Compress PDF to 300 KB
Get your PDF under 300 KB — automatically.
🔒 Everything above runs on your device — your file is never uploaded anywhere.
Compress PDF to 300 KB brings your file under 300 kilobytes automatically, with no upload and no signup.
Limits around 300 KB are used by many recruitment sites and email systems for attachments such as certificates, address proofs and forms. A few scanned pages generally fit in this budget with readable results, and the tool picks the gentlest compression that gets there.
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 300 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 300 KB?+
Upload it here and press Compress to 300 KB. The tool lowers image quality and resolution step by step until the file is under 300 KB, then gives you the result.
How many pages fit in 300 KB?+
Roughly three to six ordinary scanned pages, depending on how much of each page is photographic.
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.