Compress PDF to 50KB Online Free
50KB is about as tight as document upload limits get. A few older government portals and scholarship forms still enforce it, and most desktop PDF exporters cannot hit it at all. This page presets the target to 50KB and tunes image quality down until the file fits.
Be realistic about the trade-off: at 50KB a multi-page scan will lose visible sharpness. If the portal accepts 100KB, use that instead — the result is markedly more readable.
Your file never leaves your browser. All processing happens on your device. Nothing is uploaded to any server.
When you need 50KB
- Legacy government portals with a hard 50KB cap
- Scholarship and subsidy application forms
- Attaching a short document where the mail server limit is tiny
Other size targets
Need a different size or a quality slider instead? Use the compress pdf. New to it? read the guide.
Frequently asked questions
Not always. A single-page text or scan document usually can; a long, image-heavy PDF may not compress that far while staying legible. The tool reports the size it actually achieved.
For a one-page document, generally yes. Pages are rendered as compressed images to guarantee the size, so text is no longer selectable and fine print may soften.
No. Compression runs entirely in your browser.
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Every category runs free in your browser — nothing is uploaded.