Base64 Encoder / Decoder

What is Base64?

Base64 is an encoding scheme used to represent binary data in an ASCII string format. It is commonly used to embed image data within HTML/CSS, or to safely transmit data across protocols that are designed for text, such as Email (MIME) or basic HTTP headers.

How to Use

1. To Encode: Select "Encode" mode, paste ordinary text into the Input area, and the Base64 representation will be generated instantly.
2. To Decode: Select "Decode" mode, paste your Base64 string (e.g., SGVsbG8=), and the original text will appear below.

Terminology

• Encode: Converting normal readable text or binary data into the Base64 sequence.
• Decode: Reverting a Base64 sequence back into normal text or binary data.

Common Use Cases

• Generating Basic Auth headers for API integrations.
• Embedding small SVGs or placeholder images directly into your CSS or JS bundles.
• Safely storing encrypted payload strings in databases.

Security

This tool uses standard web browser APIs. No data is sent to a server. Everything is processed locally on your machine, ensuring your sensitive text remains private.