Base64 Encoding Guide: What It Is and What It Is Not

Base64 is an encoding format, not encryption. Use this page to avoid common security and data-transfer mistakes when handling tokens, binary payloads, and transport constraints.

When Base64 is useful

Embedding binary data in text channels (JSON, XML, email bodies).
Creating Data URLs for quick previews.
Moving opaque blobs across systems that expect plain text.

When Base64 is not enough

Base64 does not protect secrets. Anyone can decode it instantly. If you need confidentiality or integrity, use proper encryption and signing mechanisms, not simple encoding.

Debugging workflow

Use Base64 Encode & Decode for text payloads and Image to Base64 for local image conversion. Keep line endings and UTF-8 handling consistent when comparing decoded output.

Practical checks

Document whether a field expects raw text, Base64 text, or a Data URL prefix.
Reject malformed input early and log decode errors clearly.
Strip test payloads from logs before sharing incident reports.