Developer tools that run in your browser
// no signup · no tracking · 100% client-side
calculators
(7)Age Calculator
Calculate your exact age in years, months, and days from your date of birth.
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.
Date Calculator
Find the difference between two dates or add/subtract days from a date.
Percentage Calculator
Calculate percentages instantly — find percent of a number, percentage change, and more.
Word Counter
Count words, sentences, paragraphs with keyword density analysis.
generators
(14)ASCII Art Generator
Convert text to ASCII art — free, instant, no signup required
CSS Box Shadow Generator
Build multi-layer CSS box shadows with live preview, Material elevation presets, and one-click copy
Color Palette Generator
Generate beautiful color palettes with harmony modes.
Cron Expression Generator
Build cron expressions visually — free, instant, no signup
CSS Gradient Generator
Build linear, radial, and conic CSS gradients with live preview and one-click copy
Fancy Text Generator
Convert text into 30+ Unicode font styles for Instagram, Twitter, Discord, and more.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text or files.
CSS Loading Spinner Generator
Pick from 20 pure-CSS loaders, customize size, color, and speed, then copy the HTML and CSS.
Lorem Ipsum Generator
Generate placeholder text for your designs and mockups.
Mock Data Generator
Generate JSON, CSV, SQL, and XML test data with a custom schema — 27 field types, up to 10,000 rows.
Password Generator
Generate secure random passwords with customizable options.
QR Code Generator
Generate QR codes for URLs, WiFi, vCards, email, SMS, geo, and calendar events — fully client-side, no tracking.
Text Repeater
Repeat any text multiple times instantly
UUID Generator
Generate random UUIDs (v4) instantly. Bulk generate, validate, and copy.
encoders
(8)Base64 Encode/Decode
Encode text to Base64 or decode Base64 strings instantly in your browser.
Bcrypt Generator
Hash and verify passwords with bcrypt — fully client-side, with cost-factor benchmarking.
HMAC Generator
Compute and verify HMAC signatures (SHA-1/256/384/512) in your browser via Web Crypto.
HTML Entity Encoder/Decoder
Encode and decode HTML entities in named, decimal, or hex format.
Image to Base64 Converter
Convert images to Base64 encoded strings
JWT Decoder
Decode and inspect JSON Web Tokens — view header, payload, and expiration.
JWT Encoder
Sign and verify JWT tokens with HS256/HS384/HS512 or RS256 — fully client-side via Web Crypto.
URL Encode/Decode
Encode or decode URLs and query strings instantly in your browser.
converters
(20)Binary to Decimal Converter
Convert binary, octal, decimal, and hex numbers instantly — free, no signup
Case Converter
Convert text between uppercase, lowercase, camelCase, snake_case, and more.
Color Converter
Convert colors between HEX, RGB, HSL, and CMYK formats instantly.
CSV to JSON Converter
Convert CSV files and data to JSON format instantly in your browser.
Hex Color Picker
Pick any color and instantly get hex, RGB, and HSL codes — free, no signup
Hex to ASCII Converter
Convert between hexadecimal and ASCII text instantly.
Image Compressor
Compress JPG, PNG, and WebP images in your browser — batch up to 20 files, no upload.
JSON to CSV Converter
Convert JSON arrays to CSV format with nested object support.
JSON to Go Struct Converter
Generate idiomatic Go struct definitions from JSON — with json/bson/yaml/xml/db tags, time.Time inference, and pointer-based nullables.
JSON to XML Converter
Convert JSON data to well-formed XML instantly
JSON to YAML Converter
Convert between JSON and YAML formats instantly in your browser.
Morse Code Translator
Translate text to Morse code and back — with audio playback.
Number to Words Converter
Convert any number to its English word representation instantly.
RAL Color Converter
Convert between RGB, HEX, CMYK, and RAL colors instantly.
Roman Numeral Converter
Convert numbers to Roman numerals and back — free, instant, no signup
Text to Binary Converter
Convert text to binary, hex, octal, or decimal and back.
Text to HTML Converter
Convert plain text to clean HTML paragraphs
TOML to JSON Converter
Convert TOML configuration files to JSON format instantly.
Unix Timestamp Converter
Convert Unix timestamps to human dates and vice versa.
XML to JSON Converter
Convert XML data to clean JSON instantly
formatters
(7)CSS Minifier
Minify CSS to reduce file size and improve load times.
HTML Formatter
Beautify or minify HTML code with proper indentation in one click.
JavaScript Formatter
Beautify or minify JavaScript code with proper indentation.
JSON Formatter
Format, validate, and minify JSON data instantly in your browser.
Markdown Editor
Write Markdown with instant live preview
SQL Formatter
Beautify or minify SQL queries with proper indentation and keyword casing.
XML Formatter
Beautify or minify XML with proper indentation in one click.
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.