json-formatter

Format, validate, and transform JSON data. Paste JSON or point to a file.

Usage

Format this JSON: [paste JSON]
Validate [file.json]
Convert [file.json] to CSV
Minify this JSON
Sort keys in [file.json]

What it does

• Pretty print — indent with 2 or 4 spaces, colorized output
• Validate — check JSON syntax, report exact line/column of errors
• Minify — remove whitespace for production
• Sort keys — alphabetically sort all object keys
• Query — extract values using JSONPath (e.g., $.store.book[*].author)
• Convert to CSV — convert flat JSON arrays to CSV
• Merge — combine multiple JSON files

Examples

• "Format this: {"a":1,"b":2}" → pretty-printed with 2-space indent
• "Validate config.json and report errors"
• "Convert users.json to CSV"
• "Extract all email addresses from data.json using $.[*].email"
• "Sort all keys in manifest.json"

Notes

• Handles large files (up to 50MB)
• Auto-detects if input is already valid JSON
• For JSONPath, uses jsonpath library syntax
• Merge: arrays are concatenated, objects are deep-merged