General Calculators
Everyday calculators for common tasks. Calculate dates, ages, time differences, and more with simple, intuitive tools.
All General Calculators
Showing 24 of 24 calculators
JSON to YAML Converter
Convert JSON to YAML online — fast, free, browser-side. Paste JSON, get clean YAML with correct...
Cron Expression Parser
Parse and translate cron expressions to human-readable text instantly. See next run times, valida...
YAML to JSON Converter
Convert YAML to JSON online — fast, free, browser-side. Paste any YAML and get clean JSON with ...
Base64 Encoder/Decoder
Encode text to Base64 or decode Base64 to readable text instantly. Supports standard and URL-safe...
Case Converter
Convert text to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_cas...
Word Counter
Count words, characters, sentences, paragraphs, and estimate reading time instantly. Live updates...
JSON Formatter
Format, validate, and minify JSON online. Pretty print with customizable indentation, syntax high...
CSV to JSON Converter
Convert CSV to JSON online — fast, free, browser-side. Paste CSV, get clean JSON arrays with ty...
Date Calculator
Calculate days between two dates, add or subtract days from a date, find business days excluding ...
Diff Checker
Compare two pieces of text, code, JSON, YAML or any plain-text file side by side. The diff checke...
URL Encoder/Decoder
Encode or decode URLs, query strings, and special characters instantly. Supports percent encoding...
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text instantly. Compare hash values, copy r...
QR Code Generator
Generate QR codes instantly for URLs, text, WiFi credentials, email, phone numbers, and vCards. C...
JWT Decoder
Decode and inspect JWT tokens instantly. View header, payload, claims, expiration time, and issue...
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and dates to Unix timestamps instantly. Shows cur...
Password Strength Calculator
Check how strong your password is with our free password strength calculator. See entropy bits, e...
Age Calculator
Calculate your exact age in years, months, and days from your date of birth. Find out how old you...
Regex Tester
Test and debug regular expressions with live match highlighting, capture groups, flags support, a...
Time Zone Converter
Convert time between different time zones instantly. Compare multiple cities, plan international ...
Markdown to HTML Converter
Convert Markdown to clean HTML instantly with GitHub Flavored Markdown support, live side-by-side...
AI Token Calculator
Calculate AI token count, cost, and usage for OpenAI GPT-4o, Claude, Gemini, and other LLMs. Conv...
Cost Calculator
A generic cost and price calculator with three modes. Find the price per unit and compare two pro...
Working Days Calculator
Use our free working days calculator to count the number of business days between two dates or ad...
Aspect Ratio Calculator
Calculate aspect ratios from pixel dimensions, find missing width or height, and resize images wh...