Base64 Encode & Decode
Encode text to Base64 or decode Base64 back to plain text.
Base64 Encode and Decode Online
Encode text to Base64 or decode Base64 strings back to plain text with our free online tool. Base64 encoding is commonly used in web development for data URIs, email attachments (MIME), API authentication tokens, and embedding binary data in text-based formats like JSON and XML.
Developers frequently need to encode or decode Base64 strings when working with APIs, debugging authentication headers, or embedding data in web pages. Our tool handles both directions instantly with support for UTF-8 text and binary data.
Common Use Cases
Decode JWT tokens to inspect their payload, encode API credentials for Basic Authentication headers, convert binary data for embedding in JSON, or decode email attachments. The tool handles large strings efficiently and shows results in real time as you type.