Compress PDF to 100KB — Free Online
Portal limits, email attachments, and application uploads love a tiny PDF — and 100KB is a common cutoff. This tool recompresses the images inside your PDF at progressively lower JPEG quality, pass by pass, until the file fits under 100KB. It stops the moment the target is reached, so you keep the best quality that still fits. All in your browser — your documents never leave your device.
Compress PDF to 100KB
Shrink a PDF under 100KB by recompressing its images — quality passes until it fits.
1 Add your PDF
2 Compression settings
3 Compress & download
✅ Done — compression report
How it works
- Step 1 — Drop in the PDF you need at 100KB or under. It’s read into your browser’s memory — nothing is uploaded.
- Step 2 — Pick a starting quality (best-quality starts high, aggressive starts lower).
- Step 3 — Hit Compress to 100KB. The tool rebuilds the PDF’s images at decreasing JPEG quality, pass by pass (up to 6), and stops the moment the file fits under 100KB — so you always keep the best quality that still hits the target.
An honest note: text and vector graphics compress very little, so success depends on how many images the PDF contains. A scanned document will shrink dramatically; a pure-text export may barely move — the tool tells you either way.
Everyday uses
- Job portals — get resumes and certificates under strict upload caps.
- Visa & immigration — many government portals cap uploads at 100–200KB per document.
- University applications — shrink transcripts and certificates to meet per-file limits.
- Email — attach tiny PDFs that never bounce back as “too large.”
- Forms & filings — slim down scanned declarations before uploading them to tax or business portals.
Frequently asked questions
Will the PDF still look readable? Yes. The tool stops at the first quality pass that fits under 100KB, so it never degrades images more than necessary. Text and vector graphics are never touched.
What if it can’t reach 100KB? You’ll get an honest “best effort” result — the smallest version the tool could produce — plus the exact overshoot. Text-heavy PDFs sometimes can’t shrink that far.
Does it work on scanned PDFs? Best of all. Scanned pages are just big images, which is exactly what this tool recompresses — savings of 70–90% are common.
Is my document private? Yes. Everything runs locally in your browser. Your files never leave your browser, and nothing is uploaded or stored.