A collection of free online tools for developers
Professional Bcrypt password encryption tool with customizable work factor. Generate and verify password hashes securely. Free online password encryption service.
Professional online hash generator supporting MD5, SHA1, SHA256, SHA512, and more algorithms. Quickly calculate hash values for text and files with hash comparison feature.
Professional HMAC generator tool supporting MD5, SHA1, SHA256, SHA512, and more algorithms. Secure message integrity verification service.
Professional RSA key pair generator with multiple key sizes and passphrase protection. Secure key generation service for encryption and digital signatures.
Professional random token generator with customizable length and character types, supports batch generation. Secure token generation service for API keys, security tokens, and more.
Professional text encryption and decryption tool supporting AES, CBC, GCM and more algorithms with multiple output formats. Secure online encryption service to protect your sensitive data.
Professional UUID generator supporting v1/v3/v4/v5 versions with namespace and custom options. Secure and reliable unique identifier generation service.
Professional ULID (Universally Unique Lexicographically Sortable Identifier) generator with batch generation support. Provides timestamp parsing and multiple format conversions.
Generate and verify BIP39 mnemonic phrases with multiple languages and passphrase support
Professional password strength analysis tool that checks password complexity, evaluates crack difficulty, and provides security recommendations. Supports checking password length, special characters, case sensitivity, and multiple security factors.
Professional PDF document digital signature verification tool, supporting multiple signature checks, providing detailed signature information and certificate chain verification. Secure and reliable online signature verification service.
Generate Time-based One-Time Passwords (TOTP) and HMAC-based One-Time Passwords (HOTP) online, compatible with Google Authenticator
Generate HTTP Basic Authentication headers and command line tool commands for cURL, HTTPie, and Wget
Decode and parse JWT tokens online, view header, payload and signature
Convert between timestamps and datetime formats online
Online base conversion tool, supporting conversion between binary, octal, decimal, and hexadecimal numbers
Online tool for converting between Arabic numbers and Roman numerals
Convert between text and Base64 encoding online
Online tool for converting between images and Base64 strings, supporting Data URI format
Online tool for converting between HEX, RGB, and HSL color formats
Online text case converter tool supporting various formats including lowercase, uppercase, camelcase, pascalcase, and more
Convert text to NATO phonetic alphabet representation online
Convert between text and binary format online
Convert between text and Unicode encoding online
Convert between YAML and JSON formats online
Convert between YAML and TOML formats online
Convert between different list formats including Array, JSON, YAML, XML, HTML, CSV, Markdown and more
Convert between XML and JSON formats online
Convert between Markdown and HTML formats online
Encode and decode URLs and URL components online
Convert between text and HTML entities online, supporting both named and numerical entities
Parse URL components online including protocol, host, port, path, query parameters and more
Detect and display detailed information about current device and browser, including system, browser, screen, network and more
Generate Open Graph Meta tags online to optimize your website's appearance on social media platforms
Look up file MIME types and their corresponding extensions, search by MIME type or extension
View detailed keyboard event information in real-time, including keyCode, key, code and more
Convert text to URL-friendly format with custom separator and case options
Create and edit HTML content with a visual editor supporting rich text formatting
A comprehensive list of HTTP status codes with detailed descriptions and explanations.
Compare two JSON objects and find the differences between them. Easily identify added, removed, and changed values.
Decode safelinks and extract the original URLs. Support for various safelink formats and URL encoding methods.
Normalize and standardize email addresses by removing dots, tags, and converting to lowercase
Generate customizable QR codes for URLs, text, and more. Adjust size, colors, and error correction levels.
Generate QR codes for WiFi networks. Easily share WiFi access details through scannable QR codes.
Generate customizable SVG placeholder images for your projects. Adjust size, colors, text and more.
Compress and optimize multiple images online. Reduce file size while maintaining quality.
Crop and adjust your images online. Supports various aspect ratios and formats.
Convert images between different formats (JPEG, PNG, WebP, AVIF) online. Batch convert multiple images at once.
View detailed information about your images, including dimensions, file size, format, EXIF data and dominant colors.
Easily split images into 3x3 grid format for social media
Quick reference for common Git commands with examples
Generate random network port numbers with customizable ranges and system port exclusion
Visual Crontab expression generator to help you create and understand Linux scheduled tasks
Format, validate and minify JSON data with customizable indentation
Convert JSON data to CSV format online
Format and beautify SQL queries with syntax highlighting
Calculate Unix file permissions with an interactive CHMOD calculator
Convert Docker run commands to Docker Compose YAML format
Format and beautify XML documents with syntax highlighting
Format and beautify YAML documents with syntax highlighting
Test and debug regular expressions with real-time matching and group highlighting
Collection of commonly used regular expression patterns with examples and explanations
Calculate network address, broadcast address, usable hosts and more for IPv4 subnets
Online tool to convert between IPv4 addresses, decimal, binary, and hexadecimal formats
Convert IPv4 address ranges to the best matching CIDR notation, calculate network and broadcast addresses
Look up vendor and manufacturer information for any MAC address
Generate random MAC addresses with custom prefix, case, and separator options
Generate local non-routable IPv6 ULA addresses according to RFC4193
Calculate IPv6 subnet information including network address, broadcast address, and usable address range
Convert between different network units, supporting both speed and data units with binary and decimal calculations
Convert IPv6 addresses between different formats, supporting standard, binary, and hexadecimal
Calculate Variable Length Subnet Masks (VLSM) to divide networks based on host requirements
Calculate optimal route aggregation for multiple IP ranges or CIDR blocks, check overlaps and conflicts
Generate ACL (Access Control List) configurations for Cisco and Huawei network devices. Support both standard and extended ACL with common templates.
Calculate VLAN ranges and associated subnet information for network planning.
Generate VLAN configurations for Cisco and Huawei switches. Support both access and trunk ports with common templates.
Calculate complex mathematical expressions with support for advanced functions like sqrt, sin, cos, log, and more.
Calculate estimated time of arrival (ETA) based on total size, completed size and current speed.
Calculate percentages, find percentage of a number, calculate percentage changes and increases/decreases.
Convert between different units of measurement including length, area, volume, weight, and temperature.
Calculate loan payments, compound interest, return on investment (ROI), and generate amortization schedules.
Calculate area, perimeter, volume and surface area of various 2D and 3D geometric shapes.
Generate random numbers, secure passwords, random samples, and simulate dice rolls.
Calculate fraction operations, simplify fractions, convert to decimals and percentages with step-by-step explanations.
Convert numbers between different number systems including binary, octal, decimal, hexadecimal, and more.
Calculate basic statistics, analyze distributions, and perform correlation analysis with visual representations.
Calculate trigonometric functions, inverse functions, hyperbolic functions and convert between different angle units.
Simple online timer with milliseconds support, pause, resume and reset functions
Online temperature conversion tool supporting Kelvin, Celsius, Fahrenheit, Rankine, Delisle, Newton, Réaumur and Rømer scales
Simple online benchmark builder to easily compare task execution times
Online length conversion tool supporting Metric, Imperial, Astronomical, Nautical and Chinese traditional units
Online weight conversion tool supporting Metric, Imperial and Chinese traditional units
Online time conversion tool supporting microseconds, milliseconds, seconds, minutes, hours, days, weeks, months, years and more
View current time in major cities around the world including Beijing, Tokyo, London, New York and more
Generate Lorem Ipsum placeholder text for design and typography
Analyze text and count characters, words, lines, byte size and more
Easily copy and paste emojis, and get Unicode and code point values for each emoji
Obfuscate strings (like passwords, IBANs, or tokens) to make them shareable and recognizable without revealing their content
Create ASCII art text with many fonts and styles
Compare differences between two texts and highlight the changes