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116+ free online tools — JSON formatter, Base64 encoder, UUID generator, hash calculators, SEO analyzers. No signup required.
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Browse All Developer Tools
Explore our complete collection of 116+ free tools organized by category
Formatters
Format and beautify code and data
Encoders and Decoders
Transform data between encoding formats
Base 64 Decoder
Decode Base64 encoded strings back to their original format with our free online Base64 Decoder tool. Perfect for developers working with encoded data.
Use toolBase64 Encoder / Decoder
Encode and decode Base64 strings online. Text, images, and files. Free, private, no signup.
Use toolHTML Decoder
Use toolHTML Encoder
Use toolURL Decoder
Use toolURL Encoder
Encode text for URLs. Convert special characters into URL-safe format for valid and secure web addresses.
Use tool
Generators
Generate IDs, passwords, and sample data
Generate mock data
Use toolGenerate Random Passwords
Use toolLorem Ipsum Generator
Use toolRandom Avatar
Free online random avatar generator. Create unique, customizable avatars for your applications and websites. Perfect for user interfaces, social media profiles, and application development. Easy to use with instant results.
Use toolUUID Generator
Generate UUIDs (v4) online. Copy one or many. Free, no signup, runs in your browser.
Use toolUUID Generator v1
Generate time-based UUID version 1 identifiers. Create unique identifiers that incorporate timestamps and hardware information for distributed systems.
Use toolUUID Generator v3
Generate namespace-based UUID version 3 identifiers. Create deterministic unique identifiers by hashing namespaces and names using MD5 for consistent results.
Use toolUUID Generator v4
Generate random UUID version 4 identifiers. Create unique identifiers using cryptographically strong random numbers for maximum uniqueness and security.
Use toolUUID Generator v5
Generate namespace-based UUID version 5 identifiers. Create deterministic unique identifiers by hashing namespaces and names using SHA-1 for consistent and secure results.
Use tool
Converters
Transform data between formats and units
ASCII binary to text
Convert ASCII binary code back to readable text format.
Use toolConvert Hex Color to RGB
Use toolConvert RGB Color to Hex
Use toolHTML to Text
Use toolJSON to TOML
Use toolJSON to YAML
Convert JSON to YAML format. Transform JSON data structures into human-readable YAML format while preserving data integrity.
Use toolText to ASCII binary
Free online text to ASCII binary converter. Transform any text into its 8-bit binary representation. Perfect for learning ASCII encoding, binary representation, and digital data formats. Easy to use with instant results.
Use toolUnit Converter
Use toolXML to JSON
Convert XML to JSON format. Transform XML data structures into JSON format while preserving data hierarchy and attributes.
Use toolYAML to JSON
Convert YAML to JSON format. Transform YAML data structures into JSON format while preserving data hierarchy and types.
Use tool
Date and Time Tools
Date arithmetic, time zones, calendars
Add/Subtract Days
Use toolCalendar
Free online calendar with month and year views. Plan events, check holidays, and manage schedules with an intuitive interface. Perfect for personal and professional time management.
Use toolCount days
Free count days tool: Calculate days between dates, track events, and plan ahead with ease. Customizable, user-friendly, and no registration required.
Use toolDate Difference Calculator
Use toolOnline stopwatch
Free online stopwatch with lap times, alarms, and split intervals. Easy-to-use, accurate timing tool for sports, study, and work. No download needed.
Use toolOnline Timer
Free online stopwatch with lap times, alarms, and split intervals. Easy-to-use, accurate timing tool for sports, study, and work. No download needed.
Use toolWorld Clock
Use tool
Online calculators
Math, financial, and unit calculations
Age calculator
Calculate your exact age or time between dates.
Use toolAverage Calculator
Calculate the average, median, sum, and other statistical measures of your numerical data with our free online Average Calculator tool.
Use toolHours Calculator
Calculate work hours effortlessly with our Hours Calculator!
Use toolPercentage Calculator
Use tool
Hash Tools
Cryptographic hashes and verification
AES Decrypt
Decrypt AES encrypted text. Recover your original data from text encrypted using the Advanced Encryption Standard (AES).
Use toolAES Encrypt
Encrypt text using AES encryption. Secure your data with industry-standard Advanced Encryption Standard (AES) with support for multiple key sizes.
Use toolCalculate CRC-16
Calculate CRC-16 checksums online with our free tool. Verify data integrity and detect errors in your digital transmissions and storage systems.
Use toolCalculate CRC-32
Calculate CRC-32 checksums online with our free tool. Verify data integrity and detect errors in your digital transmissions and storage systems.
Use toolCalculate MD2
Generate MD2 hash values from text or data. While not recommended for security, useful for legacy systems and non-critical checksums.
Use toolCalculate MD4
Generate MD4 hash values from text or data. While vulnerable to attacks, useful for legacy systems and non-critical checksums.
Use toolCalculate MD5
Generate MD5 hash from text or data.
Use toolCalculate MD6
Generate MD6 hash values from text or data. Supports multiple hash lengths and offers enhanced security features compared to earlier MD variants.
Use toolCalculate SHA1
Generate SHA-1 hash values from text or data. While vulnerable to collision attacks, useful for legacy systems and non-critical checksums.
Use toolCalculate SHA3-256
Use toolCalculate SHA3-512
Use toolDES Decrypt
Decrypt DES encrypted text. Recover your original data from text encrypted using the Data Encryption Standard (DES).
Use toolDES Encrypt
Encrypt text using DES encryption. Secure your data using the Data Encryption Standard (DES) algorithm.
Use toolPassword Hasher
Use toolRabbit Decrypt
Free online Rabbit decryption tool. Decrypt data encrypted with the Rabbit stream cipher algorithm. Perfect for recovering your original data with secure cryptographic protection. Easy to use with instant results.
Use toolRabbit Encrypt
Free online Rabbit encryption tool. Secure your data using the high-speed Rabbit stream cipher algorithm. Perfect for encrypting sensitive information with strong cryptographic protection. Easy to use with instant results.
Use toolRC4 Decrypt
Free online RC4 decryption tool. Decrypt data encrypted with the RC4 stream cipher algorithm. Perfect for recovering your original data with fast and efficient cryptographic protection. Easy to use with instant results.
Use toolRC4 Encrypt
Free online RC4 encryption tool. Secure your data using the RC4 stream cipher algorithm. Perfect for encrypting sensitive information with fast and efficient cryptographic protection. Easy to use with instant results.
Use toolTriple DES Decrypt
Decrypt Triple DES encrypted text. Recover your original data from text encrypted using the Triple DES algorithm.
Use toolTriple DES Encrypt
Encrypt text using Triple DES. Secure your data with enhanced encryption using three iterations of the DES algorithm.
Use tool
String Utilities
Text manipulation and analysis
SCREAMING_SNAKE Converter
Convert any text to SCREAMING_SNAKE_CASE. The convention for environment variables and constants.
Use toolChange to camel case
Free online camelCase converter. Transform any text to camelCase format for programming, variable naming, and consistent text styling. Easy to use with instant results.
Use toolChange to constant case
Free online CONSTANT_CASE converter. Transform any text to CONSTANT_CASE format for programming, constant naming, and consistent text styling. Easy to use with instant results.
Use toolChange to dot case
Use toolChange to header case
Use toolChange to no case
Use toolChange to path case
Use toolChange to sentence case
Use toolCount Text
Use toolText Palindrome Generator
Use toolDate Extractor
Use toolEmail Extractor
Use toolPrice Extractor
Use toolTime Extractor
Use toolLowercase Text
Convert text to lowercase format. Transform any text to all small letters while preserving special characters and numbers.
Use toolPascal Case to Snake Case
Free online PascalCase to snake_case converter. Transform PascalCase text into snake_case format for programming, variable naming, and consistent text styling. Easy to use with instant results.
Use toolRemove extra spaces
Remove duplicate spaces from text. Clean up and normalize text by replacing multiple spaces with a single space.
Use toolRepeat Text
Free online text repeater tool. Multiply your text by repeating it any number of times with customizable separators. Perfect for creating patterns, testing, and generating sample content. Easy to use with instant results.
Use toolReverse Text
Reverse text characters. Flip your text backwards, character by character, for mirror effects or text processing.
Use toolSnake to Pascal Case
Free online snake_case to PascalCase converter. Transform snake_case text into PascalCase format for programming, class naming, and consistent text styling. Easy to use with instant results.
Use toolText Compressor
Use toolText Deduplicator
Use toolTitlecase Text
Convert text to title case. Capitalize the first letter of each word while maintaining proper title case formatting rules.
Use toolTrim Text
Remove whitespace from text. Clean up text by eliminating unnecessary spaces, tabs, and line breaks at the beginning and end.
Use toolTruncate Text
Free online text truncation tool. Cut text to any length with customizable options for ellipsis and word boundaries. Perfect for creating previews, summaries, and fitting text into fixed spaces. Easy to use with instant results.
Use toolUppercase Text
Convert text to uppercase format. Transform any text to all capital letters while preserving special characters and numbers.
Use tool
IP Tools
IP lookup and network info
Network Tools
HTTP, headers, geolocation
SEO Tools
Meta tags, sitemaps, redirects
Canonical URL Checker
Verify canonical URLs on your website to ensure proper SEO implementation.
Use toolDeprecated HTML Tags Checker
Use toolFavicon Check
Use toolHeading Tags Checker
Use toolHTTP Status Code Checker
Use toolImage Alt Checker
Use toolRedirect Checker
Use toolRobots.txt Checker
Use toolSEO Content Length Checker
Use toolSitemap Checker
Use toolMeta Description Checker
Use toolMeta Keywords Checker
Use toolMeta Title Checker
Use toolOpen Graph Checker
Use toolWhois
Look up domain registration details and ownership information with WHOIS search.
Use tool
Web Development Tools
URL parser, CSS minifier, and more
AI tools
AI image and summarization
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Built by developers, for developers. Clean interfaces optimized for productivity and efficiency.
Always Available
No signup, no login, no waiting. All 116+ tools are free and available 24/7.
Community Driven
Continuously improving based on feedback. Request new tools and features anytime.
Frequently Asked Questions
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