Compress PDF to 500 KB
Get your PDF under 500 KB — automatically.
🔒 Everything above runs on your device — your file is never uploaded anywhere.
Compress PDF to 500 KB reduces your document to half a megabyte or less. It is free, private and runs in your browser.
Half a megabyte is a frequent cap for attachments on application and registration forms. It is a comfortable target: most short documents and scans of a handful of pages can be compressed under it while staying clearly readable. Fewer compression steps are needed than for 100 or 200 KB, so quality stays higher.
The tool rebuilds each page as a compressed image and steps the quality and resolution down until the whole file fits under the limit, then stops at the first result that fits, so you keep as much quality as possible. Because pages become images, the text in the compressed file cannot be selected. Keep your original for that.
How it works
- 1Upload your PDF.
- 2Click Compress to 500 KB. The tool tries progressively stronger compression until it fits.
- 3Download the smaller PDF.
Frequently asked questions
How do I compress a PDF to under 500 KB?+
Upload it here and press Compress to 500 KB. The tool lowers image quality and resolution step by step until the file is under 500 KB, then gives you the result.
Is 500 KB enough for a multi-page document?+
Often yes for around five to ten scanned pages. Text-only PDFs are usually already small.
Is my PDF uploaded?+
No. Compression runs in your browser and the file never leaves your device.
What if it cannot reach the limit?+
Very long or dense documents may not fit. You will be told, and given the smallest readable version. Splitting the PDF into two parts first usually solves it.