Base64 Encode / Decode

Base64 is an encoding scheme that converts binary data into an ASCII string format using a set of 64 characters (A-Z, a-z, 0-9, +, /). It is commonly used in web development, APIs, and data transfer to ensure data remains intact without modification during transmission.

Base64 is not encryption — anyone can decode Base64 data back into its original form. It is simply a representation format designed for safe data transfer.

To encode text to Base64, select Encode mode, paste your text, and the encoded Base64 string will appear instantly. To decode, select Decode mode, paste your Base64 string, and you'll get the original text back.

Use the Swap button to switch between encoding and decoding modes quickly.

Developers use Base64 to encode binary data like images or files into text so they can be sent over HTTP, stored in JSON, or used in APIs. It's also used to encode user credentials in Basic Authentication headers.

Our Base64 tool helps developers quickly encode or decode data for API testing, authentication, and data manipulation.

JSON Web Tokens (JWTs) use Base64 encoding for their header and payload sections. Our tool helps you inspect JWT components by decoding the Base64 parts to see the actual JSON data.

Remember that Base64 encoding is not secure for sensitive data — it's just a representation format. JWT signatures provide the security layer, not the Base64 encoding.

Base64 encoding is also used to embed images directly into HTML or CSS using data URIs. This reduces HTTP requests and allows smaller inline images.

You can encode images or other files to Base64 and include them directly in your code or data storage.

Yes. All encoding and decoding happens locally in your browser. Your data is never sent to a server, making our Base64 tool completely private.

This is especially important when working with sensitive data like API tokens, authentication headers, or private files.