Runs fully in your browser. Inputs stay on your device. See recent fixes on changelog.
Character-Level Diff
Compare two texts at the character level.
FreeRuns in browsercharacter diffchar comparison
1 lines
1 lines
Cmd/Ctrl+Enter Primary actionCmd/Ctrl+Shift+L Load sampleCmd/Ctrl+Shift+X Clear/resetCmd/Ctrl+Shift+C Copy result
About Character-Level Diff
Compare two texts at the character level. Compare two texts character by character online for free. Detect exact character-level differences with similarity percentage and change counts. No signup needed. Uses professional-grade diff algorithms to highlight insertions, deletions, and modifications at the line or character level. Includes statistical summaries and side-by-side visual comparison. Everything runs client-side in your browser for maximum speed and privacy — no data is sent to any server, and no signup is required.
Related tools: Text Diff Tool, Word-Level Diff, String Similarity Checker
How to Use Character-Level Diff
- Enter content in both input fields (A and B).
- The tool compares them and highlights differences.
- Review the comparison results and statistics.
Frequently Asked Questions
What is Character-Level Diff?
Compare two texts character by character online for free. Detect exact character-level differences with similarity percentage and change counts. No signup needed.
How are differences detected?
The tool uses established diff algorithms similar to those in version control systems like Git. It identifies insertions, deletions, and changes at the line or character level, depending on the comparison mode.
Can I compare large texts?
Yes, the comparison runs entirely in your browser and can handle large documents efficiently. For very large files, processing may take a moment longer, but there are no hard size limits imposed by the tool.
What comparison algorithms are used?
The tool implements the Myers diff algorithm, which is the same algorithm used by Git and other professional-grade diff tools. This ensures minimal, human-readable diffs that clearly show what changed.
Is Character-Level Diff free to use?
Yes, comparing content is entirely free with no size limits or account requirements. Everything runs in your browser.
Is my data safe when using Character-Level Diff?
Yes, both inputs stay entirely in your browser. No data is sent to any server, so your content remains private and secure.