Compress PDF to 500 KB
Reduce a PDF's file size to under 500 KB for portals that allow up to 500 KB per document. Free and private — pages are re-rendered at progressively lower quality in your browser until the file fits, never uploaded.
To compress a PDF to 500 KB, this tool re-renders the pages at progressively lower quality and resolution until the file drops under 500 KB. Drop your PDF and it targets 500 KB automatically. If 500 KB isn't reachable, it delivers the smallest version it can and tells you the exact size rather than faking success. Processing happens locally in your browser.
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How it works
- Choose one or more PDF files.
- Adjust the quality and resolution sliders.
- Click Compress, then download the smaller PDF — or “Download all” as a .zip for a batch.
Frequently asked questions
How do I reduce a PDF's size to 500 KB?
Load your PDF here and it steps the image quality and resolution down until the file is under 500 KB, then lets you download it. You'll see the final size first.
Can I compress a PDF to 500 KB without losing quality?
Some quality loss is unavoidable when targeting a fixed size — but the tool always uses the highest quality that still fits under 500 KB, so it loses no more than necessary. The closer your original is to 500 KB, the less visible the difference.
Will the text stay selectable?
No — to hit a strict size target, pages are re-rendered as images, so text becomes part of the image. Keep the original if you need selectable text.
What if the PDF can't reach 500 KB?
Very long or dense PDFs may not fit 500 KB while staying readable. In that case the tool shows the smallest size it achieved instead of claiming success.
Is my PDF uploaded?
No — compression runs entirely in your browser.