Text Compare
Compare two blocks of text and highlight what changed. Word-level diff.
What is the Text Compare?
The Text Compare tool highlights the differences between two blocks of text side by side. It shows added lines in green, removed lines in red and unchanged lines in a neutral tone, so you can see exactly what changed without reading both versions from the top.
Writers use it to review edits from an editor, developers use it to compare configuration files, teachers use it to detect near-duplicates in assignments and lawyers use it to spot last-minute contract tweaks. It is one of the fastest ways to audit changes in any body of text.
The diff runs in your browser. Neither text is uploaded, which matters for legal documents, medical notes or unpublished manuscripts.
How to use the Text Compare
- 1Paste the original text into the left column.
- 2Paste the modified text into the right column.
- 3Click "Compare" or watch the diff refresh live if the tool supports it.
- 4Scan through the highlighted additions, deletions and unchanged lines.
- 5Copy the diff or share a link if the tool exposes one.
Key features
- Line-by-line and word-by-word diff modes
- Green / red / neutral colour coding
- Ignore whitespace toggle
- Ignore case toggle
- Handles large multi-thousand-line inputs
- Runs offline in the browser
Examples
Contract review
Compare the vendor’s revised contract against your original to see every clause they altered.
Code snippet diff
Spot the changes between two versions of a config file before deploying.
Essay editing
A writer sees exactly which sentences an editor rewrote.
Why use this tool
- Reveals hidden edits in seconds
- Prevents costly mistakes in contract or code reviews
- Great teaching aid for showing before/after edits
- Free and works with any text
- No files uploaded, so it is safe for sensitive documents
Common use cases
- Reviewing legal contract revisions
- Auditing configuration file changes
- Detecting plagiarism between two documents
- Comparing translations of the same text
- Reviewing manuscript edits
- Spotting differences in customer support responses
Frequently asked questions
Does the tool detect moved paragraphs?
It treats moved content as a removal + addition. True move detection is on the roadmap.
Can I ignore whitespace differences?
Yes — enable the "ignore whitespace" toggle to skip pure indentation changes.
Is the diff case-sensitive?
By default yes. Toggle "ignore case" to compare in a case-insensitive way.
Are my texts stored anywhere?
No — the diff runs in-browser and disappears when you close the tab.
What is the maximum text size?
The tool handles thousands of lines. Very large inputs may slow down the highlighting.