Simple Text Difference Checker

※ We aimed for simplicity above all, so this is a fairly basic comparison tool.
If you want to do advanced comparisons, please use a proper application.

"I made a small edit to the document, but where exactly is it different from the previous version?" "I don't need to open a heavy tool for engineers, I just want to quickly check where the text changed!"

A text comparison tool that's incredibly simple and easy to use—perfect for exactly these situations.

The usage is surprisingly simple! Just copy and paste the two pieces of text you want to compare into the input fields on the left and right at the top, and click the "Compare Differences" button.

Then, on the screen below, the changed parts are instantly highlighted with the "red" and "green" background colors that are familiar from WinMerge.
Rather than rough line-by-line comparisons, it carefully finds even the tiniest differences down to individual characters, making it perfect for checking typos and small code edits.

Plus, since it runs on just a single HTML file, there's no tedious installation or user registration required. Even in offline environments without internet, you can use it safely and smoothly anytime, anywhere—all you need is a browser.

Your reliable companion that eliminates the hassle of searching—simple and dependable!