JSON/XML formatter

Format, validate, and beautify JSON and XML files.

Format

Action

Indent2 spaces

Indent with spaces

Sort keys (JSON)

Remove comments (JSON)

InputEmpty

Open file

Output

About JSON/XML formatter

JSON and XML Formatter validates, indents, and compacts structured text, and points straight at the syntax error when there is one.

Runs entirely in your browser. Your files never leave your device.

1.Paste the whole document and pick JSON or XML.
2.Validate it, then use the reported position to fix the quote, comma, nesting, tag, or entity that is wrong.
3.Format it to read, or compact it to ship, then parse it again wherever it is going.

Pretty printing adds indentation and line breaks. Compact strips the whitespace back out.
Validation knows the difference between JSON tokens and XML elements, attributes, declarations, and entities.

Valid syntax says nothing about whether the data matches a schema or makes business sense.
A very large document uses a lot of browser memory, and there is no streaming.

Can it repair broken JSON for me?

It shows you where the problem is. Guessing a missing value or comma could change what the document means, so the fix is yours.

Does it resolve external XML entities?

Do not rely on it. Check namespaces and schema behavior in the system that consumes the file.