Base64 Decoder
What is Base64 Decoding?
Base64 decoding is the process of converting Base64-encoded text back to its original form. Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format using 64 different characters (A-Z, a-z, 0-9, +, /).
Common uses for Base64 decoding
📧 Email Attachments
Decode email attachments that are transmitted as Base64-encoded strings in MIME messages.
🖼️ Data URLs
Extract image or file data from data URLs that embed Base64 content directly in HTML or CSS.
🔐 Authentication
Decode JWT tokens, API keys, or credentials that are Base64 encoded for transmission.
🌐 Web Development
Decode form data, cookies, or session data that has been Base64 encoded for safe transmission.
📄 Document Processing
Decode PDF files, Office documents, or other binary files that have been Base64 encoded for API transmission.
🔧 Debug & Analysis
Decode and inspect Base64 data during debugging or reverse engineering of web applications.
Security Note: Base64 is an encoding method, not encryption. Data encoded in Base64 can be easily decoded by anyone. Never use Base64 as a security measure for sensitive information.
Tip: If you get an error, make sure your Base64 string is properly formatted and doesn't contain invalid characters. Valid Base64 uses only A-Z, a-z, 0-9, +, / and = for padding.