What does this tool do?
Paste JSON below to convert it into JSON5 format. Everything runs locally using JavaScript in your browser — nothing you paste or upload is ever sent to a server.
How to use this tool
- Paste your your json into the left-hand box.
- Click Convert to JSON5.
- Copy the json5 output from the right-hand box.
Frequently asked questions
What changes in the output?
The structure stays the same; JSON5 formatting conventions like unquoted keys where possible are applied by the underlying JSON5 serializer.
Is JSON5 valid JSON?
Standard strict JSON is always valid JSON5, but not every JSON5 document is valid JSON — JSON5 is a superset with more relaxed, human-friendly syntax.
Where is JSON5 used?
Config files for tools like Babel and some build systems accept JSON5 for a more forgiving, comment-friendly authoring experience.