Encoding Guides

Guides for Base64 and base64url, URL and HTML contexts, Unicode representations, text notation, and JWT trust boundaries.

Guides In This Topic

Identify the byte, character, parser, or security boundary before encoding or decoding a value.

Base64 Encoding Explained: Bytes, UTF-8, Padding, And Base64URL

The byte-boundary and alphabet owner for both Base64 tools.

URL Encoding vs HTML Character References

The context-selection owner for URL and HTML encoding tools.

Web And Text Encoding Guide: Choose By Data Boundary

The category-level chooser for transformations that should not be called one generic encoding task.

Unicode Code Points, UTF-8, UTF-16, And Escape Notation

A distinct conceptual owner for Unicode representation boundaries.

JWT Decode vs Verify: Why Readable Claims Are Still Untrusted

A distinct security-debugging owner for decode-only JWT inspection.

Popular Encoding Tools Tools

When you already know the exact task, move from these support pages into the direct conversion or formatting tools.

Base64 Encode previewEncoding

Base64 Encode

Encode UTF-8 bytes as standard Base64 or unpadded base64url.

 Base64 Decode previewEncoding

Base64 Decode

Decode a declared Base64 alphabet into strict UTF-8 text or hexadecimal bytes.

 URL Encode previewEncoding

URL Encode

Encode one URI-component or form value with explicit space and plus rules.

 URL Decode previewEncoding

URL Decode

Decode one percent-encoding layer under component or form semantics.

 HTML Entity Encode previewEncoding

HTML Entity Encode

Encode five HTML-sensitive characters under a deterministic one-pass profile.

 JWT Decode previewEncoding

JWT Decode

Inspect JWS parts or identify JWE while keeping every decoded claim unverified.

Browse all Encoding Tools