Guides
Practical how-to guides for getting the most out of Carbide's free, offline tools.
How to create a strong, secure password
Learn what makes a password truly secure, the most common mistakes people make, and how Carbide's free offline tools can help you stay protected.
Read guideHow to convert units quickly and accurately
Learn to convert length, weight, temperature, volume, speed and data between metric and imperial — fast, precise, and without rounding mistakes.
Read guideHow to create and scan QR codes safely
Learn how to generate QR codes for links, Wi-Fi, contacts and payments, then scan them safely — all free, offline and private with Carbide.
Read guideHow to merge, split and convert PDFs on your device
Learn how to combine PDFs, extract pages, convert images to PDF and export pages as images — free, offline and private with Carbide.
Read guideHow to measure things with your phone
Turn your phone into a ruler, spirit level, compass, and protractor — no extra hardware needed. Tips, tricks, and real accuracy limits.
Read guideHow to calculate and understand your BMI
Learn the BMI formula, what each category means, and why BMI has limits — then calculate yours instantly with Carbide's free, offline BMI Calculator.
Read guideHow to track live gold and silver prices by karat
Learn how gold and silver prices are quoted by karat and purity, how to calculate jewelry value, and how to compute zakat on gold — all offline with Carbide.
Read guideHow to find your IP address and network details
Learn how to find your public and local IP address, understand DNS, read a WHOIS lookup, and troubleshoot basic network issues — all from your device.
Read guideHow to extract text from an image using OCR
Learn how to extract text from any image accurately using OCR — tips on lighting, focus, contrast, and scanning multi-page documents with Carbide.
Read guideHow to pick colors and build palettes for any project
Learn how HEX, RGB, and HSL work, how to choose accessible color combinations, and how to build beautiful gradients — all on your device.
Read guidePNG vs JPG vs WebP vs AVIF: which format should you use?
Learn when to use PNG, JPG, WebP, or AVIF. Compare quality, file size, transparency, animation, and browser support — then convert instantly with Carbide.
Read guideHow to convert images between formats on your device
Learn how to convert HEIC to JPG, PNG to WebP, and more — free, offline, and private using Carbide on Android or iOS.
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