VioTools is a suite of 8 free, browser-based utility tools built to help students, engineers, developers, and everyday users tackle common tasks with speed and accuracy. There is nothing to download and no sign-up required — every tool runs entirely in your browser, keeping your data private and your workflow seamless across desktop and mobile devices.
Tools Included
- QR Code Generator: Instantly create QR codes for URLs, plain text, email addresses, phone numbers, and Wi-Fi credentials — ready to scan and share
- Color Picker: Pick, identify, and convert colors between HEX, RGB, HSL, and other formats for design and development workflows
- Unit Converter: Convert between 100+ units across 11 categories — length, mass, temperature, volume, speed, energy, pressure, area, power, angle, and time
- Password Generator: Generate strong, randomized, and secure passwords instantly to protect your online accounts
- Calculator: Perform everyday arithmetic and advanced scientific calculations including trigonometry, logarithms, exponents, and factorials — with history tracking
- Equation Solver: Solve linear, quadratic, polynomial, exponential, and logarithmic equations, plus compute derivatives, definite integrals, summations, and algebraic expansions
- Graphing Calculator: Plot and visualize mathematical functions with interactive zoom, real-time coordinate tracking, multi-graph support, and image export
- Time, Date & Age Calculator: Calculate time differences, date durations, exact age, and future dates — ideal for project planning, event countdowns, and work-hour tracking
Textify
Image to Text Converter
Convert images to editable text effortlessly with our powerful OCR app! Capture text from any image with your camera or gallery. Perfect for documents, books, receipts, notes, signs, and more. No more manual typing – just scan and get accurate text in seconds!
Key Features
- Fast OCR extraction: Advanced optical character recognition technology extracts text quickly and accurately from photos
- Camera or Gallery: Take a new photo with your camera or select existing photos from your gallery
- Easy editing and use: View extracted text, copy it to the clipboard, or share it instantly
- Save as PDF: Export the extracted text as a professional PDF file for easy saving and sharing
- Scan history: Access a dedicated history section to browse past scans, images, and extracted texts at any time
Big Int Calculator
+ Unit Converter
Whether you're calculating factorials, powers, or complex expressions with massive digits, the Big Integer Calculator delivers fast and reliable results with a clean and intuitive design. Big Int Calculator is a powerful and user-friendly app designed for precise calculations with very large numbers that standard calculators can't handle.Supports numbers up to 24 digits in portrait mode and up to 40 digits in landscape mode for maximum visibility and comfort. Basic mode for everyday arithmetic and scientific mode for advanced functions like exponents, roots, trigonometry, and more. Displays expressions and results across up to 3 lines, making it easy to work with long calculations and big integers without scrolling or truncation. Calculation history stores up to 50 previous results, allowing you to review, reuse, or copy past computations effortlessly.
A beautifully designed unit converter that makes everyday calculations quick and effortless. Convert values across 12 essential unit categories – all in one simple app.
Key Features
- Big Integer Calculations: Handle factorials, powers, and complex expressions with unlimited digits
- 12 Unit Categories: Convert between length, mass, time, temperature, area, volume, speed, energy, power, pressure, light, and angle
- Clean Design: Intuitive interface that makes complex calculations simple
- Fast & Reliable: Quick results with accurate precision
- All-in-One: Calculator and converter in a single powerful app