Increase PDF File Size
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.
Add one or more PDFs.
Choose the minimum size, such as 100 KB, or type your own.
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
- Compress PDFNewShrink PDF file size while keeping the best quality possible.
- Compress JPGNewShrink photos and signatures to a size you choose, like 50 KB.
- Increase JPG SizeNewMake a photo or signature bigger in KB to meet a form's minimum size.
- OCR PDFTurn scanned PDFs into searchable, selectable text.
- Remove AnnotationsStrip comments, highlights and markups from a PDF.