Free JSON and data tools
Format and validate JSON, convert between JSON, YAML and CSV, convert timestamps and number bases, and generate UUIDs.
12 tools, all free with no sign-up.
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JSON formatter & validator
Validate JSON and pretty-print or minify it.
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JSON ⇄ YAML converter New
Convert JSON to YAML and YAML to JSON.
In your browser -
CSV ⇄ JSON converter New
Turn a CSV table into JSON, or a JSON array back into CSV.
In your browser -
Number base converter New
Convert whole numbers between binary, octal, decimal, hex and any base from 2 to 36.
In your browser -
Unix timestamp to date
Convert a Unix timestamp to a readable date in several formats.
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Date to Unix timestamp
Convert a date and time (UTC) to a Unix timestamp.
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UUID v4 generator
Generate random version-4 UUIDs.
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URL parser
Break a URL into its parts and query parameters.
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User agent parser
Detect the browser, OS and device from a user agent string.
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File MIME type checker
Detect a file's real MIME type from its contents, not its extension.
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Image to Base64
Encode an image as a Base64 data URI for CSS or HTML.
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Base64 to image
Decode a Base64 string or data URI back into an image file.