Choose a PDF and this tool compresses it towards under 100 KB (100,000 bytes max target). It first tries a lossless rebuild; if that is not enough it re-renders pages at step-by-step lower resolutions until the target is met — and if the target is genuinely unreachable for your file, you get the smallest version it could make, with the status line saying so honestly. Runs fully in your browser — nothing is uploaded.
An upload form says “PDF, max 100 KB”? This tool squeezes your file under the cap — and tells you plainly if the cap cannot be met.
100% free · No sign-up · No daily limits · No watermarks · Processed in your browser — files never leave your device
Compress a PDF towards under 100 KB: a lossless rebuild first, then a step-by-step rendering ladder — and if 100 KB is unreachable for your file, the smallest honest result with a status line that says so.
A two-page application form exported at 480 KB must fit a portal’s 100 KB cap. The ladder lands it at 96 KB — small text, still legible — and the portal accepts it first try.
The tool first tries the free win: rebuilding the PDF structure losslessly (no visual change, text untouched). Only if that misses the cap does it re-render pages as JPEG images at descending resolutions and qualities, weighing the real output after every step and stopping at the first fit. Reaching a byte target is a measurement process, not a promise — input density decides what is possible.
Pages carry a minimum of image data once re-rendered; many dense pages simply sum past 100 KB at any readable quality. The tool reports the smallest it could reach rather than shipping an unreadable file at target.
Only when the lossless step fits the cap (small, text-based files). Ladder results are rendered images of the pages — text is visible but not selectable. The status never hides which happened.
About 150 DPI at high JPEG quality, descending through eight steps to roughly 45 DPI at low quality — it stops at the first step that fits, so you always get the best quality that meets the cap.
Compress PDF offers gentle optimize or a fixed strong setting. This tool chases one specific byte cap (100 KB) and measures its way there — use it when a form names that number.
No — compression runs entirely in your browser.