Base64 Encoder / Decoder

Base64 is the workhorse encoding for embedding binary data in text-based protocols: inline images in HTML emails, authentication tokens, data URIs in CSS, and payloads in JSON that must survive transport over systems that only handle printable ASCII. Instead of a raw stream of bytes, you get a compact string of letters, digits and symbols that any text channel — headers, query strings, chat messages — can carry safely.

An encoder/decoder lets you go both ways. Encode plain text, or a binary file, into a Base64 string with a single action, or decode an encoded string back into the original text so you can inspect what a token or inline asset actually contains. Decoding is also the first step when debugging cached or embedded content that is not rendering.

Both directions run entirely in your browser. That matters because tokens and encoded payloads frequently contain sensitive information — credentials embedded in configs, signed JWTs, private data URIs. Encoding or decoding them locally means the strings never travel to a third-party server, which is exactly the behaviour you want when you are inspecting unfamiliar input.