Welcome
Heron Tools is a collection of utilities to boost your productivity.
Calculator
A simple four-function calculator.
๐ขBase Converter
Convert between binary, octal, decimal, and hex in real time.
๐ผ๏ธImage Resize
Resize images to a specified size and download them.
โจCSS Formatter
Beautify or minify CSS. Choose indent style and brace placement.
โฝGas Cost Calculator
Calculate fuel cost by distance, fuel efficiency, and gas price.
๐ทBarcode Reader
Scan QR codes, JAN/EAN, Code 128, PDF 417, Aztec, DataMatrix, and many more using your camera in real time.
Browse by category
The tools are organised into 13 categories. Pick the one closest to what you need to read its overview and see everything it contains.
Calculators
Numeric calculation for study and day-to-day work โ from basic arithmetic to statistics, equations and geometry.
Convert
Convert between units โ length, weight, temperature and area, plus data sizes and specialist engineering units.
Image
Resize, crop, compress and filter images entirely inside your browser.
Programming
Everyday developer utilities โ JSON formatting, encoding conversion, hashing, regex and more.
Money
Loan repayments, savings growth, discounts and take-home pay โ the arithmetic behind personal finance decisions.
Health
Put your condition into numbers โ BMI, metabolism, heart-rate zones, hydration and sleep.
Security
Password generation, hashing, one-time passwords and HTTP security headers.
Text
Count, reformat, convert and reorder text โ the fiddly steps around working with writing.
Date & Time
Date arithmetic, business days, timers and world clocks.
Music
Tempo, pitch and acoustics calculations for playing and producing music.
Games
Random picks and probability โ wheels, dice, draws and the maths behind them.
2D Codes
Generate and read QR codes and barcodes to their published specifications.
Life
Cooking, DIY, gardening and moving โ answers to the everyday question of "how many do I need?"
About Heron Tools
Heron Tools is a collection of utilities for the small calculations, conversions and generators that come up in everyday work and hobbies โ usable straight away, with no sign-up and nothing to install. From staples like a calculator and BMI to programming tools such as QR code generation and JSON formatting, unit conversion, and measuring calculations for cooking and DIY, all 500 tools run entirely inside your browser. What you type is processed on the spot and never sent to an external server, so you can use them without worrying about your data.
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