Blog
How file size actually works, why upload forms behave the way they do, and how to get a file to the size a form is asking for without damaging it.
KB vs MB: What's the Difference and Why It Matters for Uploads
One megabyte is 1,024 kilobytes. That single conversion is behind most rejected uploads — here is how to read a form’s size limit correctly.
Why Do Some Upload Forms Require a Minimum File Size?
Minimum size rules are a crude proxy for image quality. Here is what the people who wrote those rules were actually trying to prevent.
Does Increasing File Size Reduce Image Quality? (Explained)
Padding a file cannot reduce its quality, because it never touches the image data. Re-encoding can. The difference matters.
File Size vs Resolution: They're Not the Same Thing
Resolution is how many pixels an image has. File size is how many bytes it takes to store them. Either can change without the other.
Common File Size Limits for Job Applications, Email Attachments, and Government Portals
A reference table of the size limits you are most likely to run into, and what to do when your file falls outside them.
How Image Compression Works (And How to Reverse It)
Lossy compression discards detail your eye is least likely to miss. Understanding what it removes explains why it cannot be undone.
PDF File Size Explained: What Makes a PDF Small or Large
Almost all of a PDF’s weight comes from embedded images and fonts. Knowing which one explains why your file is the size it is.
How to Increase File Size on Windows Without Software
Windows ships with three ways to make a file bigger — Paint, Print to PDF, and fsutil — and each has a catch worth knowing.
How to Increase File Size on Mac Without Software
Preview, Quick Actions and the Terminal can all make a file bigger on macOS. Here is how each one behaves.
Is It Safe to Increase a File's Size Online?
It depends entirely on whether the tool uploads your file. Here is how to check for yourself, in about thirty seconds.