Runs locally in your browser

Tools that just work.

Converters, encoders, calculators and developer utilities. Everything runs locally in your browser — your data never leaves your device.

Converters

Units, currencies, time and more.

Currency ConverterConvert between 30 currencies using the daily reference exchange rates of the European Central Bank.Unix Timestamp ConverterConvert Unix timestamps (seconds, milliseconds, micro- and nanoseconds) to human-readable dates and back.Unit ConverterConvert length, weight, temperature, volume, area, speed, time, data size, pressure and energy units — all results at a glance.

Encoding

Base64, hex, URL encoding and text representations.

Base64 Encode / DecodeEncode text or files to Base64 and decode Base64 back to text. Supports URL-safe Base64.Text ↔ Hex / Binary / ASCIIConvert text to hexadecimal, binary, decimal and octal byte values (UTF-8) and back. Edit any field.URL Encode / DecodePercent-encode or decode text for use in URLs and inspect the parts and query parameters of a URL.

Developer

Formatters, testers and helpers for everyday coding.

JSON Formatter & ValidatorFormat, validate and minify JSON with configurable indentation and key sorting. Errors are shown with line and column.Regex TesterTest JavaScript regular expressions live: highlighted matches, capture groups, named groups and replace preview.

Network

IP addressing, subnets and network calculations.

IP Subnet CalculatorCalculate network, broadcast, netmask, wildcard and host range of an IPv4 subnet in CIDR notation, and split it into smaller subnets.

Security

Hashes, checksums and cryptographic helpers.

Hash GeneratorCalculate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes of text or files — locally, nothing is uploaded.