Compress a PDF to 100 KB
Job portals, visa applications and government forms often cap uploads at 100–500 KB. Use Strong compression to squeeze your PDF under the limit. Everything runs locally in your browser — your file is never uploaded to a server.
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Stays on this device — never uploaded
Choose filesAbout compress pdf to 100kb
Strict upload caps — 100 KB, 200 KB, 500 KB — usually come from application portals: government forms, university admissions, job sites and visa systems. Strong compression re-encodes each page as an optimized image, which gives the biggest reduction and is usually what gets a one- or two-page document under a tight cap.
How small your file can get depends on what's in it: page count matters most, then image content. A short text document compresses far below 100 KB; a 30-page scan won't fit under any setting. If a long document misses the limit, upload only what the form actually asks for — extract the relevant pages first, then compress the smaller file.
Like every tool here, compression runs entirely in your browser. The forms you're compressing — often full of personal data — are never uploaded to us or anyone else.
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Questions, answered
Q.Can it compress any PDF to exactly 100 KB?
No tool can guarantee an exact size — the floor depends on page count and content. Strong mode gets closest; if you're still over the limit, extract just the required pages and compress that shorter file.
Q.Will the PDF still be readable after Strong compression?
Yes — pages stay clearly legible, which is what application portals need. Text is re-encoded as an image though, so it's no longer selectable; use Light mode when you're near the limit and want selectable text.
Q.Are my files uploaded to a server?
No. Every operation runs entirely in your browser using JavaScript, so your files never leave your device. Open your browser's Network tab and watch — nothing is sent or stored.
Q.Is it free? Do I need an account or to install anything?
It's completely free with no sign-up, no email and nothing to install. There are no daily limits and no watermarks on your output.
Q.Does it work on Mac, Windows, Chromebook and phones?
Yes. It runs in any modern browser — Chrome, Edge, Firefox or Safari — on Windows, macOS, Linux, Chromebook, iPhone and Android. There is nothing to download.