Text Diff
Compare two texts. For code and config.
Data is never sent to the server. Everything runs locally in your browser. Safe for sensitive information.
About this tool
This tool displays diff of two texts in one click. Three features: 1) Additions, deletions, changes color-coded, 2) Side-by-side or stacked layout, 3) All processing in browser—no data sent to server. Ideal for code and config comparison.
Squinting at a code review before commit or comparing config files across environments, wondering what changed? Paste them into this tool. It gives a GitHub-style, easy-to-read diff view showing at a glance what was removed and what was added. It runs entirely locally without communicating with a server, so it's safe for checking config files that might contain API keys or private in-house code.
Tool interface
Auto-updates on input (char-level for single line, line-level for multi-line)
Removed Added
Usage
- Enter two texts to compare in side-by-side or stacked layout
- Additions, deletions, changes are color-coded
- Works for code, JSON, config files
When to use
Before/after refactoring, config file changes, code review, merge conflict check.
Examples
Version A vs B diff, config.json before/after, API response comparison.
FAQ
What is text diff?
Visual comparison of two texts. Additions, deletions, changes color-coded. Useful for refactoring and code review.
How to use diff tool?
Enter two texts side by side or stacked. Additions, deletions, changes are highlighted. Works for code, JSON, config.
Diff vs Git diff?
Git diff = version control diff. This tool = compare any two texts. Use git diff for changes; this for ad-hoc comparison.
What do diff colors mean?
Typically: green=added, red=deleted, yellow/orange=changed. Varies by tool.
How to use the text diff tool?
Enter two texts side by side or top and bottom. Additions, deletions, and changes are color-coded. Works for code and config files.
How to check config file changes?
Enter the before and after config into this tool. The diff is color-coded, so you can see what changed at a glance.
Compare API responses?
Enter two JSON responses into this tool. Differences are shown visually, which is handy for debugging.
Does the diff tool send my data?
No. Everything runs in your browser. The texts you compare are never sent to a server.
How to use diff for code review?
Compare the before and after code with this tool. The changed parts become clear, making review more efficient.
How to check merge conflicts?
Compare your changes and the changes from the merge source with this tool to understand and resolve conflicts.
Is Text Diff free?
Free to use, no sign-up required.
Is data sent to a server?
Input is processed locally in your browser—nothing is sent to our servers.
Supported browsers?
Tested on recent Chrome, Edge, Firefox, and Safari.
Offline use?
Core features work offline after the first load.
vs CLI or desktop apps?
Text Diff is an install-free online alternative to CLI or desktop apps.
When to use it?
Use it when: Before/after refactoring, config file changes, code review, merge conflict check.
Usage example?
Example: Version A vs B diff, config.json before/after, API response comparison.
Main features?
Color-coded diff, Side-by-side or stacked view, Additions and deletions
How is this different from similar tools?
Text Diff runs in the browser with no install—ideal for quick checks before heavier CLI or IDE workflows.
Search keywords
text diff, diff checker, compare text online, text comparison, diff tool, code diff, compare two texts
Basic workflow
- Enter two texts to compare in side-by-side or stacked layout
- Additions, deletions, changes are color-coded
- Works for code, JSON, config files
Practical use cases
- Before/after refactoring, config file changes, code review, merge conflict check.
- This tool displays diff of two texts in one click. Three features: 1) Additions, deletions, changes color-coded, 2) Side-by-side or stacked layout, 3) All processing in browser—no data sent to server. Ideal for code and config comparison.
- Color-coded diff
- Side-by-side or stacked view
Privacy & data handling
Input is processed locally in your browser—nothing is sent to our servers.
Things to watch out for
- Treat Text Diff as a quick check — re-verify critical values in your editor or CI before shipping.
- This tool runs locally: closing the tab clears unsaved input. Copy results you need to keep.
- Very large pastes can freeze a tab briefly — wait for the result before closing the tab.