Text Diff Checker
Compare two text or code snippets line-by-line to identify additions, deletions, and differences instantly in your browser.
Text comparison is computed 100% locally in your browser memory and is never uploaded online.
Text Diff Comparison
+1 additions-1 deletions
ORIGINAL TEXT
50 characters
MODIFIED TEXT
54 characters
UNIFIED LINE DIFF OUTPUT
function greet() {
+ console.log("Hello ShadTools");
- console.log("Hello World");
}
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How the Text Diff Checker works
The Text Diff Checker splits original and modified inputs by linebreaks and runs a fast line-by-line comparison algorithm to highlight added lines in green (+) and deleted lines in red (-).
Common use cases
- Code Reviews: Compare local code changes against production files before committing.
- Config Comparison: Find subtle differences between
.envfiles, JSON configs, or YAML deployments. - Copy Editing: Review revisions between draft versions of articles or contracts.
Frequently Asked Questions
Is my text data uploaded to any remote server? +
No. All text diffing and string comparisons run 100% locally inside your web browser memory.
What types of text can I compare? +
You can compare source code files (JS, Python, HTML, CSS, JSON), plain text notes, configuration files, and documentation.
Can I copy the resulting unified diff output? +
Yes. Click the Copy Unified Diff button to copy the formatted additions and deletions string to your clipboard.