How to use the JSON Formatter
- Paste your JSON into the input box, or open a file.
- Adjust the options if needed. The output updates as you type.
- Copy the JSON or download it as a file.
About JSON
JSON (JavaScript Object Notation) is the default data format of web APIs, package manifests and most configuration tooling. It supports objects, arrays, strings, numbers, booleans and null.
Private by design
Developer data is often sensitive: API responses, tokens, customer records, internal configs. This JSON Formatter processes everything locally in your browser tab. There is no server round-trip, no logging and no storage of your input. Prefer a native app? Read about JSON Formatter in DevT Pro.
Frequently asked questions
Is this JSON Formatter free?
Yes. This JSON Formatter is completely free to use with no sign-up, no limits and no ads inside the tool.
Is my data uploaded to a server?
No. The JSON Formatter runs entirely in your browser using JavaScript. Nothing you paste is sent to DevT Pro or any other server.
Can I use the JSON Formatter offline?
Yes. JSON Formatter is also built into DevT Pro, a native app for Mac, Windows, iPad and Linux with 120+ developer tools that work fully offline. It is a $5.99 one-time purchase with no subscription.
