Comparison
encode raw text to base64 for transport, or decode base64 back to the original text.
Base64 Encoder and Base64 Decoder are strict inverses. Encoding turns arbitrary bytes into ASCII-safe text that survives email, URLs, and JSON. Decoding turns that ASCII text back into the original bytes.
You'll see base64 in JWT tokens, data URIs, email attachments, and basic auth headers. Encoder is for outbound work; Decoder for inspection.
| Feature | Base64 Decoder | Base64 Encoder |
|---|---|---|
| Direction | base64 → text | Text → base64 |
| Common inputs | JWT payloads, data URIs, auth headers | API keys, images, credentials |
| URL-safe variant? | Optional toggle | Optional toggle |
Encoder to prepare a payload for transport. Decoder to inspect what someone else sent you. Keep both bookmarked side by side.
No. It's an encoding, not encryption. Anyone can decode it. Use it for transport safety, never for secrecy.