Text Compare (Diff Checker)
Find the differences between two versions of text, code or config side by side. Changed lines are aligned and the exact changed characters are highlighted.
How to use it
- Paste the original text on the left and the changed text on the right.
- Optionally ignore case or whitespace, then click Compare.
- Read the result: red rows were removed, green rows added, amber rows changed with the exact characters marked.
Frequently asked questions
How large can the texts be?
Each side can be up to about one million characters, which covers most source files, logs and configs.
Can I ignore whitespace or letter case?
Yes — choose "Ignore leading/trailing" or "Ignore all whitespace", and tick "Ignore case" to treat Hello and hello as equal.
Is it free, and what happens to my text?
It's free with no sign-up. Your text is sent over HTTPS only to compute the result, processed in memory and never stored or logged.