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Learning path · Beginner · 3 steps

🔐 Encoding & Auth for Developers

Base64, JWTs and JSON show up in every codebase. Learn what each really is, then decode and inspect real values in your browser — nothing is uploaded.

  1. 1

    Base64 encoding

    What Base64 is, why it's not encryption, and where it's used. Encode and decode text and files.

    📖 Read: Base64 Encoding Explained · 3 min

    🔧 Practice:
    64 Base64 Encode/Decode📄 File to Base64
  2. 2

    JSON Web Tokens

    The header, payload and signature of a JWT, and how verification works. Decode a token and inspect its claims.

    📖 Read: What Is a JWT (JSON Web Token)? · 4 min

    🔧 Practice:
    🔓 JWT Decoder🔏 JWT Encoder / Generator
  3. 3

    Working with JSON

    Format, validate and compare JSON confidently. Diff two payloads to spot exactly what changed.

    📖 Read: How to Compare Two JSON Files (JSON Diff) · 4 min

    🔧 Practice:
    { } JSON Formatter & Validator± JSON Diff / Compare
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