Formalint

Browser-based developer tools

Base64 Encoder

Encode and decode UTF-8 text as Base64 without sending input to a backend.

Open URL encoder

Input

0 bytes

Result

Ready

JWT DecoderInspect token claims URL EncoderEscape query strings Hash GeneratorSHA digests for text

Reference notes

Base64 for payloads and tokens

UTF-8 aware

The encoder handles regular Unicode text by converting strings through UTF-8 bytes before Base64 output.

API friendly

Base64 appears in tokens, request payloads, basic auth headers and compact transport formats.

Not encryption

Base64 is reversible encoding. Do not treat encoded values as secret or protected data.