Base64 Encoder & Decoder Online (Text & File)

Base64 encodes 8-bit binary data—such as images, videos, and executable files—as an ASCII text string. It prevents binary data from being corrupted when included in email, HTML, CSS, or JSON.

• Embed data: lets you embed small images or font files directly in HTML or CSS, reducing the number of HTTP requests.
• Safe transport: Safely carry binary data through text-based protocols such as JSON and XML.
• Represent binary data as text: Makes complex binary data easy to copy, paste, store, and manage as plain text.

Uploaded files never leave your device. All processing uses your local computer.

A Data URI embeds data directly in a URL instead of referencing an external file. Add the following prefix before Base64-encoded file data: data:[MIME type];base64, before the encoded file data.

For example, you can embed a small PNG image directly in HTML like this:

<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUg...">

Enable 'Include Data URI scheme' to add this prefix automatically when encoding a file.

Encoding is converting the original text or file into a Base64 string, and decoding is converting the Base64 string back into readable text or original file data.

No. Base64 is not a compression method but a text encoding method for transmission, so the data size generally increases compared to the original binary. If your goal is to reduce size, use compression or format optimization tools.

People sometimes call Base64 decoding "decryption," but technically it is decoding. Base64 is not encryption; it is an encoding that represents data as text, so anyone can reverse it. Do not use Base64 to protect passwords or secrets.