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Compare & Analyze Code Differences with Visual Diff Tools
A powerful web-based tool for comparing code versions, reviewing changes, and analyzing differences between code snippets or files with real-time visualization and detailed statistics.
The Code Diff Checker is a comprehensive tool for comparing code versions, reviewing pull request changes, or analyzing differences between code snippets. With intuitive visual diff tools and detailed statistics, you can quickly understand code changes.
Tip: Use the "Load Example" button to see a sample diff in your selected language and understand how the tool works.
The tool supports multiple ways to input code for comparison, making it flexible for various workflows.
Simply paste your code directly into the text areas. The editor supports multi-line input and preserves formatting.
Click the "Upload" button or drag and drop files directly onto the input panels. Supports multiple file types up to 5MB.
Generate shareable links that include code pre-filled via URL parameters. Perfect for sharing specific comparisons.
The tool supports uploading files with these extensions:
.js.ts.py.java.cpp.cs.go.rs.php.rb.swift.kt.html.css.json.yaml.md.sql.sh.txtThe tool offers two distinct view modes for visualizing code differences, each suited to different review preferences.
Displays the original and modified code in two side-by-side panels. Changes are highlighted with red backgrounds for removed lines and green backgrounds for added lines.
Best for: When you need to see the full context of both versions and understand exactly what changed in each location.
Shows all changes in a single continuous stream, similar to git diff output. Added lines are shown with a + prefix and green highlighting, while removed lines show with a - prefix and red highlighting.
Best for: Quick reviews and when you prefer the traditional git-style diff format.
Customize your diff experience with various features and settings to match your workflow.
Use the search bar to find specific text within the diff. Search terms are highlighted across both code panels.
Toggle to ignore whitespace-only changes, focusing only on meaningful code modifications.
When enabled, scrolling one panel automatically scrolls the other, keeping changes aligned and easier to review.
Enable word wrapping for long lines to view code without horizontal scrolling. Useful for diffs with long strings or URLs.
The tool provides comprehensive statistics about the code differences, helping you quickly understand the scope of changes.
Added
Lines
Removed
Lines
Unchanged
Lines
Total Changes
Count
Change Rate
Percentage
Export your diff results in multiple formats for documentation, reporting, or integration with other tools.
Export as a formatted Markdown document with syntax-highlighted code blocks.
# Code Diff ReportExport as a standalone HTML file with embedded styles, ready to share or archive.
<html>...</html>Export as structured JSON data for programmatic use or API integration.
{"language": "...", ...}Speed up your workflow with keyboard shortcuts for common actions.
| Action | Shortcut |
|---|---|
| Export Diff | Ctrl + S |
| Copy to Clipboard | Ctrl + K |
| Reset All | Ctrl + R |
Note: Keyboard shortcuts use Cmd key on macOS (⌘) and Ctrl key on Windows/Linux.
The tool supports syntax highlighting for a wide range of programming languages and file formats.
Review pull request changes, compare function implementations, or validate refactoring modifications before merging.
Compare working and broken code to identify what changed and locate potential bugs or regressions.
Compare different implementations, understand code evolution, or review algorithm improvements.
Generate diff reports for changelogs, version history, or technical documentation with export options.
Compare configuration files, environment settings, or deployment configurations across environments.
Share specific code comparisons with team members via shareable links for collaborative review.
Compare plain text and documents with character-level diff highlighting
Format, validate, and convert JSON data with syntax highlighting
Write, run, and test code in multiple languages with live execution
Test and debug regular expressions with real-time matching