Utility · free
Text Diff Checker
Compare two texts line by line and see exactly which lines were added, removed or changed, highlighted for clarity.
+ added − removed unchanged
About the Text Diff Checker
Compare two texts line by line and see exactly which lines were added, removed or changed, highlighted for clarity.
Everything runs in your browser — nothing is uploaded.
How to use the Text Diff Checker
- Step 1Paste your input into the field.
- Step 2Press the button to transform it.
- Step 3Copy or download the result.
When people reach for this tool
See exactly which lines changed
Line-by-line output is much faster than reading two texts side by side.
Confirm the change was the one you intended
Seeing additions and removals in context makes an accidental deletion obvious.
Spot a setting that reverted unexpectedly
Differences in a configuration file are small and easy to miss by eye.
Practical tips
- Differences are computed line by line,A change inside a very long line shows as one changed line rather than pinpointing the word, so check the line itself.
- Ignore the case you do not care about,A whitespace-only change matters in code and not in prose, so read the result in that context.
What you get
- One-click transforms
- Local processing, nothing uploaded
- Free and unlimited
Text Diff Checker — FAQ
How does the diff work?
A classic longest-common-subsequence line diff, marked inline so you can read changes at a glance.
How does the comparison work?
Line by line, with lines that appear only in one side marked as added or removed and lines that differ marked as changed.
Does it find differences inside a line?
It marks the whole line as changed. It is built for readable output rather than character-level precision, which is usually what you want when reviewing text.
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