Text Diff Checker

Client-SideOffline Ready

Compare two blocks of text or code side-by-side to visually highlight additions, deletions, and changes.

Sample Diffs:
14 lines
16 lines
+6 added-4 removed
11 {
22 "name": "agentxalpha",
3- "version": "1.0.0",
3+ "version": "1.1.0",
44 "private": true,
55 "scripts": {
66 "dev": "next dev",
77 "build": "next build",
8- "start": "next start"
8+ "start": "next start",
9+ "lint": "next lint"
910 },
1011 "dependencies": {
11- "next": "^14.0.0",
12- "react": "^18.2.0"
12+ "next": "^14.2.0",
13+ "react": "^18.3.1",
14+ "tailwindcss": "^3.4.0"
1315 }
1416 }

LCS Difference Engine

Implements Longest Common Subsequence (LCS) matrix alignment to prevent insertion desync and accurately track line shifts.

Dual Mode Comparison

Toggle effortlessly between Unified Git-style patch views and Side-by-Side split dual-pane code inspection.

100% Client-Side Privacy

Diff computations and line matrix evaluations run purely in browser memory. Sensitive code or prose is never sent across networks.

Frequently Asked Questions

How does the Text Diff Checker compare two pieces of text?
It utilizes the Myers diff algorithm to identify characters, words, and lines that have been added, deleted, or modified between original and modified text blocks, displaying changes with green and red visual highlighting.
Can I switch between side-by-side split view and unified inline view?
Yes. You can toggle between a two-pane Side-by-Side comparison and a single-pane Unified view depending on your preference and screen size.
Does this tool support comparing code, JSON, and config files?
Yes. It works with raw text, source code (Python, JS, HTML), configuration files (YAML, JSON), and markdown documents with whitespace and indentation sensitivity.
Is my comparison data private?
Yes. All diff computations are executed in your browser memory. Proprietary source code and sensitive documents are never uploaded to any server.
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