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    ToolnettA RaftApps Project

    Made with by RaftApps

    © 2026 Toolnett. All rights reserved.

    Free Online Diff Checker & Compare Text Online

    Compare text differences

    Verified Local Processing (100% Client-Side)

    Your data never touches our servers. All logic executes in your browser sandbox using WebAssembly (WASM). No uploads, no logging, zero data retention.

    Verify in Network Tab
    Offline-Ready Security

    Side-by-Side Diff Checker

    Compare two texts side-by-side with clear change markers

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    Support Toolnett: Go premium to remove ads and unlock advanced WASM features.

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    About Diff Checker

    Compare text and code online for free. Find exact differences between two versions instantly. 100% private browser-based tool.

    Key Features

    • Side-by-side and inline diff views
    • Highlighting of additions and removals
    • Support for large text blocks
    • Privacy: Comparisons happen in-browser

    How to Use

    1. 1Paste the original text in the left pane
    2. 2Paste the new text in the right pane
    3. 3Review the highlighted differences instantly

    Frequently Asked Questions

    Everything you need to know about Diff Checker.

    Fast & Private Online Diff Checker

    Easily compare text and code with our free tool. Whether you're a developer checking a pull request or a writer comparing drafts, our visual diff tool shows you exactly what was added or removed.

    Secure Comparison in Your Browser

    Your content is sensitive. That's why our online text comparison tool works 100% client-side. Your data is never sent to a server, providing total peace of mind while you check differences online.

    More from Text

    View category

    Translator

    Translate text into any language

    Word Counter

    Count words, characters & sentences

    Grammar Checker

    Fix grammar and spelling mistakes

    Case Converter

    Convert text to different cases

    Coming Soon: Toolnett Pro

    Level Up Your Workflow

    We're building advanced, WASM-powered features for power users. Help us prioritize by selecting what you need most.