Base64 encoding and decoding explained
Base64 represents binary data using a limited set of printable characters. It is useful for transport and embedding, not secrecy.
Why developers use Base64
You will see it in data URIs, API payloads, email formats, certificates, and encoded binary values. Text should be converted to bytes using a character encoding such as UTF-8 before Base64 encoding.
Base64 is not encryption
Base64 can be decoded by anyone who has the value. Do not use it to hide passwords, API keys, personal data, or other secrets.
Why decoded output can look broken
Not every Base64 value represents readable text. It may represent an image, archive, compressed data, or another binary format. Interpreting arbitrary binary bytes as UTF-8 can produce unreadable output.