Compare two texts online and instantly see what changed. Free text diff checker with line, word and character comparison. No signup, fast and private.
Need to know exactly what changed between two versions of a text? Our free Text Diff Checker compares two texts side by side and highlights every addition, deletion and edit in seconds. Paste your original and changed text, choose to compare by lines, words or characters, and see the differences clearly marked in green and red. It is ideal for writers, editors, developers and students who want to review edits, check revisions or spot small changes. Everything runs in your browser, so your text is never uploaded or stored.
How to use
- Paste your original text into the left box.
- Paste the changed text into the right box.
- Choose how to compare: Lines (side by side), Words (inline) or Characters (inline).
- Optionally tick Ignore case or Ignore extra whitespace to skip minor differences.
- Click Compare to see the result. Green marks added text and red marks removed text.
- Use Swap to reverse the two texts, Sample to try an example, or Clear to start over.
FAQs
What is a text diff checker?
A text diff checker compares two pieces of text and shows exactly what was added, removed or changed between them.
Can I compare text by words or characters instead of lines?
Yes. Line mode shows the two texts side by side, while word and character modes show the changes inline in a single view.
Does the tool ignore uppercase and lowercase differences?
It can. Tick “Ignore case” and “Hello” and “hello” are treated as the same.
Is my text saved or uploaded anywhere?
No. The comparison happens entirely in your browser, and nothing is sent to a server.
Is the Text Diff Checker free?
Yes. It is completely free, needs no registration and has no usage limits.
Can I use it to compare code?
Yes. Line mode works well for code, config files, JSON and any other plain text.
