Decode Base64 encoded strings back to plain text instantly. Fast, secure, and 100% free.
Paste your Base64 encoded string below to decode it back to plain text
Base64 decoding is the process of converting Base64 encoded strings back to their original format. Base64 encoding represents binary data in an ASCII string format by translating it into a radix-64 representation.
This decoder tool helps you reverse the encoding process, transforming Base64 strings back into readable text or binary data. It's commonly used when working with APIs, email systems, data URIs, and anywhere Base64 encoding is used to transmit data.
Decode Base64 encoded data URIs, authentication tokens, and API responses
Extract and read Base64 encoded attachments and email content
Decode Base64 strings in JSON responses and configuration files
Inspect and debug Base64 encoded data in applications
Yes, all decoding happens entirely in your browser. Your data never leaves your device and is never sent to any server, ensuring complete privacy and security.
If the input string is not valid Base64, the tool will display an error message. Make sure your input contains only valid Base64 characters (A-Z, a-z, 0-9, +, /, and =).
Yes, you can decode large strings. However, very large inputs (over 10MB) might temporarily slow down your browser during processing.
Absolutely! This Base64 decoder is completely free with no limitations, registration, or hidden costs.