Free Online Tools & Practical Guides

Free online calculators, converters and practical tools for finance, health, math, developers, SEO, text, design and everyday tasks.

Free calculators, converters and practical utilities. Search by task and open the right tool in seconds.

Popular Percentage Calculator QR Scanner JSON Formatter Bra Converter Word Counter
Free to use No signup Mobile friendly

BROWSE TOOLS

Popular tools for everyday tasks

Start with a common task, or filter the cards by the kind of tool you need.

Browse all tools

12 tools shown

FEATURED

A mix of calculators, text helpers, developer utilities and conversion tools.

Bra Size ConverterCompare UK, US, EU, French and Australian sizing. Attendance Percentage CalculatorCheck current attendance and future class targets. HEX to RGB ConverterConvert HEX colors to RGB or RGBA with preview. X-Robots-Tag GeneratorBuild crawler indexing and preview directives. File Name ShortenerShorten pasted file names while preserving extensions. Number to Words ConverterSpell numbers in US or British English.

WHY TOOLSZZZ

Built to get the task done quickly

Simple interfaces, direct outputs and responsive layouts without unnecessary steps.

Fast to open

Lightweight task pages with the tool placed before long explanations.

No signup

Current public tools open directly without creating an account.

Clear outputs

Results, formulas and important limitations are shown where relevant.

Works across devices

Layouts are designed for desktop, tablet and mobile use.

OTHER LANGUAGES & REGIONS

Calculator libraries in other languages

English is the default language across Toolszzz. Open another localized calculator library for its language and regional conventions.

SvenskaSweden DeutschGermany FrançaisFrance EspañolSpain NederlandsNetherlands NorskNorway DanskDenmark PortuguêsBrazil EspañolMexico DeutschAustria DeutschSwitzerland FrançaisSwitzerland 中文China РусскийRussia עבריתIsrael ItalianoItaly PolskiPoland