500KB is a comfortable limit that appears on many document portals, email-size workarounds and content management systems. It's roomy enough for a multi-page scanned document or an image-rich PDF to stay at good quality, while still being well under what an uncompressed scan produces. This is the target where compression and legibility are easiest to balance.
The tool re-renders each page at a quality tuned to fit 500KB and rebuilds the file locally. Because the limit is generous, most documents keep near-original clarity — the compression is doing housekeeping rather than heavy lifting.
or drop it anywhere in this box
Best for scanned documents · processed locally on your device
Common form limits: 100, 200, 500 KB, or 1024 (1 MB)
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Works best on scanned or image-based PDFs (certificates, ID scans, forms). Text-heavy PDFs may not shrink as much and their text can become non-selectable. Everything runs in your browser — the file is never uploaded.
AD SLOT — BELOW TOOL
When 500KB is about email, not a portal
Sometimes a 500KB target is self-imposed — you're emailing a document and want it to send quickly or stay under a recipient's mailbox limit. In that case you have room to favour quality: aim for 500KB rather than squeezing lower, since there's no strict rejection threshold, just courtesy. For scanned documents specifically, a 500KB PDF is usually indistinguishable from the original on screen.
Frequently asked questions
Is 500KB enough for a 10-page scanned document?
Usually yes, at readable quality — around 50KB per page, which suffices for grayscale text scans. Dense colour pages use more, so results vary by content.
Does the tool reduce quality more than necessary?
No — it searches for the highest quality that still fits your target, stopping as soon as it's under. It won't over-compress.
Can I go lower than 500KB with the same tool?
Yes — just enter a smaller target. The same page will let you aim for 200KB or 100KB, with correspondingly lower per-page quality.