Encode and decode Base64 strings instantly
Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format. It's commonly used to encode data that needs to be stored and transferred over media designed to deal with textual data, ensuring that the data remains intact without modification.
Base64 is useful for: embedding images in HTML/CSS (data URLs), encoding binary data in JSON/XML, storing complex data in databases, sending email attachments, and encoding credentials in HTTP Basic Authentication. It's also used in cryptography and various data transfer protocols.
No, Base64 is not encryption. It's an encoding scheme that's easily reversible. Anyone can decode Base64 data without a key. Base64 is used for data representation, not for securing sensitive information. For security, use proper encryption algorithms like AES.
Base64 uses 64 characters: A-Z (26 letters), a-z (26 letters), 0-9 (10 digits), plus (+) and slash (/). There's also a padding character (=) used at the end if needed. Some variations use different characters for specific applications (like URL-safe Base64 which uses - and _).
Base64 encoding increases data size by approximately 33%. This is because every 3 bytes of binary data become 4 ASCII characters. For example, 3 bytes (24 bits) become 4 characters (each character represents 6 bits, so 4 × 6 = 24 bits).
Yes, our tool handles all types of text including special characters, Unicode, and emojis. The encoding process properly converts UTF-8 text to Base64, and decoding correctly converts back to the original text with all characters preserved.
No! All processing happens locally in your browser. We don't store, save, or transmit your data to any servers. Your content remains completely private and secure.
Yes, 100% free! No registration required, no hidden fees, and no limitations on usage. You can use it as much as you need for any type of Base64 encoding or decoding.