Query String ↔ JSON Converter (NO UPLOAD)

Convert URL query strings like ?a=1&b=2 to JSON (and JSON back to a query string) locally in your browser. Files never leave your browser.

Input (query string, URL, or JSON)
NO UPLOAD / Client-side only
Ready
Paste a query string/URL or JSON and choose a conversion. Nothing is uploaded.
Free — Free: up to 200 KB input. Early access: free for now. No payment required. Paid plans coming soon.
    Output
    Converted

    What this tool does

    This tool converts query strings to JSON so you can debug and automate request parameters safely. It also converts JSON objects back into a query string. Everything runs locally (NO UPLOAD).

    Common pitfalls

    Duplicate keys become arrays (e.g. tag=a&tag=b). Spaces may appear as +. If you paste a full URL, only its ?query part is used.

    Privacy & Security
    All processing happens locally in your browser. Files are never uploaded.
    Next steps (intent layers)
    Go deeper from this head-term tool: topics, playbooks, trend reports, case studies, and research.
    Encoding cluster
    Topics Playbooks Trend reports Case studies Research
    Other layers: Comparisons · Alternatives · Migrations · Benchmarks · Pillar · Guides search
    JSON cluster
    Topics Playbooks Trend reports Case studies Research
    Other layers: Comparisons · Alternatives · Migrations · Benchmarks · Pillar · Guides search
    FAQ

    Does this tool upload my files? No. All processing happens locally in your browser. Files are never uploaded.

    Is it free? Yes. Core workflow is free and privacy-first.

    What is it for? Encoding, JSON workflows: validate, convert, and troubleshoot without uploads.

    Need help? Open the Topics and Guides entrypoints for common errors and fixes:

    Errors hub Topics Guides Privacy

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