Number base converter
Convert integers accurately between binary, octal, decimal and hexadecimal, even with many digits.
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Developer tools
Encoding, hashing and useful everyday tools.
Your everyday toolkit
Tools for your day
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21 tools
Base64 encode & decode
Encode or decode Unicode text with Base64.
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IPv4 and IPv6 CIDR calculator
Calculate the network address, address range and address count.
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Code formatter
Format JavaScript, CSS, HTML, JSON and Markdown code.
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Color converter
Choose a color and view its HEX, RGB and HSL values.
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SHA-256 hash
Calculate a SHA-256 hash on your device.
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HTML entities
Encode and decode special HTML characters.
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IPv4 → IPv6
Convert an IPv4 address to IPv4-mapped IPv6 notation.
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JSON string encoding
Convert between text and JSON strings.
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JWT decoder and HMAC verification
Inspect token contents and verify HMAC signatures.
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Password generator
Generate passwords using secure randomness on your device.
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QR code generator
Create PNG and SVG QR codes for text, URLs and Wi-Fi networks.
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Regular expression tester
Inspect matches and groups in a JavaScript regular expression.
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Table → HTML
Convert a table copied from a spreadsheet to HTML.
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Text ↔ binary
Convert between text and binary UTF-8 bytes.
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Text ↔ decimal
Convert between text and decimal UTF-8 bytes.
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Text ↔ hexadecimal
Convert between text and hexadecimal UTF-8 bytes.
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Timestamp converter
Convert between Unix timestamps in seconds or milliseconds and dates.
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Unicode escapes
Convert between text and Unicode escapes.
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URL encode & decode
Safely encode or decode text for URLs.
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Generate UUIDs
Generate as many random UUID v4 values as you need.
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