Guides
Short, practical explanations to go with the tools. The newest guides come first.
How to Remove Pages from a PDF Without Uploading ItDelete blank, duplicate or unwanted pages from a PDF in four steps, in your browser. With page-range examples and what to do when the file has a password.How to Make a Favicon for Your WebsiteWhat a favicon is, which sizes and files you need today, how to make them from your logo, and how to add them to your site.HEX, RGB and HSL Colour Codes ExplainedWhat colour codes such as #ff8800, rgb(255, 136, 0) and hsl(32, 100%, 50%) mean, how to read them, and which one to use for web design and print.What Is Base64 and When Should You Use It?Base64 explained in plain language: what it does, why it makes data a third larger, where it is used, and why it is not encryption.How to Calculate a PercentageThe three percentage sums you need in daily life, with formulas and worked examples: percent of a number, one number as a percent of another, and change.How to Turn Photos into a PDFCombine phone photos or scans into one PDF for a form, an application or your records. Steps, page size advice and tips for a small, readable file.How to Create a QR Code for Your Wi-FiMake a QR code that lets guests join your Wi-Fi by pointing their phone camera at it. Steps, printing tips, and what to know about safety.What Makes a Strong Password?Why length beats complexity, what password strength in bits means, and the three habits that protect your accounts better than any clever trick.How to Compress an Image for a WebsiteThree steps to make images load fast on a website: resize to the size you need, choose the right format, and compress. With practical quality settings.How to Merge PDF Files Without Uploading ThemCombine several PDFs into one document in a few steps, in your browser, without sending your files to a server. With tips for order and large files.JPG vs PNG vs WebP: Which Image Format Should You Use?A plain comparison of JPG, PNG and WebP. What each format is good at, where it falls short, and which one to pick for photos, logos, screenshots and websites.