Question 1

What is a text compare tool?

Accepted Answer

A text compare tool (also called a diff checker) takes two pieces of text and highlights every difference between them — words that were added, removed or changed — so you can review edits at a glance instead of reading both versions line by line.

Question 2

How do I compare two texts?

Accepted Answer

Paste your original text in the left box and the changed version in the right box, then press Compare. The differences are highlighted side by side: added content in green, removed content in red, and changed words highlighted within each line.

Question 3

Is this text comparison tool free?

Accepted Answer

Yes. CalcEngine Text Compare is completely free with no sign-up, no ads and no limits on how many comparisons you can run.

Question 4

Is my text private and secure?

Accepted Answer

Absolutely. The comparison runs entirely in your browser using JavaScript. Your text is never uploaded to a server, so it stays on your device.

Question 5

Can I ignore case or whitespace when comparing?

Accepted Answer

Yes. Use the 'Ignore case' toggle to treat differently-cased text as equal, and 'Ignore whitespace' to skip leading and trailing spaces when matching lines.

Question 6

What types of text can I compare?

Accepted Answer

Anything text-based: paragraphs, essays, code, JSON, configuration files, lists, contracts, translations and more. The tool aligns the two documents line by line and highlights word-level changes within each line.

Question 7

Does it work on mobile?

Accepted Answer

Yes. The text compare tool is fully responsive — the input boxes stack on small screens and the highlighted result scrolls horizontally so it remains readable on phones and tablets.

Text Compare

How the text compare tool works

Frequently Asked Questions