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DEVELOPER GUIDE
How to format JSON (and fix common errors)
Make JSON readable, validate its syntax, and understand what a formatter can and cannot fix.
5 min read
01
DEVELOPER GUIDE
Base64 encoding, without the mystery
Learn how bytes become printable text, why padding appears, and how to encode Unicode correctly.
4 min read
%
DEVELOPER GUIDE
How to encode URL parameters correctly
Understand when to encode one query value and when to preserve an entire URL.
4 min read
v4
DEVELOPER GUIDE
What is a UUID v4?
A practical guide to random identifiers, their format, and when to use them.
4 min read
.*
DEVELOPER GUIDE
How to test regular expressions safely
Use flags, inspect captures, and spot costly patterns with a JavaScript regex tester.
5 min read
jwt
DEVELOPER GUIDE
What’s actually inside your JWT?
Inspect token headers, payloads, and time claims without confusing decoding with verification.
6 min read
{ }
DEVELOPER GUIDE
Common JSON syntax errors and how to fix them
Troubleshoot trailing commas, quotation marks, escapes, and missing delimiters.
4 min read
time
DEVELOPER GUIDE
Unix timestamps: seconds vs. milliseconds
Avoid dates in 1970 and far-future years by choosing the correct timestamp unit.
4 min read