Development tools

    Formatters, calculators and references for daily dev work.

    JSON formatter

    Prettify, minify and validate JSON, with optional key sorting.

    SQL formatter

    Format SQL for a specific dialect with consistent indentation and casing.

    XML formatter

    Prettify or minify an XML document.

    YAML formatter

    Validate and re-indent a YAML document.

    Crontab generator

    Build a cron expression and read back what it means in plain English.

    Chmod calculator

    Convert between symbolic and octal Unix file permissions.

    Docker run to Compose

    Convert a docker run command into a docker-compose service definition.

    Random port generator

    Pick random TCP ports outside the well-known and commonly used ranges.

    Regex tester

    Test a regular expression against sample text and inspect every match group.

    Regex cheatsheet

    Quick reference for regular expression syntax, classes and flags.

    Git cheatsheet

    The Git commands you keep forgetting, grouped by what you are trying to do.

    Emoji picker

    Search emoji and copy the character, code point or HTML entity.

    Everything here runs on your machine

    These 12 development tools are plain client-side JavaScript served as static files. There is no backend to receive what you paste, no account to create and no usage limit. Open your browser's network panel while you work and you will see the page load, then nothing else.