Changed sentence
The fox jumps.
The fox leaps.
Text Diff
Compare two text versions side by side and highlight added, removed, and unchanged lines—perfect for contract edits, config changes, and revision tracking. Clean both versions with Plain Text Converter first, then follow up with Find and Replace Text for bulk fixes.
Text Diff
Paste both versions — comparison and stats update live.
Paste the original version
Paste the modified version
No comparison yet
Paste original and changed text above to see a side-by-side or unified diff.
No differences found
The two texts match with your current comparison options.
Side-by-side diff
Unified diff
Summary panels (added / removed / changed / unchanged)
Added Lines
Removed Lines
Changed Lines
Unchanged Lines
Your text stays in your browser — nothing is uploaded.
Example
Added line
Line one Line two
Line one Line two Line three
Removed line
Line one Line two Line three
Line one Line three
Whitespace ignored
Hello world
Hello world
Case ignored
Hello World
hello world
Text Diff Modes Explained
Line comparison
Compare whole lines — best for drafts, lists, and changelogs.
Word comparison
Compare word-by-word for finer edits inside sentences.
Side-by-side diff
View original and changed text in parallel columns with line numbers.
Unified diff
Classic + / - view for quick scanning of edits.
Ignore whitespace
Treat spacing-only differences as matches after normalization.
Ignore case
Compare text without treating capitalization as a change.
Ignore blank lines
Skip empty lines so paragraph spacing does not create noise.
Inline highlights
Highlight word-level edits inside changed lines.
Common Uses
Compare document drafts
Review revisions before publishing or sending for approval.
Review policy changes
Spot added, removed, or edited clauses in policy text.
Check code snippets
Compare config blocks, JSON, or short scripts line by line.
Compare AI outputs
See how two generated answers differ before choosing one.
Review contracts
Highlight legal or terms-of-service edits between versions.
Compare changelogs
Verify release notes against internal change lists.
Detect copied text edits
Find what changed after pasting from email, docs, or the web.
Compare translations
Review updated translation strings against prior versions.
Before and After Examples
Added line
A, B A, B, C
1 added
Removed line
A, B, C A, C
1 removed
Changed sentence
fox jumps fox leaps
1 changed
Whitespace-only change
a b a b
Match with Ignore whitespace
Case-only change
Hello hello
Match with Ignore case
Blank-line difference
A + blank + B A, B
Ignored with Ignore blank lines
Large Text Diff Examples
Contract revision
Payment due in 30 days.
Payment due in 45 days.
1 changed
Code snippet
const value = 1;
const value = 2;
1 changed
List comparison
Apple Banana Orange
Apple Orange Pear
1 added · 1 removed
Why Use Text Diff?
Document revisions
Spot edits between draft versions before you publish or approve.
Code snippets
Compare config, JSON, or script blocks line by line.
Contracts
Review clause changes in legal or policy text quickly.
AI outputs
See how two generated answers differ before choosing one.
Translations
Check updated translation strings against prior versions.
Changelogs
Verify release notes match internal change lists.
Text Diff vs Other Tools
| Task | Best tool |
|---|---|
| Compare two versions | Text Diff |
| Replace repeated text | Find and Replace Text |
| Remove duplicate lines | Remove Duplicate Lines |
| Sort rows before comparing | Sort Lines |
| Count document size | Word Counter |
| Clean pasted text first | Plain Text Converter |
Popular Workflows
Notes and Limitations
- This is a browser-based text comparison tool — all processing runs locally.
- Best for plain text, drafts, lists, snippets, and short documents.
- It does not merge changes automatically; you choose which version to keep.
- Very large documents may depend on browser performance — split huge logs if needed.
- Clean pasted text first with Plain Text Converter or Remove Extra Spaces for clearer diffs.
Frequently Asked Questions
Is comparison line-based or word-based?
Both. Choose Compare lines for whole-line diffs or Compare words for word-level comparison.
Can I compare words inside a line?
Yes. Enable Compare words or turn on Highlight changes inline to see word-level edits inside changed lines.
Can I ignore whitespace?
Yes. Ignore whitespace treats spacing-only differences as matches after normalization.
Can I ignore case?
Yes. Ignore case compares text without treating capitalization differences as changes.
Can I ignore blank lines?
Yes. Ignore blank lines skips empty rows so paragraph spacing does not create false diffs.
Does it show added and removed lines?
Yes. Added lines are highlighted green, removed lines red, and changed lines purple in the diff view.
Does it show unchanged lines?
Yes, by default. Toggle Show unchanged lines off to focus only on differences.
Can I compare code snippets?
Yes. Paste config files, JSON blocks, or short scripts — line comparison works well for structured text.
Can I compare large documents?
Large inputs work in the browser but may slow performance. Split very large logs into smaller chunks if needed.
Will it merge changes automatically?
No. Text Diff highlights differences only — you choose which version to keep manually.
Is my text uploaded?
No. Comparison runs locally in your browser; neither version leaves your device.
What does similarity score mean?
Similarity shows how much of the compared text is unchanged. Higher scores mean the versions are closer; 100% means no differences with current options.
What is unified diff view?
Unified diff shows one column with + added, - removed, and unchanged lines together — like a classic patch view.
What is side-by-side diff view?
Side-by-side diff shows original and changed text in parallel columns with line numbers — best for reviewing edits row by row.
Can I download the diff result?
Yes. Use Copy Diff Results or Download .txt to save the comparison output as plain text.