A few times a week I find myself turning to diff checker websites to compare snippets of text or JSON, but I've always found their UIs clunky or unnecessarily complicated. I set out to build a simpler option with a pleasing UI.

Features that mattered to me:

- Client-side only diff that never leaves the browser

- Clear indicator when text is identical

- Text input preserved in localstorage so it persists between refreshes

- Ability to show only changed lines for comparing larger files

- Auto JSON formatting to test for equivalence (pretty print + object key sort)

- Drag-and-drop text files directly into the input fields

- Dark mode