Practical guides for developers: JSON formatting, Base64 encoding, color picking, and more. Free tools + expert tutorials.
Minified JSON is unreadable. Learn how to format, validate, and beautify JSON instantly with our free online tool — plus common JSON errors and how to fix them.
What is Base64 encoding, when should you use it, and how to encode/decode strings instantly. Includes real-world examples for data URIs, API auth, and more.
1 in 12 men and 1 in 200 women are colorblind. Learn WCAG contrast ratios, how to pick accessible color combinations, and test them with our free color picker.
Compare online JSON formatters with Prettier and other CLI tools. Learn when to use each, key features, and the best free tool for quick fixes vs large projects.
Trailing commas, unquoted keys, missing brackets — 90% of JSON errors are the same 5 mistakes. Learn to spot and fix them in seconds with our validator.