URL-encoded JSON Decoder
Decode URL-encoded payloads or query parameter values back into readable JSON. Once the payload is readable again, send it to the JSON Formatter or JSON Validator.
Encoded Input
Decoded JSON
Keep the debugging flow moving
Decoding is usually the first step in a broader JSON debugging session. Move directly into the next tool while the payload is still in front of you.
Format the decoded JSON
Move straight into readable formatting once the payload has been decoded successfully.
Validate the decoded JSON
Check the syntax explicitly when the decoded value still looks suspicious.
Convert the decoded JSON to YAML
Use the JSON to YAML converter when the decoded payload needs to move into config workflows.
How this decoder works
This tool decodes percent-encoded text and then confirms that the result is real JSON before showing the output.
What this decoder handles
The decoder is for the common debugging case where a JSON payload was percent-encoded into a URL, callback parameter, log snippet, or redirect value.
It decodes the text and then verifies that the result is real JSON instead of just returning an unreadable raw string.
When it is useful
- Inspecting encoded callback or redirect payloads.
- Reading JSON packed into query parameters.
- Debugging logs or browser traces that show encoded payload fragments.
Privacy and browser execution
Decoding and JSON parsing happen in the browser worker. The encoded payload stays in the current session.
Related Tools
Move between formatting, validation, schema checks, JSONPath queries, decoding, conversion, minifying, generation, and diffing without leaving the JSON cluster.
JSON Formatter
Beautify raw JSON with readable indentation and a clean copy flow.
JSON Validator
Check JSON syntax, surface parse errors, and pinpoint where it breaks.
JSON Schema Validator
Validate JSON data against a JSON Schema and inspect failing rules quickly.
JSONPath Tester
Run JSONPath queries against a payload and inspect matched values with paths.
JSON to YAML
Convert valid JSON into readable YAML for config and infrastructure workflows.
JSON Minifier
Compress valid JSON into a single line by removing extra whitespace.
JSON Schema Generator
Generate a starter JSON Schema from a representative JSON sample.
JSON Diff
Compare two JSON objects and highlight the differences.
FAQ
Related Guides
Short reference pages for the syntax issues and workflows around JSON formatting and validation.