Simple. Fast. Private.
Hanakash - Free Online Tools That Just Work
Fast calculators, converters, date and time tools, developer utilities, text helpers, web tools, and generators with examples and clear assumptions built into each page.
175 free tools across 7 categories.
Popular Tools
Age Calculator
PopularFind completed years, months, days, total days, and next birthday.
Area Converter
PopularConvert square meters, square feet, acres, hectares, and more.
Base64 Encode / Decode
PopularConvert plain text and Base64 in either direction.
Basic Calculator
PopularA simple arithmetic calculator for quick results.
Case Converter
PopularConvert text into common writing and developer casing styles.
Compound Interest Calculator
PopularEstimate final balance, contributions, and interest earned with compounding.
Date Difference Calculator
PopularFind exact years, months, elapsed days, inclusive days, weeks, weekdays, and weekends between two dates.
Discount Calculator
PopularFind final price and savings after a percentage discount.
Featured Tools
Start with a curated set of broadly useful tools for common calculations, conversions, and structured data tasks.
Area Converter
PopularConvert square meters, square feet, acres, hectares, and more.
Basic Calculator
PopularA simple arithmetic calculator for quick results.
JSON Formatter & Validator
PopularValidate JSON, pretty-print it, minify it, and inspect JSON paths.
Length Converter
PopularConvert common length and distance units.
Percentage Calculator
PopularFind percentages, percent change, increases, and decreases.
Temperature Converter
PopularConvert Celsius, Fahrenheit, and Kelvin temperatures.
Categories (7)
Calculators
Fast calculators for math, finance, physics, chemistry, electronics, and planning.
Converters
Convert measurements, units, encoded text, and formats.
Date & Time
Calendar and time tools for dates, durations, weekdays, and planning.
Developer Tools
Practical utilities for JSON, encoding, URLs, and web development.
Generators
Generate useful random values and identifiers locally.
Text Tools
Analyze, clean, and transform text directly in your browser.
Web Tools
Utilities for DNS, email records, HTTP headers, URLs, CSS, and SEO checks.
Recently Added
CSS Text Shadow Generator
Build layered CSS text shadows with a live preview.
Image Resizer
Resize images by pixels and download them privately.
Work-Energy Theorem Calculator
Solve net work or speed changes with the work-energy theorem.
CSS Specificity Calculator
Compare CSS selector specificity scores.
DKIM Record Generator
Build a DKIM TXT record for email signing.
DMARC Record Generator
Build a DMARC TXT record for domain email protection.
DNS Record Validator
Check DNS record values before adding them to a provider.
Email Header Analyzer
Inspect SPF, DKIM, DMARC, and delivery path headers.
Practical tools, with the explanation included
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.
Browser-first privacy
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.
Useful, not just searchable
Calculators explain inputs and results, converters document assumptions, and utilities include concrete examples. Related tools make it easy to continue the same workflow.
Free Browser Tools FAQ
What kinds of free browser tools are available on Hanakash?
Hanakash includes calculators, converters, date and time tools, developer utilities, text helpers, web tools, and generators for common browser-based tasks.
Do Hanakash tools require an account or installation?
No. Hanakash tools are free self-service utilities that run in a web browser without requiring an account or software installation.
Do tool pages explain how results are calculated?
Yes. Tool pages pair the interactive utility with instructions, examples, useful notes, assumptions, limitations, and FAQs where they help users verify the result.