In a complex world, we choose to do subtraction. Let tools return to tools, let efficiency return to efficiency. We believe that the best tools are those that you don't even notice - you just focus on your work, and we handle everything else.
Tudousi Tools
Simplify Everything
Local · Simple · Pure
Why Choose Tudousi Tools?
About Us
Tudousi Tools is a platform dedicated to providing local-first online tools. We believe that in the digital age, user privacy and data security should be the top priority.
Our team consists of developers who love technology and pursue the ultimate experience. We understand the data security risks faced when frequently using various online tools in daily work. Therefore, we created Tudousi Tools, where all functions are completed locally in the user's browser, and data never leaves the user's device.
Our mission is to enable every user to safely and conveniently use various online tools without worrying about privacy leaks. Whether you are a developer, designer, or ordinary user, you can find practical features suitable for you at Tudousi Tools.
We always adhere to the principle of "user first", continuously optimize the product experience, expand tool functions, and provide users with the best online tool services.
Statistics
50+
Integrated Tools
100%
Local Execution
50K+
Active Users
99.9%
Service Uptime
Our Story
2025
Officially Launched
Tudousi Tools was officially launched, offering 30+ tools with Chinese/English switching and dark/light themes, receiving widespread user praise.
2026
Rapid Growth
Expanded the tool library to 50+ tools, optimized user experience, and established comprehensive privacy protection mechanisms and user feedback channels.
Future
To Be Continued...
More tools are under development, stay tuned for our updates.
Mission & Vision
Our Mission: Enable every user to safely and conveniently use online tools, enjoy the convenience brought by the digital age, while protecting personal privacy and data security.
Our Vision: Become the world's most trusted online tool platform, providing comprehensive tool services for developers and ordinary users, and promoting the development of internet privacy protection.
We believe that technology should serve people, not infringe on their rights. Therefore, we take privacy protection as the core principle of product design. All tools adopt a local-first approach to ensure absolute data security for users.
In the future, we will continue to expand our tool library to cover more practical functions in various fields, while maintaining the simplicity and efficiency of our products, allowing users to quickly find and use the tools they need.
Core Values
Privacy First
User data always belongs to the user. We do not collect or upload any user information, ensuring zero privacy risk.
Extreme Efficiency
Millisecond-level response, no waiting required. Let users focus on their work, not tool operations.
Pure Experience
No ads, no pop-ups, no distractions. Providing a clean and refreshing tool experience.
Tool List
JSON Formatter
Supports JSON formatting, compression, and validation with multiple view modes for developer debugging.
National Encryption
Supports SM2, SM3, SM4 national encryption algorithms to meet domestic security encryption requirements.
Base64 Encoder
Supports Base64 encoding/decoding for text and files, with URL-safe mode support.
Image Converter
Supports format conversion between JPG, PNG, WebP, GIF, etc., with adjustable quality and size.
Timestamp Converter
Supports conversion between Unix timestamps and human-readable time, with multiple time zone support.
QR Code Generator
Supports generating QR codes for text, URL, WiFi, etc., with customizable styles and sizes.
PDF Converter
Supports PDF processing including merging, splitting, and encryption.
Number Base Converter
Supports conversion between binary, octal, decimal, and hexadecimal.
Text Tools
Includes text deduplication, character counting, case conversion, and other practical text processing functions.
Team
👨💻
Tudousi Team
Founder & Lead Developer
We are a group of developers who love technology, with years of software development experience. We are committed to building the safest and most convenient online tool platform, enabling every user to enjoy a pure tool experience.
Frequently Asked Questions
Is Tudousi Tools safe?
Yes, Tudousi Tools is very safe. All tools run locally in your browser, and data is never uploaded to any server. You can use it with confidence without worrying about privacy leaks. We use advanced technology to ensure your data is always processed locally.
Do I need to register an account to use Tudousi Tools?
No registration required. Tudousi Tools is completely free and requires no login. Open the webpage and use all features immediately. We respect your privacy and will never ask for any personal information. You can access and use our tools anytime, anywhere.
Does Tudousi Tools support offline use?
Most tools support offline use. When you first visit the website, your browser will cache necessary resources. After that, you can still use most features even without an internet connection. However, some tools that require external resources may not work offline.
How can I provide feedback or suggestions?
You can submit questions or suggestions through the feedback page on our website, or send an email directly to toolstdsay@foxmail.com. We take every piece of feedback seriously and continuously improve our products. Your opinions are very important to us.
Is Tudousi Tools free?
Yes, Tudousi Tools is completely free. We offer all tools for free use with no hidden fees or paywalls. You can use all features free of charge without any restrictions. We maintain operations through advertising and sponsorships. Thank you for your understanding and support.
Contact & Services
Feedback
Feedback
Privacy Policy
Privacy Policy
Terms of Service
Terms of Service
Cookie Policy
Cookie Policy