Base64 Encoder/Decoder is a free online tool that converts text to and from Base64 encoding. Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format, commonly used to embed data in URLs, emails, HTML, and API payloads where binary data cannot be transmitted directly.
The tool supports both standard Base64 encoding (RFC 4648) and URL-safe Base64 encoding, which replaces the + and / characters with - and _ to make the output safe for use in URLs and filenames. You can encode plain text to Base64 or decode Base64 strings back to readable text with a single click.
Whether you are a developer working with APIs that require Base64-encoded data, debugging encoded strings, or encoding configuration values, this tool provides instant conversion with clear input and output. All processing happens in your browser, keeping your data completely private.
Select whether you want to encode text to Base64 or decode a Base64 string back to plain text.
Paste or type your plain text (for encoding) or Base64 string (for decoding) into the input area.
The tool instantly converts your input and displays the result. For encoding, you get a Base64 string; for decoding, you get the original plain text.
Click the copy button to copy the encoded or decoded result to your clipboard for use in your application or project.
Convert text to Base64 and decode Base64 back to text with a single click toggle
Supports URL-safe Base64 encoding that replaces + and / with - and _ for safe use in URLs
Input is converted instantly as you type, providing immediate feedback without clicking any buttons
All encoding and decoding happens in your browser. Your data is never sent to any server
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