Text Diff
Compare differences between two texts or code snippets instantly. Supports split view, inline view, and ignore whitespace.
Diff Checker Use Cases
Frequently Asked Questions
Q. Which algorithm should I choose (Myers vs Patience)?
Myers is fast and standard for most cases. Patience/Histogram are better for large refactors as they focus on unique lines.
Q. How do I handle whitespace differences (CRLF vs LF)?
Use the "Ignore Whitespace" toggle to focus only on content changes rather than line ending or indentation shifts.
Q. What is the difference between Split and Inline view?
Split view shows files side-by-side, while Inline view combines changes into a single vertical stream.
Q. Is there a file size limit for comparison?
You can compare files up to 10MB comfortably. Larger files may impact browser performance.
Q. Can I export the differences as a patch file?
Yes, you can copy or download the diff result in standard GNU Patch/Diff format.
Diff Algorithms Comparison
| Algorithm | Core Trait | Speed | Accuracy |
|---|---|---|---|
| Myers | Standard / Greedy | Very Fast | High |
| Patience | Focus on Unique Lines | Moderate | Very High |
| Histogram | Optimized Patience | Fast | Very High |
| Heckel | Move detection | Fast | Medium |
| Wu/Manber | Shortest Edit Script | Ultra Fast | High |
Line vs Word vs Character Diff
When to use which granularity.
Source Code / Structured Data
Articles / Documentation / Prose
Short IDs / Hex / CSS Colors
Logic-heavy scripts (JS/Python)
Large Refactors / Moved Functions
✔ Use Line-level diff for 90% of programming tasks.
✔ Use Word-level diff when proofreading translations or documents.
✔ Toggle character diff to find tiny typos in long strings.
✔ Ignore whitespace when indentation doesn't affect logic.
Key Features
- Split-pane side-by-side comparison
- Unified inline diff view
- Automatic indentation and syntax detection
- 100% private local processing (No data sent to server)
Professional online text diff tool. Compare two texts or code files side-by-side to find differences instantly with 100% privacy.