Compress PDF to 50 KB

How to compress a PDF below 50 KB

1. 1

   Choose a PDF

   Click Choose PDF or drag the file onto the page. The file stays on your device.

2. 2

   Click Compress PDF

   The 50 KB limit is already set, so there is nothing to type. If the PDF is already under 50 KB, you get it back unchanged.

3. 3

   Check the result

   You will see the size before and after. If the file cannot get down to 50 KB, the page tells you how much too big it is and shows the Try a lower resolution button.

4. 4

   Download the file

   Before the download we check that the smaller PDF opens, has the same number of pages and has not lost any text.

What fits in 50 KB

50 KB is very little, enough mainly for one or two pages of plain text. A photo, a large logo or a scanned page can easily go over it, and after heavy compression small print, signatures and stamps may become hard to read. If you are sending several pages, check whether the form really needs all of them. After downloading, zoom in and read the key details, and keep the original just in case.

Where you will see a 50 KB limit

A limit this tight turns up in simple online forms and older systems that only accept very small attachments. The limit is a ceiling, so the finished file usually comes out a little smaller than 50 KB. The tool counts 1 KB as 1,024 bytes and 1 MB as 1,024 KB. If the form counts differently, or you are not sure how it counts, set a custom limit with a small margin on the main Compress PDF page.

A one-page confirmation or a text-only form is far more likely to fit than a scan or a document with a photo. The size of a PDF depends more on photos, scans and fonts than on the number of pages. A text-only document often fits with no visible change, while a scan may need its pages saved at lower quality. After downloading, compare important details, signatures, stamps and thin lines with the original.

What to do if the PDF will not fit in 50 KB

If the file cannot get below 50 KB, you can download the smallest version the tool managed to make and see how far over the limit it is. Then click Try a lower resolution. The file may get smaller still and the text stays selectable, but photos, stamps and thin lines will be less sharp, so look at the result before you send it.

If that is still not enough, cut down the document, not its readability. Use Delete PDF pages to drop pages the recipient does not need, keep only the required ones with Extract PDF pages, or Split PDF into several smaller files. If the recipient accepts bigger files, choose a higher limit in Compress PDF.

Privacy

All processing takes place in your browser. Your PDF is never uploaded to a server, and no data remains after you close the page.

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