Text Compare
Diff two text blocks side-by-side in one click — perfect for contract reviews, config audits and document comparison.
What is Text Compare?
Two near-identical documents arrive and you need to find every difference. Reading both windows side-by-side is exhausting and you'll miss small swaps.
Paste both versions and see additions and removals highlighted instantly.
If you're reviewing contracts, you flag every changed clause. If you're auditing configs, you spot drift from gold-standard templates. If you're checking drafts, you find transposed numbers and swapped words fast.
How to use Text Compare
Four steps. No setup, no signup.
Step 1
Paste the original (Text A)
Step 2
Paste the revised (Text B)
Step 3
Read the highlighted diff
Step 4
Hit Copy or screenshot for review
Example
Two near-identical lines, one clear diff.
Input
A: The quick brown fox jumps over the lazy dog. B: The quick brown cat jumps over the lazy dog.
Output
Changed: 'fox' → 'cat' 1 word changed, 8 unchanged.
Why Text Compare is useful
- ✓
Spot every difference between two drafts side by side.
- ✓
Review contract redlines without firing up Word.
- ✓
Audit configs and JSON for drift from a gold-standard.
- ✓
Toggle whitespace-ignore for prose comparisons.
Common questions
What algorithm matches lines?
Line-by-line LCS (longest common subsequence) matches identical lines and flags the rest.
Tip: Best when paragraph structure is similar.
Can I diff JSON or YAML?
Yes, line-level works on code. Semantic diff needs specialized tools.
Tip: Pretty-print JSON first for cleaner structural diffs.
vs Difference Checker?
Compare shows side-by-side. Difference Checker lists phrases as a change-log.
Tip: Compare for visuals, Checker for change logs.
Can I ignore whitespace?
Yes, toggle to treat indentation as equivalent.
Tip: Ignore for prose, never for Python source.
Last reviewed: April 2026 · Free, browser-based, no signup.
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