Developer tools that run in your browser
// no signup · no tracking · 100% client-side
calculators
(7)Aspect Ratio Calculator
Calculate and convert aspect ratios for images, video, and screens.
Character Counter
Count characters, words, sentences, and paragraphs in real time.
Chmod Calculator
Calculate Linux file permissions in numeric and symbolic notation.
Word Counter
Count words, sentences, paragraphs with keyword density analysis.
Percentage Calculator
Calculate percentages instantly — find percent of a number, percentage change, and more.
Age Calculator
Calculate your exact age in years, months, and days from your date of birth.
Date Calculator
Find the difference between two dates or add/subtract days from a date.
encoders
(5)Base64 Encode/Decode
Encode text to Base64 or decode Base64 strings instantly in your browser.
HTML Entity Encoder/Decoder
Encode and decode HTML entities in named, decimal, or hex format.
URL Encode/Decode
Encode or decode URLs and query strings instantly in your browser.
JWT Decoder
Decode and inspect JSON Web Tokens — view header, payload, and expiration.
Image to Base64 Converter
Convert images to Base64 encoded strings
generators
(8)Color Palette Generator
Generate beautiful color palettes with harmony modes.
Lorem Ipsum Generator
Generate placeholder text for your designs and mockups.
Password Generator
Generate secure random passwords with customizable options.
UUID Generator
Generate random UUIDs (v4) instantly. Bulk generate, validate, and copy.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text or files.
Cron Expression Generator
Build cron expressions visually — free, instant, no signup
ASCII Art Generator
Convert text to ASCII art — free, instant, no signup required
Text Repeater
Repeat any text multiple times instantly
formatters
(7)CSS Minifier
Minify CSS to reduce file size and improve load times.
JSON Formatter
Format, validate, and minify JSON data instantly in your browser.
HTML Formatter
Beautify or minify HTML code with proper indentation in one click.
XML Formatter
Beautify or minify XML with proper indentation in one click.
JavaScript Formatter
Beautify or minify JavaScript code with proper indentation.
SQL Formatter
Beautify or minify SQL queries with proper indentation and keyword casing.
Markdown Editor
Write Markdown with instant live preview
validators
(5)Diff Checker
Compare two texts and highlight the differences line by line.
JSON Path Finder
Click any JSON node to generate its JSONPath expression instantly.
JSON Validator
Validate JSON syntax and inspect structure with detailed error reporting.
Regex Tester
Test and debug regular expressions with real-time match highlighting.
YAML Validator
Validate YAML syntax and convert between YAML and JSON.
converters
(18)Hex to ASCII Converter
Convert between hexadecimal and ASCII text instantly.
JSON to CSV Converter
Convert JSON arrays to CSV format with nested object support.
JSON to YAML Converter
Convert between JSON and YAML formats instantly in your browser.
Text to Binary Converter
Convert text to binary, hex, octal, or decimal and back.
TOML to JSON Converter
Convert TOML configuration files to JSON format instantly.
Unix Timestamp Converter
Convert Unix timestamps to human dates and vice versa.
RAL Color Converter
Convert between RGB, HEX, CMYK, and RAL colors instantly.
Case Converter
Convert text between uppercase, lowercase, camelCase, snake_case, and more.
CSV to JSON Converter
Convert CSV files and data to JSON format instantly in your browser.
Morse Code Translator
Translate text to Morse code and back — with audio playback.
Hex Color Picker
Pick any color and instantly get hex, RGB, and HSL codes — free, no signup
Roman Numeral Converter
Convert numbers to Roman numerals and back — free, instant, no signup
Binary to Decimal Converter
Convert binary, octal, decimal, and hex numbers instantly — free, no signup
Number to Words Converter
Convert any number to its English word representation instantly.
Color Converter
Convert colors between HEX, RGB, HSL, and CMYK formats instantly.
JSON to XML Converter
Convert JSON data to well-formed XML instantly
Text to HTML Converter
Convert plain text to clean HTML paragraphs
XML to JSON Converter
Convert XML data to clean JSON instantly