Compress PDF to 300 KB

Get a PDF under 300 KB for an application or upload form. Type the size, check the pages in the preview, then download. Free, and it stays on your device.

Before you start

300 KB sits between the tight 200 KB limit and the roomier 500 KB one, and some upload forms cap each document at exactly that. Split evenly, a 5-page PDF gets about 60 KB a page, so how many pages you send matters as much as how you scan them.

The PDF tool below opens with 300 KB filled in. Add your PDF, look at the preview, and press "Make it this size". If your PDF is already under 300 KB, the tool tells you and you keep the original.

Tips

Do the sum per page: 300 KB shared over 6 pages is 50 KB a page. Take out blank pages, covers and duplicates in your PDF program before you start.

Tick "Black & white" for printed text such as letters, statements and forms. Keep colour only for stamps, photos and signatures.

A phone scan taken in even light shrinks better than one with shadows across the page, because shadows are extra detail to store.

Questions and answers

Is 300 KB the same as 0.3 MB?

About, yes. Websites count a kilobyte as 1,000 or 1,024 bytes, so 300 KB is 300,000 or 307,200 bytes. SafeResize keeps the file under 300,000 bytes, so it passes both ways.

What if the result is still too big?

For a long PDF, tick "Black & white", or send only the pages the form needs (take the others out in your PDF program). When a size cannot be reached, the tool tells you the smallest it could make, so you know how far off you are.

Is my PDF uploaded to be made smaller?

No. The work happens inside your browser, so the PDF never leaves your phone or computer.