String JSON to JSON
Convert escaped JSON strings back to formatted, readable JSON in one click. Handles stringified JSON, double-encoding, and validation. 100% free, private, and runs in your browser.
Formatted JSON will appear here
String JSON to JSON — parse escaped JSON online
Need to convert a string JSON to JSON? FormatList's free online tool takes escaped or stringified JSON strings and turns them into clean, formatted JSON instantly. Whether you're debugging an API response, cleaning up a database export, or working withJSON.stringify() output, this tool handles it all.
The tool automatically detects outer quotes, unescapes backslash sequences, and parses the result into properly indented JSON. It even spots double-encoded JSON — where a JSON object was stringified twice — and resolves it in a single step.
What is a stringified JSON string?
When you call JSON.stringify() on an object, you get a JSON string. If you then JSON.stringify() that result again — or wrap it in quotes in code — you end up with an escaped string that looks like "{\"name\":\"John\"}". This tool reverses that process, turning it back into readable JSON.
Why use this tool?
- Parse escaped JSON strings instantly — no manual unescaping needed.
- Auto-detects and resolves double-encoded JSON.
- Built-in validation with clear error messages.
- One-click copy to clipboard — works on desktop and mobile.
- Runs fully in your browser, nothing is uploaded to any server.
Common use cases
- API debugging — parse stringified JSON from API responses or logs.
- Database exports — clean up JSON strings stored in SQL or NoSQL databases.
- Log files — extract and format JSON from application log entries.
- Configuration files — convert escaped JSON config values into readable format.
- Data migration — transform string-encoded JSON during ETL pipelines.
How to convert string JSON to JSON
- Paste your escaped JSON string into the input box on the left.
- The tool parses and formats it instantly — no extra clicks needed.
- Review the formatted JSON output on the right.
- Click Copy to copy the result to your clipboard.
String JSON to JSON FAQ
What is a string JSON to JSON converter?
It's a tool that takes an escaped or stringified JSON string — where quotes are backslash-escaped and the whole value is wrapped in quotes — and converts it back into properly formatted, readable JSON.
How do I convert an escaped JSON string to JSON online?
Paste your escaped JSON string into the input box. The tool automatically unescapes, parses, and formats it into indented JSON. Click Copy to grab the result.
What is double-encoded JSON?
Double-encoding happens when `JSON.stringify()` is called on an already-stringified JSON value. For example, an object gets stringified once to become a JSON string, then that string gets stringified again — resulting in extra backslash escapes. This tool detects and resolves that automatically.
Will it validate my JSON?
Yes. If the input can't be parsed as valid JSON, the tool shows an error message with details about what went wrong. This helps you spot and fix issues like missing quotes, trailing commas, or bad escape sequences.
Is my data sent to a server?
No. All parsing and formatting happens locally in your browser using JavaScript's built-in JSON parser. Your data never leaves your computer.
Is this tool free to use?
Yes, it's free to use with no signup and no usage limits. Convert as many JSON strings as you need.
Related JSON tools
Format, validate, repair, compare, escape, and transform JSON with these browser-based tools.