JSON Formatter
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Format, validate and minify JSON instantly. Processed in your browser, never sent to a server.
JSON Formatter / Validator
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Guide
What is JSON?
JSON is a lightweight key-value data format used by APIs, configs and many data pipelines.
Common JSON errors
Missing commas, missing quotes, or mismatched brackets are the most common causes.
When formatting helps
Pretty JSON is easier to debug and review in code diff tools. Minified JSON is better for compact transfer.
JSON and CSV conversion
Array JSON can be converted to CSV and CSV can be converted to JSON arrays. Validate structure first for safer conversion.