Developer Tools

Generate secure BIP39 passphrases from mnemonics and restore original seed phrases. Validates mnemonics, provides passphrase derivation with interactive UI for blockchain developers.

Generate HTTP Basic Authentication headers by combining username and password into Base64-encoded format. Perfect for API testing, server configuration, and development.

Generate one or multiple RFC 4122 version 4 UUIDs instantly. Features input validation, network fallback for entropy, and user feedback. Perfect for developers.

Generate bcrypt hashes with configurable salt rounds and verify text against existing hashes. Essential developer tool for secure password storage and authentication.

Measure JavaScript execution speed with our benchmark builder. Run timed performance tests across multiple iterations to optimize your code efficiency and identify bottlenecks.

Developer tool for creating, validating, and understanding cron expressions. Generate cron schedules with easy range selection and get human-readable explanations of your timing patterns.

Display information about the user device and browser.

Interactive directional derivative calculator for multivariate functions. Enter functions and direction vectors, compute gradients, and get step-by-step results with error handling and mathematical validation.

Convert Docker run commands to Docker Compose YAML instantly. Handles ports, volumes, environment variables, networks, and restart policies. Simplify container orchestration.

Free online tool to parse and numerically compute double integrals over rectangular regions. Input your function and x/y bounds for quick results.

Interactive Git cheatsheet with search functionality. Quickly find common Git commands, descriptions, and examples. Essential reference for developers and version control.

Comprehensive HTTP status code reference tool for developers. Search, browse and understand status codes with detailed explanations, categories, and usage examples.

Free online tool to compute cryptographic hash digests (MD5, SHA-1, SHA-256, SHA-512, SHA3, RIPEMD160) for any text input. Supports algorithm selection with result length display.

Free online tool to convert hexadecimal numbers to binary representation instantly. Perfect for developers working with color codes, memory addresses, and low-level programming tasks.

Convert IPv4 addresses between decimal, hexadecimal, and binary formats instantly. Validate IP addresses with real-time feedback and error notifications.

Calculate IPv4 subnet details instantly. Parse CIDR notation to get network address, broadcast address, subnet mask, host range, and number of available hosts per subnet.

Generate RFC 4193 compliant IPv6 ULA prefixes (fd00::/8), /48 and /64 network addresses from seeds using FNV-1a hashing with random entropy for development and networking.

Calculate IRR from cash flows with this developer-focused tool. Accurate financial analysis for investment evaluation and ROI calculations in your applications.

Calculate implicit derivatives step-by-step. Enter equations in x and y, compute dy/dx, and evaluate the derivative at specific points. Perfect for calculus students and developers.

Compute inverse Laplace transforms instantly using symbolic polynomial arithmetic. Supports complex expressions with variable substitution and displays results in both plain text and LaTeX formats.

Compare two JSON objects side-by-side. Instantly identify added, removed, and modified properties with visual highlighting. Perfect for developers and API testing.

Convert JSON to YAML format instantly with input validation, example data loading, and real-time feedback. Perfect for developers working with configuration files and data serialization.

Free online JWT parser tool to decode JSON Web Tokens. View header, payload, and signature details with validation and error handling. No installation required.

Display keyboard keycode information when a key is pressed.

Calculate love compatibility between two names with our interactive tool. Get fun percentage-based results and custom messages instantly. Perfect for developers and fun projects.

Generate multiple valid MAC addresses with optional prefix. Format and validate MAC addresses instantly. Perfect for network testing, development, and system configuration.

Comprehensive MIME types database and lookup tool. Quickly find file extensions, identify content types, and understand internet media types for web development.

Generate monotonically increasing ULIDs (Universally Unique Lexicographically Sortable Identifiers) for proper time-based ordering. Create batch ULIDs for database keys, identifiers, and sorting.

Generate and validate TOTP/HOTP codes from secret keys. Customize algorithm (SHA1/SHA256/SHA512), digits (6-8), and time step. Perfect for 2FA development.

Free online tool to generate Open Graph and Twitter Card meta tags. Create perfect social media previews for Facebook, Twitter, LinkedIn with custom titles, descriptions, and images.

Free online tool to evaluate 5-card poker hands instantly. Input your cards and get hand rankings (High Card, Flush, Straight, etc.) with React component code for developers.

Generate RSA public and private key pairs in PEM format with custom key sizes. Free online tool for developers working with encryption and security.

Comprehensive regex cheatsheet with syntax reference, common patterns, and examples. Perfect for developers, data analysts, and anyone working with text patterns.

Free online SQL prettifier that normalizes keyword casing, spacing, and formatting while safely handling comments and string literals. Perfect for developers.

Free online tool that parses algebraic expressions and computes symbolic partial derivatives. Ideal for calculus students, engineers, and developers working with mathematical computations.

Generate secure random tokens with customizable length and character sets. Choose uppercase, lowercase, numbers, symbols, or create custom character pools for developer needs.

Free online user agent parser tool that analyzes browser strings to extract detailed information about browser, engine, OS, device type, brand, model, and CPU with JSON output.

Free online IBAN validator and parser. Validate IBAN numbers against country-specific rules with mod 97 check, extract country code, BBAN, check digits, and normalize IBAN format.

Generate MD5, SHA1, SHA256, and SHA512 hashes from text

Convert between Unix timestamps and human-readable dates with multiple format options.

Identifies the hashing algorithm used for a given hash string with confidence levels.

Generate secure passwords with customizable options

Encode and decode text using Base64 encoding

Format, minify, and validate JSON data

Generate QR codes for text, URLs, and other data

Convert between HEX, RGB, and HSL color formats

Generate random strings with custom length and character sets

Generate UUIDs and GUIDs in various formats

Check for invalid or malformed rows and missing headers

Generate barcodes from text input