Base64 Encode Online — Free Tool
Free online Base64 encoder and decoder for developers working with Basic authentication, API gateways, and configuration secrets. Encode plain text to Base64 or decode Base64 back to UTF-8 strings entirely in your browser.
- UTF-8 safe encode and decode
- Instant mode switch — encode vs decode
- Complements JWT Decoder (JWT uses Base64URL segments)
- Nothing uploaded — safe for staging credentials on your machine