Developer Tools & Utilities
Essential utilities for web developers and software engineers. Format JSON, test regular expressions, encode/decode Base64 and URLs, work with JWTs, and more — all in your browser with instant results.
Our developer tools are built for speed and convenience. No login required, no data sent to servers, no rate limits. Process your data locally and get instant results for common development tasks.
Tools in This Topic
JSON Formatter
Beautify and format JSON data instantly online.
JSON Validator
Check if your JSON is valid in one click.
Regex Tester
Test regex patterns with live matching and highlighting.
URL Encoder
Encode URLs and strings with percent-encoding online for free.
URL Decoder
Decode URL-encoded strings online for free.
JWT Decoder
Decode JWT tokens online instantly and securely.
Base64 Encoder
Convert text to Base64 encoding online for free.
Base64 Decoder
Decode Base64 strings to plain text online for free.
Timestamp Converter
Convert Unix epoch timestamps to dates online for free.
JSON to CSV Converter
Convert JSON to CSV online for free — instant and accurate.
SQL Formatter
Format and beautify SQL queries instantly online.
Color Picker
Pick and convert colors between HEX, RGB, and HSL formats.
Markdown to HTML
Convert Markdown to HTML online for free.
HTML to Markdown
Convert HTML to Markdown online for free.
XML to JSON
Convert XML to JSON online for free.
JSON to XML
Convert JSON to XML online for free.
HTML Formatter
Format and beautify HTML code with proper indentation.
HTML Minifier
Minify and compress HTML code to reduce file size.
CSS Minifier
Minify and compress CSS code to reduce file size.
JavaScript Minifier
Minify and compress JavaScript code to reduce file size.
Hash Generator
Generate MD5, SHA-1, SHA-256, and other hash values from text.
MD5 Generator
Generate MD5 hash from text or files quickly and securely.
SHA-256 Generator
Generate SHA-256 hash from text or files securely.
CSV Viewer
View and preview CSV files with a clean table interface.
JSON Diff Checker
Compare two JSON objects and highlight differences.
CSS Formatter
Format and beautify CSS code with proper indentation.
YAML to JSON
Convert YAML to JSON format instantly online.
JSON to YAML
Convert JSON to YAML format instantly online.
Binary Converter
Convert between binary, decimal, octal, and hexadecimal.
Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin.
HEX to RGB
Convert HEX color codes to RGB format instantly.
RGB to HEX
Convert RGB color values to HEX format instantly.
Binary to Text
Convert binary code to text and decode binary data.
Text to Binary
Convert text to binary code and encode data.
HTML Entities Encoder
Encode special characters to HTML entities.
HTML Entities Decoder
Decode HTML entities back to special characters.
Base64 Image Encoder
Convert images to Base64 encoded data URI strings.
DNS Lookup
Lookup DNS records and domain information online.
IP Address Lookup
Find your IP address and lookup IP information.
Unicode Converter
Convert text to Unicode and Unicode to text.
URL Parser
Parse and analyze URL components.
ENV Generator
Generate .env files online for free.
Cron Parser
Parse cron expressions online for free.
Nginx Config Generator
Create nginx config files online for free.
Htaccess Generator
Create .htaccess files online for free.
Docker Compose Generator
Create docker-compose files online for free.
UUID Validator
Validate UUIDs online for free.
HTTP Header Parser
Parse HTTP headers online for free.
Hex to Decimal Converter
Convert hex to decimal
Roman Numeral Converter
Convert Roman numerals
Number Base Converter
Convert number bases
Text to Binary Converter
Convert text to binary code online.
Binary to Text Converter
Decode binary code to text online.
Length & Distance Converter
Convert length units
CSS Gradient Generator
Generate CSS gradients visually
Timezone Converter
Convert between world timezones
Meme Generator
Create memes with custom text
Random Name Generator
Generate random names
Number to Words Converter
Convert numbers to written words
IP Address Lookup Tool
Find your public IP address
Epoch & Unix Timestamp Converter
Convert Unix timestamps to dates
Credit Card Validator Tool
Validate credit card numbers
Kilogram to Gram Converter
Convert kg to g online for free.
Kilogram to Milligram Converter
Convert kg to mg online for free.
Kilogram to Pound Converter
Convert kg to lb online for free.
Kilogram to Ounce Converter
Convert kg to oz online for free.
Kilogram to Metric Ton Converter
Convert kg to t online for free.
Kilogram to Stone Converter
Convert kg to st online for free.
Gram to Milligram Converter
Convert g to mg online for free.
Gram to Pound Converter
Convert g to lb online for free.
Gram to Ounce Converter
Convert g to oz online for free.
Gram to Metric Ton Converter
Convert g to t online for free.
Gram to Stone Converter
Convert g to st online for free.
Milligram to Pound Converter
Convert mg to lb online for free.
Milligram to Ounce Converter
Convert mg to oz online for free.
Milligram to Metric Ton Converter
Convert mg to t online for free.
Milligram to Stone Converter
Convert mg to st online for free.
Pound to Ounce Converter
Convert lb to oz online for free.
Pound to Metric Ton Converter
Convert lb to t online for free.
Pound to Stone Converter
Convert lb to st online for free.
Ounce to Metric Ton Converter
Convert oz to t online for free.
Ounce to Stone Converter
Convert oz to st online for free.
Metric Ton to Stone Converter
Convert t to st online for free.
Millimeter to Centimeter Converter
Convert mm to cm online for free.
Millimeter to Meter Converter
Convert mm to m online for free.
Millimeter to Kilometer Converter
Convert mm to km online for free.
Millimeter to Inch Converter
Convert mm to in online for free.
Millimeter to Foot Converter
Convert mm to ft online for free.
Millimeter to Yard Converter
Convert mm to yd online for free.
Millimeter to Mile Converter
Convert mm to mi online for free.
Centimeter to Meter Converter
Convert cm to m online for free.
Centimeter to Kilometer Converter
Convert cm to km online for free.
Centimeter to Inch Converter
Convert cm to in online for free.
Centimeter to Foot Converter
Convert cm to ft online for free.
Centimeter to Yard Converter
Convert cm to yd online for free.
Centimeter to Mile Converter
Convert cm to mi online for free.
Meter to Kilometer Converter
Convert m to km online for free.
Meter to Inch Converter
Convert m to in online for free.
Meter to Foot Converter
Convert m to ft online for free.
Meter to Yard Converter
Convert m to yd online for free.
Meter to Mile Converter
Convert m to mi online for free.
Kilometer to Inch Converter
Convert km to in online for free.
Kilometer to Foot Converter
Convert km to ft online for free.
Kilometer to Yard Converter
Convert km to yd online for free.
Kilometer to Mile Converter
Convert km to mi online for free.
Inch to Foot Converter
Convert in to ft online for free.
Inch to Yard Converter
Convert in to yd online for free.
Inch to Mile Converter
Convert in to mi online for free.
Foot to Yard Converter
Convert ft to yd online for free.
Foot to Mile Converter
Convert ft to mi online for free.
Yard to Mile Converter
Convert yd to mi online for free.
Square Meter to Square Foot Converter
Convert m² to ft² online for free.
Square Meter to Hectare Converter
Convert m² to ha online for free.
Square Meter to Acre Converter
Convert m² to ac online for free.
Square Meter to Square Kilometer Converter
Convert m² to km² online for free.
Square Meter to Square Mile Converter
Convert m² to mi² online for free.
Square Foot to Hectare Converter
Convert ft² to ha online for free.
Square Foot to Acre Converter
Convert ft² to ac online for free.
Square Foot to Square Kilometer Converter
Convert ft² to km² online for free.
Square Foot to Square Mile Converter
Convert ft² to mi² online for free.
Hectare to Acre Converter
Convert ha to ac online for free.
Hectare to Square Kilometer Converter
Convert ha to km² online for free.
Hectare to Square Mile Converter
Convert ha to mi² online for free.
Acre to Square Kilometer Converter
Convert ac to km² online for free.
Acre to Square Mile Converter
Convert ac to mi² online for free.
Square Kilometer to Square Mile Converter
Convert km² to mi² online for free.
Milliliter to Liter Converter
Convert ml to L online for free.
Milliliter to Gallon (US) Converter
Convert ml to gal online for free.
Milliliter to Cup Converter
Convert ml to cup online for free.
Milliliter to Pint (US) Converter
Convert ml to pt online for free.
Milliliter to Quart (US) Converter
Convert ml to qt online for free.
Milliliter to Tablespoon Converter
Convert ml to tbsp online for free.
Milliliter to Teaspoon Converter
Convert ml to tsp online for free.
Liter to Gallon (US) Converter
Convert L to gal online for free.
Liter to Cup Converter
Convert L to cup online for free.
Liter to Pint (US) Converter
Convert L to pt online for free.
Liter to Quart (US) Converter
Convert L to qt online for free.
Liter to Tablespoon Converter
Convert L to tbsp online for free.
Liter to Teaspoon Converter
Convert L to tsp online for free.
Gallon (US) to Cup Converter
Convert gal to cup online for free.
Gallon (US) to Pint (US) Converter
Convert gal to pt online for free.
Gallon (US) to Quart (US) Converter
Convert gal to qt online for free.
Gallon (US) to Tablespoon Converter
Convert gal to tbsp online for free.
Gallon (US) to Teaspoon Converter
Convert gal to tsp online for free.
Cup to Pint (US) Converter
Convert cup to pt online for free.
Cup to Quart (US) Converter
Convert cup to qt online for free.
Cup to Tablespoon Converter
Convert cup to tbsp online for free.
Cup to Teaspoon Converter
Convert cup to tsp online for free.
Pint (US) to Quart (US) Converter
Convert pt to qt online for free.
Pint (US) to Tablespoon Converter
Convert pt to tbsp online for free.
Pint (US) to Teaspoon Converter
Convert pt to tsp online for free.
Quart (US) to Tablespoon Converter
Convert qt to tbsp online for free.
Quart (US) to Teaspoon Converter
Convert qt to tsp online for free.
Tablespoon to Teaspoon Converter
Convert tbsp to tsp online for free.
Meters per Second to Kilometers per Hour Converter
Convert m/s to km/h online for free.
Meters per Second to Miles per Hour Converter
Convert m/s to mph online for free.
Meters per Second to Knot Converter
Convert m/s to kn online for free.
Kilometers per Hour to Miles per Hour Converter
Convert km/h to mph online for free.
Kilometers per Hour to Knot Converter
Convert km/h to kn online for free.
Miles per Hour to Knot Converter
Convert mph to kn online for free.
Byte to Kilobyte Converter
Convert B to KB online for free.
Byte to Megabyte Converter
Convert B to MB online for free.
Byte to Gigabyte Converter
Convert B to GB online for free.
Byte to Terabyte Converter
Convert B to TB online for free.
Byte to Petabyte Converter
Convert B to PB online for free.
Kilobyte to Megabyte Converter
Convert KB to MB online for free.
Kilobyte to Gigabyte Converter
Convert KB to GB online for free.
Kilobyte to Terabyte Converter
Convert KB to TB online for free.
Kilobyte to Petabyte Converter
Convert KB to PB online for free.
Megabyte to Gigabyte Converter
Convert MB to GB online for free.
Megabyte to Terabyte Converter
Convert MB to TB online for free.
Megabyte to Petabyte Converter
Convert MB to PB online for free.
Gigabyte to Terabyte Converter
Convert GB to TB online for free.
Gigabyte to Petabyte Converter
Convert GB to PB online for free.
Terabyte to Petabyte Converter
Convert TB to PB online for free.
Second to Minute Converter
Convert s to min online for free.
Second to Hour Converter
Convert s to h online for free.
Second to Day Converter
Convert s to d online for free.
Second to Week Converter
Convert s to wk online for free.
Second to Month (30 days) Converter
Convert s to mo online for free.
Second to Year (365 days) Converter
Convert s to yr online for free.
Minute to Hour Converter
Convert min to h online for free.
Minute to Day Converter
Convert min to d online for free.
Minute to Week Converter
Convert min to wk online for free.
Minute to Month (30 days) Converter
Convert min to mo online for free.
Minute to Year (365 days) Converter
Convert min to yr online for free.
Hour to Day Converter
Convert h to d online for free.
Hour to Week Converter
Convert h to wk online for free.
Hour to Month (30 days) Converter
Convert h to mo online for free.
Hour to Year (365 days) Converter
Convert h to yr online for free.
Day to Week Converter
Convert d to wk online for free.
Day to Month (30 days) Converter
Convert d to mo online for free.
Day to Year (365 days) Converter
Convert d to yr online for free.
Week to Month (30 days) Converter
Convert wk to mo online for free.
Week to Year (365 days) Converter
Convert wk to yr online for free.
Month (30 days) to Year (365 days) Converter
Convert mo to yr online for free.
Degree to Radian Converter
Convert ° to rad online for free.
Degree to Gradian Converter
Convert ° to grad online for free.
Radian to Gradian Converter
Convert rad to grad online for free.
Bar to PSI Converter
Convert bar to psi online for free.
Bar to Kilopascal Converter
Convert bar to kPa online for free.
Bar to Atmosphere Converter
Convert bar to atm online for free.
PSI to Kilopascal Converter
Convert psi to kPa online for free.
PSI to Atmosphere Converter
Convert psi to atm online for free.
Kilopascal to Atmosphere Converter
Convert kPa to atm online for free.
Joule to Calorie Converter
Convert J to cal online for free.
Joule to Kilowatt-hour Converter
Convert J to kWh online for free.
Joule to BTU Converter
Convert J to BTU online for free.
Calorie to Kilowatt-hour Converter
Convert cal to kWh online for free.
Calorie to BTU Converter
Convert cal to BTU online for free.
Kilowatt-hour to BTU Converter
Convert kWh to BTU online for free.
Random Password Generator
Generate secure random passwords
Yes or No Generator
Random Yes/No decision maker
Random Team Generator
Generate random balanced teams
Learn More
Developer Productivity
JSON in Modern Development
JSON (JavaScript Object Notation) is the universal data format for APIs, configuration files, and data exchange. A good JSON formatter makes raw API responses readable, validates structure, highlights syntax errors, and helps debug data issues quickly.
Regular Expressions
Regex is one of the most powerful tools in a developer's toolkit. Pattern matching, text extraction, validation, and find-and-replace operations all rely on regular expressions. A visual regex tester with real-time matching makes building and debugging patterns dramatically easier.
Encoding and Decoding
Base64 encoding converts binary data to text for embedding in HTML/CSS/JSON. URL encoding ensures special characters are safely transmitted in URLs. HTML encoding prevents XSS attacks by escaping special characters. Understanding these encodings is fundamental to web development.