Developer Tools
64 tools available
Color Picker
Pick colors visually and convert between HEX, RGB, and HSL formats.
UUID Generator
Generate cryptographically secure UUID v4 identifiers
JWT Decoder
Decode JSON Web Tokens and inspect header, payload, and signature.
Regex Tester
Test regular expressions against text and highlight matching patterns.
Financial Calculator
All-in-one financial calculator: simple interest, compound interest, loan EMI, and salary. Free online.
Unit Converter
Convert between units of weight, length, temperature, speed, and area. All conversions in one place.
Random Number Generator
Generate random numbers within a custom range
Random Color Generator
Generate random colors and provide HEX, RGB, and HSL values.
Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa
Random String Generator
Generate random strings for tokens, IDs, and testing data
SQL Formatter
Format and beautify SQL queries with proper indentation and keyword casing.
Percentage Calculator
Calculate percentages: X% of Y, percentage change, and what percent X is of Y.
Age Calculator
Calculate your exact age in years, months, and days from your birthdate.
BMI Calculator
Calculate your Body Mass Index (BMI) from weight and height.
Salary Calculator
Calculate net salary after tax deduction from gross salary.
Compound Interest Calculator
Calculate compound interest with principal, rate, time, and compounding frequency.
Loan Interest Calculator
Calculate simple loan interest based on principal, rate, and time.
Monthly Loan Payment Calculator
Calculate your monthly loan payment (EMI) based on principal, rate, and term.
Average Calculator
Calculate the mean, median, and mode of a list of numbers.
Working Days Calculator
Calculate the number of working days between two dates, excluding weekends.
Date Difference Calculator
Calculate the difference between two dates in days, weeks, months, and years.
Add Days to Date Calculator
Add or subtract days from a date to find the resulting date.
BMR Calculator
Calculate your Basal Metabolic Rate (BMR) using the Mifflin-St Jeor equation.
CM to Inches Converter
Convert centimeters to inches instantly with accurate results.
Inches to CM Converter
Convert inches to centimeters instantly with accurate results.
KG to LBS Converter
Convert kilograms to pounds instantly with accurate results.
LBS to KG Converter
Convert pounds to kilograms instantly with accurate results.
KM to Miles Converter
Convert kilometers to miles instantly with accurate results.
Miles to KM Converter
Convert miles to kilometers instantly with accurate results.
Meters to Feet Converter
Convert meters to feet instantly with accurate results.
Feet to Meters Converter
Convert feet to meters instantly with accurate results.
Ounces to Grams Converter
Convert ounces to grams instantly with accurate results.
Grams to Ounces Converter
Convert grams to ounces instantly with accurate results.
km/h to mph Converter
Convert kilometers per hour to miles per hour instantly.
mph to km/h Converter
Convert miles per hour to kilometers per hour instantly.
Square Meters to Square Feet Converter
Convert square meters to square feet instantly with accurate results.
Square Feet to Square Meters Converter
Convert square feet to square meters instantly with accurate results.
Celsius to Fahrenheit Converter
Convert Celsius to Fahrenheit instantly with accurate results.
Fahrenheit to Celsius Converter
Convert Fahrenheit to Celsius instantly with accurate results.
UUID Validator
Validate UUID strings and detect their version (v1–v5). Supports bulk validation.
Bulk UUID Generator
Generate multiple UUID v4 identifiers instantly.
JSON Escape / Unescape
Escape or unescape a JSON string for embedding in code. Handles quotes, backslashes, newlines, and unicode.
Flatten JSON
Flatten nested JSON objects into a single-level object with dot-notation keys.
Unflatten JSON
Convert a flat dot-notation JSON object back into a nested structure.
JSON Sort Keys
Sort JSON object keys alphabetically at all nesting levels.
JSON Size Calculator
Calculate the byte size of a JSON payload. Shows minified size, formatted size, and key/value counts.
Query String Parser
Parse URL query strings into JSON and convert JSON back to query strings.
XML to JSON Converter
Convert XML markup to JSON format instantly. Handles attributes, nested elements, and arrays.
JSON to XML Converter
Convert JSON data to XML format instantly. Supports custom root element and indentation.
YAML to JSON Converter
Convert YAML to JSON format instantly. Useful for CI/CD configs, Kubernetes manifests, and API specs.
JSON to YAML Converter
Convert JSON data to YAML format instantly. Useful for config files, CI/CD pipelines, and Kubernetes.
cURL to Fetch Converter
Convert cURL commands to JavaScript Fetch API code instantly.
cURL to Axios Converter
Convert cURL commands to Axios JavaScript code instantly.
JWT Expiry Checker
Check if a JWT token is expired. Shows expiry time, issued at, and time remaining.
YAML Validator
Validate YAML syntax and get detailed error messages with line numbers.
XML Validator
Validate XML syntax and structure. Checks for well-formedness and reports errors.
Email Validator
Validate email address format using RFC 5322 rules. Supports bulk validation.
URL Validator
Validate URL format and structure. Checks protocol, domain, path, and query string.
Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal bases.
File Size Converter
Convert file sizes between bytes, KB, MB, GB, TB, and more. Shows all units at once.
Unicode Escape / Unescape
Escape text to Unicode escape sequences (\uXXXX) and unescape them back to readable text.
Cron Expression Parser
Parse and explain cron expressions in plain English. Shows next run times.
HTML to JSX Converter
Convert HTML markup to JSX syntax for React. Handles class→className, for→htmlFor, and inline styles.
JSX to HTML Converter
Convert JSX syntax back to standard HTML. Handles className→class, htmlFor→for, and camelCase styles.