Guides & Tutorials
Practical, no-fluff guides that teach you how to get the most out of free online tools — from PDFs and images to QR codes and calculators.
How Compound Interest Works: Formula & Examples
Compound interest explained simply: the formula, worked examples, compounding frequency, and why monthly contributions matter most. Free calculator included.
6 min read → CalculatorsHow to Calculate Age Accurately in Years, Months, and Days
Learn how to calculate age accurately in years, months, and days — the manual formula, leap-year rules, and mistakes to avoid. Free tool included.
5 min read → CalculatorsHow to Calculate Take-Home Pay (Hourly to Salary)
Learn how to calculate take-home pay from any hourly wage or salary: the formulas, tax buckets, deductions, and pay frequencies. Free US paycheck calculator.
6 min read → PDFHow to Compress a PDF Without Losing Quality
Learn how to compress a PDF without losing quality: the right compression level, DPI settings, and 5 mistakes to avoid. Free step-by-step guide.
6 min read → PDFHow to Convert JPG to PDF (Free, Online)
Learn how to convert JPG to PDF online for free — single or multiple images, page size, margins, orientation, and quality tips. Works for any image to PDF conversion. No signup needed.
7 min read → ImagesHow to Convert JPG to WebP (Smaller, Same Quality)
Convert JPG to WebP for 25–35% smaller images with the same quality. Step-by-step guide, quality settings, and a free browser-based converter.
5 min read → QR CodesHow to Create a QR Code for Your WiFi Network
Create a WiFi QR code in under a minute and let guests join your network without typing a password. Full step-by-step guide for home, cafes, and offices.
6 min read → PDFHow to Merge PDF Files Online (Free)
Learn how to merge PDF files online for free. Step-by-step instructions, page-ordering tips, and fixing mismatched sizes. No signup needed.
5 min read → AI ToolsHow to Remove Image Backgrounds Free (and Get Clean Edges)
Remove image backgrounds free in seconds with AI — plus pro tips for clean edges, transparent PNGs, and passport photos. No software to install.
6 min read → ImagesHow to Resize Images Online Without Losing Quality
Learn how to resize images online in seconds: exact dimensions for social media, DPI myths, and the settings that keep your photos sharp. Free, no signup.
5 min read → QR CodesHow to Scan a QR Code on Any Device
Learn how to scan a QR code on iPhone, Android, and PC with exact steps, fixes for codes that won't scan, and how to avoid QR phishing scams.
7 min read → ImagesJPG vs PNG vs WebP: Which Image Format Should You Use?
JPG, PNG, or WebP? Learn exactly when to use each format, with real file-size comparisons and tips to shrink images without losing quality.
6 min read →