Base64 Encode / Decode

Encode text or files to Base64 and decode it back, with URL-safe, MIME line-wrapped and data: URI forms. Runs in your browser.

Base64 turns any bytes into 64 safe characters (A–Z, a–z, 0–9, + and /) so binary data can travel through text-only channels: email attachments (MIME), data: URIs in HTML and CSS, JSON and XML fields, HTTP Basic authentication, Kubernetes secrets and PowerShell's -EncodedCommand. It is an encoding, not encryption: anyone can decode it. The URL-safe variant (base64url) uses - and _ instead of + and / and is what JWTs use.