Base64 Encode/Decode - Free Online | ToolXHub
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About this tool
Base64 Encode/Decode is a free online converter. Base64 encode and decode tool. Convert files and values in just a few seconds. It runs entirely in your browser — no download or sign-up needed.
Enter text or upload a file, and the tool encodes it as a Base 64 string. You can also paste a Base 64 string and decode it into the original content. Support UTF-8 encoding, processing Chinese will not be garbled. After the file is uploaded, the data URL (data: Image/png;base64,..) Will be generated, and you can embed IMG tags or CSS directly in HTML.
Base 64 encoding converts every 3 bytes of data into 4 ASC characters, using a total of 64 characters A-Z, a-z, 0-9,+ and/. The volume will increase by approximately 33% after encoding. The browser uses the btoa/atob function or the FileReader API to implement the conversion.
It is suitable for embedding small images in CSS or HTML to reduce HTTP requests, or transmitting binary data in Python. It is also used to decode message attachments or data uri.
The Base 64 encoding and decoding tool supports Base 64 conversion of text, documents and pictures, and can generate data URLs and embed them into web pages.