About ExtensionFile.net
ExtensionFile.net is a comprehensive online resource dedicated to helping users understand and work with file extensions. With over 12,000 file types documented in 8 languages, we provide detailed information about file formats, compatible applications, and practical tools for file management.
Our Mission
We believe that understanding file extensions is fundamental digital literacy. Our mission is to make file format information accessible to everyone—from casual computer users to IT professionals—helping them identify unknown files, choose the right applications, and work more efficiently with their digital content.
What We Offer
📚 Comprehensive File Extension Database
Our database includes detailed information about:
- Over 12,000 file extensions across all categories
- Compatible applications for Windows, macOS, and Linux
- Technical details including MIME types and file associations
- Common programs that open each file type
- Multilingual descriptions in 8 languages (English, German, French, Spanish, Portuguese, Italian, Russian, Japanese)
🛠️ Free Online Tools
We provide browser-based tools that work 100% client-side for your privacy and convenience:
- File Analyzer: Identify file types, calculate hashes, and view hex dumps
- Extension Search: Quickly find information about any file extension
- Text Case Converter: Convert between different text cases and formats
- Base64 Encoder/Decoder: Encode and decode Base64 strings and files
- JSON Formatter: Validate, format, and minify JSON data
- Hex Viewer: Examine binary file structures
- File Hash Calculator: Generate MD5, SHA-1, SHA-256, and SHA-512 hashes
📖 Educational Resources
We publish comprehensive guides and articles covering:
- How to open files on different operating systems
- File format security and best practices
- File compression, conversion, and encryption techniques
- Technical information about file systems and MIME types
- Common file format comparisons and use cases
About DivMulTech LLC
ExtensionFile.net is operated and maintained by DivMulTech LLC, a technology company specializing in web-based information resources and software tools.
Company Information
- Company Name: DivMulTech LLC
- Website: divmultech.com
- Focus: Information technology, web resources, and educational tools
Our Commitment
DivMulTech LLC is committed to:
- Quality: Maintaining accurate, up-to-date file extension information
- Privacy: All tools run in your browser—no file uploads to our servers
- Accessibility: Free access to all information and tools, no registration required
- Performance: Fast loading times and responsive design across all devices
- Continuous Improvement: Regular updates to our database and new features
Privacy & Security
Your privacy is important to us:
- All file analysis tools run entirely in your browser using JavaScript
- Files you upload for analysis never leave your computer
- We don't collect personal information without consent
- No cookies required for basic functionality
- See our Privacy Policy for complete details
Contact Us
We welcome your feedback, suggestions, and questions:
💬 Feedback
Found incorrect information? Want to suggest a new feature? Have a question about a file type? Please reach out—we read and respond to all messages.
🤝 Collaboration
Interested in partnering or contributing content? We're open to collaborations that benefit our users. Contact us to discuss opportunities.
🐛 Report Issues
Noticed a bug or technical problem? Let us know so we can fix it promptly.
Frequently Asked Questions
Is ExtensionFile.net free to use?
Yes! All our content, database information, and tools are completely free to use. No registration, subscriptions, or hidden fees.
Can I use your information on my website?
Please contact us to discuss licensing arrangements for commercial use. For personal, non-commercial reference with attribution, limited use is generally acceptable.
How often is your database updated?
We continuously monitor new file formats and update our database regularly. If you notice missing or outdated information, please let us know.
Do you store files I analyze with your tools?
No. All our tools run entirely in your browser using JavaScript. Your files never leave your computer.
Can you add support for [specific file extension]?
We're always expanding our database. Use the "Request Addition" feature on our search page, or email us with details about the file type you'd like documented.
Why do you offer these services for free?
We believe file format information should be freely accessible to everyone. The site is supported by minimal, non-intrusive advertising that helps cover hosting and maintenance costs.