Text Diff Checker
DeveloperCompare two text files and highlight differences. Perfect for code review and document comparison.
What is This Tool?
A text diff checker compares two blocks of text and highlights the differences — additions, deletions, and modifications — with color-coded side-by-side or inline views. Essential for code reviews, document comparison, configuration auditing, and merge conflict resolution.
The diff algorithm (based on Myers' algorithm or similar) finds the longest common subsequence between two texts and reports the minimal set of changes. This is the same approach used by git diff, but presented visually for easy comprehension.
Common Use Cases
Code Review
Compare code versions to review changes, spot unintended modifications, and verify bug fixes before merging.
Configuration Auditing
Compare server configs, environment files, and deployment manifests to detect unintended changes.
Document Comparison
Compare contract versions, documentation updates, and content revisions to track editorial changes.
Database Migration
Compare SQL schemas, seed data, and migration scripts between environments to verify consistency.
Frequently Asked Questions
What diff views are available?
Side-by-side (two columns) and inline (unified) views. Both highlight additions (green), deletions (red), and modifications.
Can I compare files?
Paste text from any source or upload files. The tool compares the text content regardless of the original format.
Is whitespace-only changes highlighted?
Whitespace changes can be shown or hidden. Ignoring whitespace is useful for code comparison where formatting varies.