Online Tools
Open the same practical utilities directly in the browser, with no installation required.
Online Special Character Picker
Try our Online Special Character Picker for instant use! No installation required. For a faster experience and direct insertion into any web page without interruption, we recommend installing our Chrome extension.
Online Ruler
Measure Real-World Dimensions on Your Screen
Use an online ruler to measure lengths on your screen in centimeters, millimeters, or inches. Calibrate it using an object of a known size to achieve accurate 1:1 measurements.
Online Protractor
Measuring Angles with a Virtual Protractor
Place the online protractor over an angle in an image, diagram, or design draft. Align the center of the protractor with the vertex of the angle, then read the measurement from the scale—no extensions or installations required.
Three-point Angle Finder
Measuring angles using two adjustable arms
Position the vertex, then drag the two arms to align them with the sides of the angle. The tool automatically calculates the angle between them, making it easier for you to measure various irregular angles in images, diagrams, and design drafts.
Math Wonder Box Online
Directly adjust key parameters of mathematical models, observe graphical variations in real-time, discover the mathematical laws behind exquisite patterns, and explore or create your own unique mathematical landscapes.
Physics Wonder Box Online
Freely adjust the key parameters of physics simulations, observe motion, collisions, vibrations, and gravitational interactions in real-time, explore fascinating variations under different conditions, and discover the physical laws behind complex phenomena.
Chrome Browser Extensions
Install focused extensions that make everyday browsing, writing, measuring, and organizing faster.
AI Chat Exporter
Export AI conversations (ChatGPT, Claude, Gemini, Google AI Overview & Google AI Mode) to Markdown or Text with one click. Supports selective export and preserves formatting.
Special Character Picker
Find and copy special characters, emojis, and symbols easily. A simple and powerful tool for your text needs.
Hilight Lens
Your visual intuition tool. Lock onto keywords instantly, making deep reading and information retrieval easier than ever.
Copy Paste Assistant
Manage common text snippets and fill forms instantly with a smart floating assistant.
Online Ruler
Accurate 1:1 screen ruler and protractor with physical calibration. v2.1.0 update adds a dynamic 3-point protractor for even more precise angle measurements.
Todo List
Simple and modern task management and reminder tool for Chrome. Stay organized and efficient every day.
Science Wonder Box
A new-tab extension themed around science that integrates fractal exploration, chaos theory, and a collection of useful links. Powered by high-performance dynamic rendering technology, it presents a miniature science museum, allowing you to appreciate the beauty of order found in the deepest reaches of the universe.
Smart Region Screenshot
Effortlessly capture, crop, reformat, and annotate any web content with crisp precision and zero hassle.