Developer tools
JSON formatter & validatorPretty-print, minify and validate JSON with the error position.JSON ⇄ CSV converterArray of objects to CSV (Excel-ready) and CSV back to JSON.Base64 encode / decodeUTF-8 safe Base64 and Base64URL.URL encode / decode & parserEncode/decode URL components and break a URL into its parts and query parameters.JWT decoderDecode header and payload locally, with expiry in readable time (no verification).Regex testerTest a regular expression: all matches, groups and positions.HTML escape / unescapeEscape text for HTML or decode entities back to text.Cron expression explainerExplain a 5-field cron expression and list its next run times.IP subnet calculator (CIDR)Network, broadcast, mask, host range and count for IPv4 CIDR.UUID / GUID generatorRandom version-4 UUIDs, in bulk.