help. This tool searches for the highest quality that still fits under 100 KB and stops there.
What realistically fits
100 KB is tight. Text-based PDFs and short documents usually make it comfortably. A one- or two-page scan often can too, at a lower resolution. A long, image-heavy scan may not fit without becoming unreadable — and rather than hand you a useless file, HivePDF tells you the smallest size it could reach honestly. If that happens, try splitting the document or scanning in black-and-white at a lower resolution first.