Base64 Encode / Decode
Encode text or data to Base64 format or decode Base64 strings back to readable text.
Frequently Asked Questions
What is Base64 encoding?
Base64 is an encoding scheme that converts binary data into a text string using 64 printable ASCII characters (A–Z, a–z, 0–9, +, /). It is used to transmit binary data — like images or files — through systems that only handle text, such as email (MIME), JSON APIs, or HTML data URLs. Base64 is not encryption; it adds no security. It simply transforms data into a safe, text-compatible format. Encoded data is about 33% larger than the original binary due to the encoding overhead.
When should I use Base64 encoding?
Common uses for Base64 include: embedding images directly in HTML or CSS as data URLs (avoiding extra HTTP requests), transmitting binary data in JSON APIs, encoding authentication credentials in HTTP Basic Auth headers, storing binary blobs in text-based databases, and email attachments via MIME encoding. It is particularly useful when a protocol or system is text-only and cannot reliably handle raw binary data. Developers frequently encounter Base64 when working with JWTs (JSON Web Tokens), certificate files, and API integrations.
Is Base64 the same as encryption?
No — Base64 is encoding, not encryption. Anyone can decode a Base64 string immediately without any key or password. It provides no security whatsoever. Encryption transforms data into an unreadable format that requires a secret key to reverse. Base64's purpose is data format compatibility, not confidentiality. A common mistake is assuming Base64-encoded passwords or tokens are protected — they are not. Always use proper encryption or hashing (like bcrypt or AES-256) for sensitive data, and never rely on Base64 for security.