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Query String to JSON Converter — Free Online

Free query string to JSON converter. Paste a URL or ?a=1&b=2 string. Handles repeated keys, nested filters[year]= syntax.

Query String to JSON Converter

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About this tool

Smarter than URLSearchParams

Repeated keys (?tag=js&tag=ts) collapse into arrays. PHP-style brackets (filters[year]=2026&filters[author]=ada) produce nested objects. Values that look like numbers or booleans get coerced. Paste a full URL — the query bit is extracted automatically.

How to use the Query String to JSON Converter

Takes about a minute. No signup, no download, your data stays in your browser.

  1. 1
    Open the tool. Scroll up to the Query String to JSON Converter above — it loads instantly in your browser, no install needed.
  2. 2
    Enter your values. The fields come pre-filled with realistic defaults so you can see how it works — replace them with your own numbers.
  3. 3
    Read the result. The output updates instantly. Copy or share it — nothing is uploaded to a server, everything stays on your device.

Frequently asked questions

Common questions about the Query String to JSON Converter.

Is the Query String to JSON Converter free to use?

Yes. The Query String to JSON Converteron 7BusyBoss is completely free — no signup, no paywall, no usage cap.

Do I need to sign up to use the Query String to JSON Converter?

No. The Query String to JSON Converterworks instantly in your browser — no account needed. Signing in with Google is optional and only unlocks features like saving favorites and higher AI build limits.

Does the Query String to JSON Converter work on mobile?

Yes. Every tool on 7BusyBoss is mobile-responsive and works in any modern browser — Chrome, Safari, Firefox, Edge — on phones, tablets and desktops.

Is my data safe when I use the Query String to JSON Converter?

Yes. The Query String to JSON Converterruns entirely in your browser — your inputs never leave your device unless the tool explicitly fetches public data (e.g. currency rates). We don't store the values you type.

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