Base64 Encoder / Decoder

Encode/decode Base64 locally. No uploads. Everything runs in your browser.

What is Base64 encoding?

Base64 converts binary data into a string of 64 ASCII characters. Commonly used to transmit small pieces of data over channels that expect text, such as HTTP headers, JSON payloads or query strings.

Why developers use Base64

• Embedding images or files directly in HTML, CSS or JSON as data URLs
• Sending binary data (keys, hashes) over APIs that only support text
• Encoding credentials or tokens in legacy protocols
• Debugging and inspecting encoded values in logs and network traces

Base64 is not encryption

Base64 only transforms data into a different representation — it does not hide or protect it. Anyone who has the encoded string can decode it back. For sensitive data, use proper encryption (AES, RSA) instead.