PDF Compress · On-device0 B of your document uploaded0 B uploaded
Compress a PDF to 100 KB
The whole job runs in your browser — your file never leaves this device. Built for upload portals with hard size limits.
Drop your PDF here
We'll get it under 100 KB — or tell you honestly how close we got.
local processing · 0 B of your document uploaded · nothing stored
Why 100 KB
100 KB is the strictest common ceiling
A 100 KB ceiling usually appears on single-document attachment fields — one certificate, one ID page, one signed form. It is the hardest target: a multi-page scan generally cannot make it while staying readable.
This page is pre-set to search for the best quality that lands under 100 KB. If your document genuinely can't get there readably, we show you the smallest readable version instead — and 200 KB is one click away.
How it works
Three steps, zero uploads
Pick your PDF
Drop it on the sheet or browse. It's read directly by your browser — the meter above stays at 0 B.
We search for the target
The tool detects what kind of document it is, then re-encodes pages just enough to land under 100 KB — keeping them sharp.
Download — or hear the truth
You get the compressed file instantly. If 100 KB isn't reachable without wrecking quality, we say so instead of shipping garbage.
All tools
The rest of the drawer
More on-device tools are on the way — compression ships first.
Compress PDF — any size
Pick a preset ceiling or type your own custom target.
on-deviceCompress PDF to 200 KB
document uploads on many e-form & application portals
on-deviceCompress PDF to 500 KB
common ceiling for résumés, cover letters and job-portal uploads
on-deviceCompress PDF to 1 MB
Indonesia's CASN/SSCASN portal ceiling for ijazah & transcript PDFs
on-deviceCompress PDF to 2 MB
keeps long scans email-friendly and under most generous portal caps
Merge, split & more
The same no-upload treatment for the rest of the drawer.
On your phone
Scan paper into PDFs with the Android app
The scanner, reader and annotator behind these tools. Camera to compressed PDF in under a minute.
Get it on Google PlayQuestions
Fair questions, straight answers
What if my PDF can't reach 100 KB?
Some documents can't get there without becoming unreadable. When that happens we stop at the best readable size, show it to you, and let you decide — we never silently ship a wrecked file.
How can it be free with no upload?
Because your device does the work, serving you costs us almost nothing. We make the free Fast PDF Reader Android app — if these tools are useful, some people install it. That's the whole model.
Is my file really never uploaded?
Yes. The compressor is code running in your browser tab. Your document's bytes never leave the device — disconnect from the internet after the page loads and the tool still works.
Will the text still be selectable?
No — to hit hard size targets reliably, pages are rebuilt as high-quality images, so text stays sharp and readable but is no longer selectable. If you need selectable text, keep the original alongside the compressed copy.
Does it work on my phone?
Yes — this page is built for phones first. Very large files depend on your device's memory; if a file is too big for your device, we tell you instead of failing silently.