Loading page
Preparing the tool workspace...
Loading page...
Preparing the tool workspace...
Fast calculators, converters, developer utilities, and text tools that run in your browser whenever possible.
104 free tools across 7 categories.
Find completed years, months, days, total days, and next birthday.
Convert square meters, square feet, acres, hectares, and more.
Convert plain text and Base64 in either direction.
A simple arithmetic calculator for quick results.
Convert text into common writing and developer casing styles.
Estimate final balance, contributions, and interest earned with compounding.
Find years, months, days, total days, and weeks between dates.
Get the total days between two dates, with inclusive and exclusive counts.
Fast calculators for everyday math, finance, and planning.
Convert measurements, units, encoded text, and formats.
Calendar and time tools for dates, durations, weekdays, and planning.
Practical utilities for JSON, encoding, URLs, and web development.
Generate useful random values and identifiers locally.
Analyze, clean, and transform text directly in your browser.
Utilities for URLs, web data, and browser-friendly workflows.
Solve average acceleration, velocity, or time.
Calculate and compare four useful types of averages.
Build and understand HTTP Cache-Control directives.
Combine capacitors in series or parallel and calculate equivalent capacitance.
Convert Unix file permissions between octal and rwx notation.
Check WCAG text contrast ratios for two web colors.
Understand each field in a five-field cron schedule.
Build layered CSS box shadows with a live preview.
Hanakash is built for people who want to finish a task without installing software or creating an account. Each tool page pairs the interactive utility with instructions, examples, useful notes, and answers to common questions so you can understand what the result means instead of seeing an unexplained output.
Tools are designed to process data locally in your browser whenever practical. Tool pages explain important limitations so you can decide whether a utility is appropriate for your data.
Calculators explain inputs and results, converters document assumptions, and developer utilities include concrete examples. Related tools make it easy to continue the same workflow.