Base64 Encoder / Decoder
Encode and decode Base64 strings — instantly.
Encode to Base64
Decode from Base64
How to Use Base64 Encoder/Decoder
To encode: type or paste text in the top encoder tool and click "Encode". The Base64 result appears below. Supports Unicode text through UTF-8 encoding.
To decode: paste a Base64 string in the bottom decoder tool and click "Decode". The original text appears below.
What Is Base64?
Base64 is a binary-to-text encoding scheme that represents binary data using 64 ASCII characters. It's commonly used to embed images in CSS/HTML, transmit data in URLs and APIs, store binary data in JSON or XML, and handle email attachments (MIME encoding).
Is This Tool Free?
Completely free. Encoding and decoding happen in your browser using native JavaScript functions. No data leaves your device.
Frequently Asked Questions
What is Base64 encoding?
Base64 is a binary-to-text encoding scheme that converts data into a string of 64 ASCII characters. It is commonly used in APIs, JWT tokens, email attachments, and embedding images in HTML/CSS.
Is this tool private?
Yes. Encoding and decoding happen entirely in your browser using the native btoa() and atob() JavaScript functions. Your data is never transmitted to any server.
Is Base64 encryption?
No, Base64 is encoding, not encryption. Anyone can decode a Base64 string — it provides no security. Use proper encryption (AES, RSA) for sensitive data.
Can I encode/decode files?
This tool works with text strings. For file encoding, you would need to read the file as binary first.
Is it free?
Yes, completely free and unlimited.