URL-decode JSON
URL-decode encoded JSON back into readable formatted JSON instantly. Free online JSON URL decoder with validation. No si
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How to Use URL-decode JSON
- Paste encoded JSON: Paste a URL-encoded JSON string into the input box, or load the sample.
- Click URL-decode: Press the URL-decode JSON button. Percent sequences are decoded, then the JSON is validated and beautified.
- Copy the JSON: Copy the formatted JSON output for reading or reuse.
About URL-decode JSON
URL-decode JSON reverses percent-encoding and returns formatted, readable JSON.
- Auto-Decode: %7B, %22 and all percent sequences are decoded automatically.
- Validation: The decoded content is checked and beautified as JSON.
- Clean Output: Indented JSON you can read, copy and reuse instantly.
Perfect for inspecting encoded query params, redirect payloads and form submissions.
Frequently Asked Questions
What does URL-decoding JSON do?
It reverses percent-encoding (%7B back to {, %22 back to ") and then validates and beautifies the decoded JSON for easy reading.
Where do URL-encoded JSON strings come from?
Query strings, form submissions, redirects and logs often contain encoded JSON payloads that this tool makes readable.
Is decoding private?
Yes — everything runs in your browser. No encoded data is ever sent to a server.