A comprehensive platform that provides various practical online tools and applications to make your work and life more convenient and efficient.
4oftools offers 17+ free online tools covering multiple categories:
- JSON Formatter - Format, validate, and beautify JSON data with support for compressed and expanded modes
- Base64 Encoder/Decoder - Encode and decode Base64 strings for text, images, and various formats
- Timestamp Converter - Convert between Unix timestamps and human-readable date/time formats
- MD5 Hash Generator - Generate MD5 hash values for text input
- URL Encoder/Decoder - Encode and decode URL strings with percent encoding
- JWT Parser - Parse and view JWT (JSON Web Token) structure including Header, Payload, and Signature
- WebSphere Password Encrypt/Decrypt - Encrypt and decrypt passwords for WebSphere Application Server
- Number Base Converter - Convert between binary, octal, decimal, and hexadecimal number systems
- Hash Converter - Generate hashes using multiple algorithms (MD5, SHA1, SHA256, SHA512, SHA3, RIPEMD160)
- Crypto Encryptor/Decryptor - Encrypt and decrypt data using various algorithms (AES, DES, RC4, Rabbit, TripleDes)
- Regex Tester - Test and validate regular expressions with multiple flags
- XML Formatter - Format, validate, and compress XML data
- Crontab Calculator - Parse cron expressions and calculate next execution times
- YAML/JSON Converter - Convert between YAML and JSON formats
- QR Code Generator - Generate QR codes with customizable colors, sizes, and error correction levels
- Color Picker - Professional color picker supporting RGB, HEX, HSL format conversions
- Mortgage Calculator - Calculate mortgage payments with detailed payment plans (equal payment and equal principal methods)
Browse and discover the latest AI applications, products, and technologies:
- AI Programming Tools
- AI Foundation Models
- AI Image Technology
- AI Video Technology
- Other AI Applications
Explore feature-rich applications organized by categories:
- Efficiency Tools
- Life Tools
- Design Tools
- Programmer Tools
- Other Applications
- English (Default)
- 中文 (Chinese)
- Seamless language switching
- SEO optimized for both languages
- Free to Use - All tools are completely free, no registration required
- No Installation - All tools run directly in your browser
- Privacy First - All processing is done locally in your browser, no data is sent to servers
- Responsive Design - Works perfectly on desktop, tablet, and mobile devices
- Fast & Reliable - Optimized for performance and reliability
- SEO Optimized - Fully optimized for search engines in both English and Chinese
- Browse Tools - Visit the Tools page to see all available tools
- Search & Filter - Use the search bar or category filters to find specific tools
- Use Tools - Click on any tool to start using it immediately
- Switch Language - Use the language switcher in the header to change between English and Chinese
- Programmer Tools - Development and coding utilities
- Efficiency Tools - Tools to improve productivity
- Life Tools - Daily life utilities
- Design Tools - Design and creative utilities
- Other Tools - Miscellaneous utilities
- All data processing happens locally in your browser
- No data is transmitted to our servers
- No cookies or tracking for tool usage
- Your privacy is our priority
If you have any questions, suggestions, or feedback, please feel free to contact us or visit our Sponsor page to support the platform.
We welcome contributions! If you'd like to add new tools or improve existing ones, please check out our repository.
4oftools - Making your work and life more convenient and efficient.