JSON Tools
URL Decode JSON
Decode URL-encoded JSON strings with support for percent-encoding, plus signs as spaces, and multi-level encoding. Features include auto-formatting, nested string decoding, and encoding level detection.
Updated 2025-06-12
URL Decode JSON
Decode URL-encoded JSON strings. Handles percent-encoding, plus signs as spaces, and multi-level encoding.
Load sample:
Detected encoding level: 1
Decode Options
About URL Decode JSON
This tool decodes URL-encoded (percent-encoded) JSON strings back to readable JSON. URL encoding is commonly used when passing JSON data through URLs, query parameters, or form submissions.
Features:
- Percent-encoding: Decodes %XX sequences (e.g., %7B → {)
- Plus sign handling: Optionally treats + as space (common in query strings)
- Multi-level decode: Handles double or triple encoded strings
- Nested string decode: Can decode URL-encoded values within JSON
- Auto-format: Pretty-prints the decoded JSON
Common Use Cases:
- Debugging API requests with JSON payloads in URLs
- Decoding data from browser developer tools
- Processing form data with JSON fields
- Analyzing webhook payloads