Base64 Encoder/Decoder
Encode text to Base64 or decode Base64 strings back to plain text. All processing happens in your browser - completely secure and private.
Encode to Base64
Decode from Base64
🔒 Privacy & Security
All encoding and decoding happens entirely in your browser using JavaScript. Your data is never sent to any server, ensuring complete privacy and security.
Frequently Asked Questions
What is Base64 encoding?
Base64 is a binary-to-text encoding scheme that converts binary data into ASCII text format. It's commonly used for encoding data in emails, URLs, and web applications where binary data needs to be transmitted as text.
When should I use Base64 encoding?
Base64 is useful for embedding images in HTML/CSS, encoding credentials in HTTP headers, storing binary data in JSON, sending email attachments, and URL encoding. However, it's not encryption - don't use it to protect sensitive data.
Is Base64 encoding the same as encryption?
No! Base64 is encoding, not encryption. Anyone can decode Base64 without a key. It makes data unreadable to humans but doesn't provide security. Use proper encryption for sensitive data.
Why does Base64 increase data size?
Base64 encoding increases the data size by approximately 33%. This is because it represents 3 bytes of binary data using 4 ASCII characters. The trade-off is better compatibility with text-based systems.
Can I encode special characters and Unicode?
Yes! Our tool properly handles Unicode characters including emojis, accented letters, and special symbols from all languages. The encoding uses UTF-8 to ensure accurate representation.
What if I get an "Invalid Base64" error?
This error occurs when the input contains characters that aren't valid in Base64 format. Base64 only uses A-Z, a-z, 0-9, +, /, and = characters. Make sure you've copied the complete encoded string.