Base64 Encoder

About Base64 Encoder

Base64 Encoder / Decoder converts any text or binary data into a Base64 string and back again. Base64 is widely used when you need to embed images in CSS or HTML, transmit binary data over text-only channels, or store small pieces of data inside JSON or cookies. Developers encounter Base64 when working with data URIs, email attachments, API payloads and authentication tokens. This tool lets you quickly encode a string or decode an existing Base64 value without writing code or opening a terminal. All conversion is performed in the browser with the built-in btoa/atob functions (and TextEncoder for Unicode safety), guaranteeing that your data never leaves the page.

Key features

• Encode plain text to Base64
• Decode Base64 back to text
• Handles UTF-8 content
• Clear and Copy buttons
• No server involvement
• Useful for developers and security testing