TToolbox
100% browser-first utilities

Useful tools.
Nothing in the way.

Fast calculators, image tools, home estimators and developer utilities. No signup. No clutter. Most tools run entirely on your device.

Explore tools
✓ Free to use✓ Mobile friendly✓ Privacy first
Toolbox

Start with a tool

Fifteen useful tools are in the first release, including passport-photo formatting, solar savings calculators and a U.S. roof-cost estimator. New ideas can plug into the same Toolbox.

Text

01

Character Counter

Count characters, words, lines and spaces instantly.

↗02

Word Counter

Count words, characters, sentences and reading time.

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Case Converter

Convert text to upper, lower, title and sentence case.

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Calculators

01

Percentage Calculator

Calculate percentages, increases, decreases and percentage change.

↗02

Tip Calculator

Calculate tips and split a bill between people.

↗03

Age Calculator

Calculate exact age from a date of birth.

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Developer

01

Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 instantly.

↗02

UUID Generator

Generate random UUID v4 identifiers instantly.

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Timestamp Converter

Convert Unix timestamps to readable dates and back.

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Everyday

01

Random Number Generator

Generate random whole numbers between any minimum and maximum.

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Images

01

Passport Photo Maker

Crop and size a passport-style photo locally in your browser.

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Home

01

US Solar Savings Calculator

Estimate home solar production, bill offset, savings and simple payback in the United States.

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Cyprus Solar Savings Calculator

Estimate photovoltaic production, electricity savings and simple payback for a Cyprus home.

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Greece Solar Savings Calculator

Estimate photovoltaic output, electricity savings and simple payback for a home in Greece.

↗04

US Roof Replacement Cost Calculator

Estimate a rough U.S. roof replacement cost range by roof size, material and complexity.

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Designed differently

Your browser does the work.

Where possible, calculations and transformations happen locally on your device. That keeps the experience quick and reduces unnecessary data collection.