Guides
Guides & Tutorials
Short, practical how-to articles - each paired with a free tool to get the job done.
Generate
How to Generate a QR Code
Make a scannable QR code for any link or text.
DeveloperHow to Format JSON
Beautify, validate, and minify JSON.
ImageHow to Compress an Image
Shrink photos without losing quality.
ConvertHow to Convert Units
Metric and imperial length, weight, temperature.
DeveloperWhat Is a UUID?
Unique IDs explained, and how to make one.
SecurityHow to Create a Strong Password
What makes a password strong, common mistakes, and how to generate one.
HealthHow to Calculate Your BMI
The BMI formula, what the categories mean, and its limits.
DeveloperWhat Is Base64 Encoding?
What Base64 is, how it works, and when to use it (and not).