Text Diff Online — Character-Level · Fold Unchanged · Export
Real-time diff · Character-level · AI summary · Merge mode · Timeline · Git export · 100% browser
Compare any two text documents online. Character-level diff shows exact word changes. Fold unchanged sections to focus on differences. Export as .diff, HTML, or copy unified diff to clipboard.
What is a Code Diff Checker?
A diff checker compares two versions of text or code and highlights what changed. It shows added lines in green, removed lines in red, and changed lines in amber — exactly like git diff or a pull request review on GitHub.
Key Features
This tool includes side-by-side and inline views, character-level diff highlighting (exact words that changed), three diff algorithms (Myers, Patience, Histogram), AI-powered plain English summaries, 3-way merge mode, change timeline, and multiple export formats including .diff (git patch) and HTML reports.
Frequently Asked Questions
What does "Ignore Whitespace" do?
When enabled, differences in spaces and indentation are ignored. Only actual content changes are highlighted. Useful when comparing code that was reformatted or re-indented without logic changes.
What does "Ignore Case" do?
When enabled, differences in letter case are ignored. "Hello" and "hello" are treated as equal. Useful for comparing text where capitalization may differ.