Are my private files or code snippets sent to any server?

Never. All text diffing, line matching, and rendering happen 100% locally inside your browser memory. Your proprietary source code and sensitive documents remain completely confidential.

Can I compare large files and codebases?

Yes! The in-memory LCS algorithm efficiently handles thousands of lines of source code, JSON payloads, and SQL queries directly on your device CPU.

What does Unified View mean?

Unified View presents changes in a single continuous linear stream where added lines are prefixed with + (green) and removed lines are prefixed with - (red), identical to git diff terminal output.

Side-by-Side Code & Text Diff Comparison Checker

Compare text, code, and JSON side-by-side or unified with character-level additions and deletions.

Security Guarantee: 100% Client-Side In-Browser Execution. Computations run locally within browser RAM. Zero remote telemetry.

Technical Overview & Architecture

A lightning-fast, private client-side text and code diff comparison tool. Utilizes the Myers Longest Common Subsequence (LCS) algorithm to compute line additions, deletions, and modifications with Side-by-Side split view and Unified patch view 100% inside your browser.

The comparison engine constructs an edit graph using Longest Common Subsequence (LCS) dynamic programming, identifying identical line matches while isolating additions (+) and deletions (-) into synchronized line containers.

Key Capabilities & Features

Side-by-Side & Unified Views: Switch between two-column split comparison and unified linear patch view with line numbers.
Myers Diff Algorithm: Computes optimal edit sequences to accurately isolate changes, insertions, and deletions.
Whitespace & Case Controls: Optionally ignore trailing spaces, indentation changes, and case sensitivity to focus purely on meaningful changes.
100% Private & In-Memory: Safely diff confidential source code, database dumps, proprietary JSON, and API tokens without sending a single byte to external servers.

Step-by-Step Usage Guide

Paste Original & Modified Text: Enter your original (before) text on the left and modified (after) text on the right.
Select View & Comparison Settings: Choose Side-by-Side or Unified view and adjust whitespace or case sensitivity toggles.
Inspect & Copy Diff: Review color-coded additions and deletions and copy the unified patch with one click.

Frequently Asked Questions (FAQ)

Are my private files or code snippets sent to any server?: Never. All text diffing, line matching, and rendering happen 100% locally inside your browser memory. Your proprietary source code and sensitive documents remain completely confidential.
Can I compare large files and codebases?: Yes! The in-memory LCS algorithm efficiently handles thousands of lines of source code, JSON payloads, and SQL queries directly on your device CPU.
What does Unified View mean?: Unified View presents changes in a single continuous linear stream where added lines are prefixed with + (green) and removed lines are prefixed with - (red), identical to git diff terminal output.