Base64 Decoder

Decode text or data from Base64 format, ensuring safe transmission of Unicode and ASCII content.

Your original input

Understanding Base64 Encoding

Base64 encoding converts binary data into a text-based format using a 64-character alphabet (A-Z, a-z, 0-9, +, /). It’s widely used in web development to embed images, transfer files in APIs, or encode email attachments.

Key Use Cases

Embedding images in HTML/CSS (e.g., data:image/png;base64,...)
Encoding files in JSON for API payloads
Storing small binary data in databases as text

Example in JavaScript

$ const text: string = "Hello, World!";

$ const encoded: string = btoa(text); // "SGVsbG8sIFdvcmxkIQ=="

$ const decoded: string = atob(encoded); // "Hello, World!"`

Pros and Cons

Pros: Text-based, portable, no separate HTTP requests for small assets.
Cons: ~33% size increase, not encryption, processing overhead for large data.

Security Note: Base64 is encoding, not encryption. Avoid using it for sensitive data without proper encryption.