Base64 Encoder / Decoder
Convert text or strings to Base64 format and vice versa.
About this tool
Base64 is an encoding scheme that converts binary data or arbitrary text into a string of ASCII characters using a set of 64 printable characters. It's used wherever binary data needs to be transmitted through systems that only support text — email attachments, data URLs in CSS and HTML, JSON API payloads, and HTTP Basic Authentication headers.
This tool lets you encode any text to its Base64 representation or decode a Base64 string back to plaintext. Encoding is not encryption — the original content is fully recoverable from the encoded form. Base64 just ensures the data survives transmission through text-only channels without corruption.
Base64 encoding increases data size by approximately 33%, so it's a trade-off: reliability over efficiency. Understanding how to encode and decode Base64 is an essential skill for web developers and anyone working with APIs, authentication tokens, embedded data URIs, or binary data in text contexts.