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syntax.energy

25 tools

The toolbox.

Small utilities that load fast and do one job properly. Nothing you type is uploaded. The satire tools are at the end, filed under Satire tools, where they belong.
  • Calculators

    Scientific Calculator

    Expressions with functions, constants, degrees or radians, and history.

  • Calculators

    Date Calculator

    Days between dates, working days, add or subtract time, and exact age.

  • Developer tools

    JWT Decoder

    Decode a JSON Web Token, read its claims and expiry, verify an HMAC signature.

  • Developer tools

    Cron Expression Explainer

    Cron in plain English, with the next run times.

  • Engineering utilities

    Unit Converter

    Length, mass, pressure, energy, power, temperature and more.

  • Calculators

    Percentage Calculator

    X% of Y, what percent, change between two numbers, add or remove VAT.

  • Developer tools

    Number Base Converter

    Binary, octal, decimal and hex at once, with a bit view.

  • Developer tools

    JSON Formatter

    Format, minify and validate JSON, with the error line pointed out.

  • Developer tools

    Base64 and URL Encoder

    Encode and decode Base64, Base64URL and percent-encoding, UTF-8 safe.

  • Text utilities

    Text Analyser

    Words, characters, sentences, reading time and the words you overuse.

  • Generators

    Password Generator

    Random passwords and passphrases from your browser's secure generator.

  • Engineering utilities

    Ohm's Law and Resistors

    Solve V, I, R and P from any two, and read resistor colour bands.

  • Developer tools

    Regex Tester

    Live match highlighting, capture groups, flags and replace, with a cheat sheet.

  • Text utilities

    Text Diff Checker

    Compare two texts line by line, unified or side by side.

  • Developer tools

    Unix Timestamp Converter

    Epoch seconds and milliseconds to dates, ISO 8601 and world time zones.

  • Generators

    Hash and UUID Generator

    SHA-1, SHA-256, SHA-384 and SHA-512 hashes, plus version 4 and 7 UUIDs.

  • Generators

    QR Code Generator

    Links, text, Wi-Fi logins, email and phone numbers. Download PNG or SVG.

  • Everyday tools

    Stopwatch and Timer

    Stopwatch with laps, countdown timer and a Pomodoro focus timer.

  • Everyday tools

    Random Picker

    Pick a name, shuffle a list, split teams, roll dice, flip a coin.

  • Satire tools

    Syntax Bill

    Paste a file. Get an itemised utility bill for the waste in it.

  • Satire tools

    Excuse Generator

    Official statements for avoidable failures, with an engineering translation.

  • Satire tools

    The Lab

    A tasting note for your code and a burn-rate for your tech debt.

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