All Developer Tools
74 free tools. No signup. No data upload. Runs in your browser.
JSON Tools
JSON to TypeScript
Convert JSON to TypeScript interfaces instantly. Free online JSON to TS type generator with nested object support.
JSON Formatter & Minifier
Format, beautify, and minify JSON online. Free JSON formatter with syntax validation and error highlighting.
JSON Validator
Validate JSON syntax with detailed error reporting including line and column numbers. Free online JSON validator with instant feedback and structure analysis.
JSON Minifier
Minify JSON by removing whitespace, line breaks, and indentation. Free online JSON minifier with size comparison and savings display.
JSON Viewer
View JSON as an interactive collapsible tree with color-coded types. Free online JSON viewer with expand/collapse nodes and type highlighting.
JSON Diff
Compare two JSON strings and highlight differences line by line. Free online JSON diff tool with added, removed, and changed line detection.
JSON Sorter
Sort JSON object keys alphabetically with recursive nesting support. Free online JSON key sorter for consistent, predictable JSON output.
JSON Escape/Unescape
Escape and unescape JSON strings. Handle newlines (\n), tabs (\t), quotes (\"), backslashes (\\) and Unicode. Free online JSON string escaper.
Text Tools
Remove Duplicate Lines
Remove duplicate lines from text instantly. Free online deduplication tool with options for case sensitivity and sorting.
Slug Generator
Convert any text to a URL-friendly slug. Free online slug generator with options for separator and transliteration.
Case Converter
Convert text between camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE and more. Free online case converter.
Lorem Ipsum Generator
Generate Lorem Ipsum placeholder text by paragraphs, sentences, or words. Free online Lorem Ipsum generator with customization.
Text Diff Checker
Compare two texts and highlight differences instantly. Free online diff checker with line-by-line comparison.
Word Counter
Count words, characters, sentences, paragraphs, and estimate reading time instantly. Free online word counter with real-time stats.
Text Sorter & Reverser
Sort lines alphabetically, by length, reverse order, or shuffle randomly. Free online text sorter with multiple sorting modes.
Text Truncator
Truncate text to a specified length with optional ellipsis. Free online text truncator with customizable max length.
Character Counter
Count characters with and without spaces, letters, digits, and special characters in real time. Free online character counter with detailed statistics.
Line Counter
Count total lines, blank lines, and non-blank lines in your text instantly. Free online line counter with detailed line statistics.
Reading Time Calculator
Calculate estimated reading time (200 WPM) and speaking time (130 WPM) for your text. Free online reading time calculator with word count.
Remove Empty Lines
Remove blank and empty lines from text instantly. Free online tool to clean up text by removing empty lines with customizable options.
Trim Whitespace
Trim leading and trailing whitespace, trim each line, and collapse multiple spaces. Free online whitespace trimmer with customizable options.
Find and Replace
Find and replace text with support for case-sensitive, whole word, and regex matching. Free online find and replace tool with live preview.
Encoding Tools
Base64 Encode & Decode
Encode text to Base64 or decode Base64 to text. Free online Base64 encoder and decoder with instant conversion.
ROT13 Encoder/Decoder
Encode or decode ROT13 text instantly. Free online ROT13 cipher tool with real-time conversion.
Morse Code Translator
Translate text to Morse code and vice versa. Free online Morse code translator with audio playback.
URL Encoder/Decoder
Encode or decode URL components instantly. Free online URL encoder and decoder for special characters.
Binary Converter (Text to Binary)
Convert text to binary and binary to text instantly. Free online binary converter with encode and decode modes.
ASCII Converter
Convert between ASCII characters and their decimal, hexadecimal, and binary code values. Free online ASCII table converter.
HTML Entity Encoder/Decoder
Encode or decode HTML entities instantly. Free online HTML entity encoder for special characters.
Image to Base64
Convert images to Base64 data URIs instantly. Free online image to Base64 converter with drag-and-drop. Supports PNG, JPG, GIF, WebP, SVG.
Text to Hex Converter
Convert text to hexadecimal and back instantly. Free online text to hex converter with space-separated bytes and UTF-8 support.
Hex to Text Converter
Convert hexadecimal to readable text instantly. Free online hex to text converter with UTF-8 support. Paste hex and get text back.
Unicode Escape/Unescape
Convert Unicode characters to \uXXXX escape sequences and back. Free online Unicode escape unescape tool with surrogate pair support.
JSON String Escape/Unescape
Escape and unescape strings for JSON. Handle newlines, quotes, backslashes, and tabs. Free online JSON string escape tool.
Code Formatters
CSS Minifier & Beautifier
Minify CSS to reduce file size or beautify CSS for readability. Free online CSS minifier with size comparison and instant conversion.
JS Minifier & Beautifier
Minify JavaScript to reduce file size or beautify JS for readability. Free online JavaScript minifier using Terser with size comparison.
SQL Formatter
Format and beautify SQL queries online. Free SQL formatter supporting MySQL, PostgreSQL, SQL Server, and more. Instant conversion.
XML Formatter & Beautifier
Format and beautify XML documents online. Free XML formatter with minification support. Instant conversion with proper indentation.
HTML Formatter & Beautifier
Format and beautify HTML with proper indentation. Free online HTML formatter for messy or minified HTML. Instant conversion.
HTML Minifier
Minify HTML by removing whitespace, comments, and optional characters. Free online HTML minifier with size savings display.
CSS Formatter & Beautifier
Format and beautify minified CSS with proper indentation. Free online CSS formatter for readable stylesheet output. Zero dependencies.
JavaScript Formatter & Beautifier
Format and beautify JavaScript with proper indentation. Free online JS formatter based on braces and brackets. Zero dependencies.
Development Tools
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa. Free online timestamp converter with current time display.
Regex Tester
Test regular expressions online with real-time matching and group extraction. Free regex tester with flags support.
Markdown Previewer
Preview Markdown text as rendered HTML in real-time. Free online Markdown previewer with live conversion and syntax highlighting.
Security Tools
JWT Decoder
Decode and inspect JWT tokens instantly. Free online JWT decoder with header, payload, and expiration analysis.
Basic Auth Generator
Generate and decode HTTP Basic Authentication headers instantly. Free online Basic Auth header generator.
Hash Generator (MD5, SHA)
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes online. Free hash generator with instant computation.
Bcrypt Hash Generator
Generate and verify bcrypt hashes online. Free bcrypt password hash generator with configurable cost rounds.
Password Generator
Generate strong, random passwords with configurable length and character types. Free online password generator with strength indicator.
Password Strength Checker
Check password strength instantly with detailed feedback. Free online password strength checker with security tips.
AES Encrypt & Decrypt
Encrypt and decrypt text using AES-256-GCM encryption. Free online AES encryption tool with PBKDF2 key derivation. 100% client-side.
Data Conversion
CSV to JSON Converter
Convert CSV to JSON format online. Free tool with support for custom delimiters, headers, and pretty-print output.
YAML to JSON Converter
Convert YAML to JSON and vice versa. Free online YAML/JSON converter with syntax validation and pretty-print.
Number Base Converter
Convert numbers between binary, octal, decimal, hexadecimal and any base (2-36). Free online number base converter.
HTML to Markdown
Convert HTML to Markdown format instantly. Free online HTML to MD converter for clean text extraction.
JSON to CSV Converter
Convert JSON data to CSV format instantly. Free online JSON to CSV converter with automatic header detection and nested object flattening.
Web & SEO Tools
HTTP Status Codes Reference
Complete reference for HTTP status codes with descriptions. Search and browse all status codes from 100 to 5xx.
URL Parser
Parse any URL into protocol, hostname, port, path, query parameters, and hash. Free online URL parser with structured table output.
Query String Parser
Parse URL query strings into key-value pairs with decoded values. Free online query string parser that handles encoded parameters.
Meta Tag Generator
Generate HTML meta tags for your website including title, description, viewport, charset, robots, and author. Free online meta tag generator with instant preview.
Open Graph Preview
Preview how your URL appears when shared on Facebook, LinkedIn, and Twitter. Generate Open Graph and Twitter Card meta tags. Free online OG preview tool.
Robots.txt Generator
Generate robots.txt files for your website with allow/disallow rules for different user-agents. Free online robots.txt generator with sitemap support.
UTM Builder
Build UTM tracking URLs for Google Analytics. Enter your URL and UTM parameters (source, medium, campaign, term, content). Free online UTM link builder.
Frontend Tools
Color Tools
DevOps Tools
Cron Expression Parser
Parse and explain cron expressions with human-readable descriptions. Free online cron parser with next run times.
Chmod Calculator
Calculate Unix file permissions with visual checkbox interface. Free online chmod calculator for numeric and symbolic modes.
Docker Run to Compose
Convert docker run commands to docker-compose.yml format instantly. Free online Docker Compose converter with YAML output.
IPv4 Subnet Calculator
Calculate IPv4 subnet information from CIDR notation. Free online subnet calculator showing network address, broadcast, usable hosts, and mask.
Generators
UUID Generator
Generate UUIDs (v4) online. Free bulk UUID generator with options for uppercase, no dashes, and custom count.
Timetable Generator
Create your class timetable in 30 seconds. Free online timetable generator with PNG export. No signup required.
QR Code Generator
Generate QR codes for URLs, text, and more. Free online QR code generator with customizable colors, size, and error correction. Download as PNG.