Base64 Encoder Online
Online Base64 encoder: paste text and turn it into a Base64 string in one click. UTF-8 aware, runs locally, nothing is uploaded.
Encoding converts raw text or bytes into a Base64 string. For non-ASCII characters such as Chinese, this tool first converts them to UTF-8 bytes and then encodes, so the result is consistent across every environment.
Common scenarios: putting a small piece of config or a token into a text-only field, carrying a binary fragment inside an API payload, or turning an image into a string that can be inlined directly in CSS or JSON.
Everything happens locally in your browser — the content is never sent to a server.