DocFixer

JSON Formatter & Fixer

Paste corrupted, minified or messy JSON — we'll fix and beautify it instantly.

Indent:
Ready
Input JSON
Drop a .json file here or click to upload
Formatted Output
Auto-fixed issues:
    What Was Changed 0 fixes

    How to Use

    1. Paste or upload – Paste your JSON directly or drop a .json file.
    2. Click "Format & Fix" – The tool repairs common issues and pretty-prints the result.
    3. Review fixes – Any auto-repairs are listed so you know exactly what changed.
    4. Copy or download – Grab the clean JSON in one click.

    All processing is local – your JSON never leaves your device.

    What It Fixes

    • Minified / compressed JSON — beautified with chosen indent
    • Single quotes instead of double quotes
    • Trailing commas in objects and arrays
    • JavaScript-style // comments and /* block comments */
    • Unquoted object keys
    • Missing commas between properties
    • Real-time stats: keys, depth, arrays & size
    • 100% client-side — zero privacy concerns

    Why Use This Tool?

    Private & secure

    Your JSON never leaves your browser. No cloud storage, no logging, no tracking whatsoever.

    Smart auto-repair

    Fixes common syntax mistakes automatically — even messy API responses and copy-pasted snippets.

    Free forever

    No sign-up, no watermarks, no limits. Perfect for developers, testers, and data engineers.

    Frequently Asked Questions

    🔧 Can it fix corrupted JSON?
    Yes. It auto-repairs the most common mistakes including single quotes, trailing commas, unquoted keys, and JS-style comments.
    🔒 Is my data safe?
    Absolutely. Everything runs in your browser. Your JSON is never sent to any server. You can even use the tool offline once the page is loaded.
    📐 Which indent styles are supported?
    You can choose 2-space, 4-space, or tab indentation before formatting.
    📦 Can I upload a .json file?
    Yes — drag-and-drop or click the upload zone below the input to load any .json file directly.
    📉 What does "Minify" do?
    Minify removes all whitespace and newlines, producing the most compact valid JSON — useful for APIs and storage.
    📱 Does it work on mobile?
    Yes — the dual-panel layout stacks vertically on small screens, keeping the tool fully usable on phones and tablets.

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