Skip to content
PDFCraftly

Increase PDF Size in KB

Make a PDF bigger in KB to meet a portal's minimum file size.

Runs in your browser — files never leave your device

or drop files here

How to increase a PDF's file size

Some upload portals reject PDFs below a minimum size. This tool adds invisible padding inside the file until it reaches the size you need; the pages, text and images stay exactly the same.

  1. Add one or more PDFs.

  2. Choose the minimum size, such as 100 KB, or type your own.

  3. Click Increase size and download the bigger PDF.

Increase PDF Size FAQ

No. The padding sits in a part of the file that PDF viewers ignore, so every page looks and prints exactly as before.

Usually to reject blank or unreadable scans. If your scan is genuinely poor, a better scan is the real fix; if it's just a small, clean PDF, padding meets the rule.

Yes. A 100 KB minimum becomes at least 102,400 bytes, which passes whether the portal counts 1 KB as 1,000 or 1,024 bytes.

No. The tool runs entirely in your browser, so your files are processed on your own device and never leave it.

Yes. Every PDFCraftly tool is free, with no sign-up, no watermark and no email required.

Guides

More optimize tools