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JSON Formatter
Beautify, minify and validate JSON right in your browser. No uploads, nothing leaves your device.
Tools · Developer FormattingPopularRegex Tester
Live matches, capture groups and a replace preview for JavaScript regex.
Tools · Developer FormattingPopularBase64 Encoder / Decoder
Convert text or files to Base64 and back, with correct UTF-8 handling.
Tools · Encoding & DecodingPopularURL Encoder / Decoder
Percent-encode or decode URLs and parameter values, plus a query breakdown.
Tools · Encoding & DecodingPopularNumber Base Converter
Binary, octal, decimal and hex — exact, at any size.
Tools · Encoding & DecodingPopularUnix Timestamp Converter
Convert Unix seconds or milliseconds to dates and back, in your timezone or UTC.
Tools · Calculation & ConversionPopularIP Range to CIDR Converter
Turn an IP range into the smallest CIDR set, or a CIDR block back into its range. IPv4 and IPv6.
Tools · Calculation & ConversionPopular
