JSON Formatter & Validator
Paste JSON to pretty-print, minify or validate it — with precise error positions when something's wrong.
Validate before you debug
A misplaced comma or an unquoted key is the cause of a surprising share of API integration bugs. Pasting a payload here immediately tells you whether it's syntactically valid JSON and, if not, where the parser gave up — usually much faster than reading a stack trace.
Formatting options
Two-space indentation is the most common convention in web development; four spaces or tabs suit codebases that use them elsewhere. Minifying strips all insignificant whitespace, which is useful when embedding JSON in a URL or shrinking a config file. Key sorting produces a stable order that makes two payloads easy to compare in a diff tool.
Frequently asked questions
Is my JSON sent to a server?
No. Parsing and formatting run entirely in your browser using the built-in JSON engine — data never leaves your device, so it's safe for payloads containing secrets.
Does it support comments or trailing commas?
No — this tool validates strict JSON per the specification, matching what APIs and JSON.parse accept. JSON5 extensions like comments will be reported as errors.