Base64 Encoder / Decoder
Convert text to Base64, decode Base64 to text, or drag-and-drop images to get data URIs. Everything runs in your browser -- nothing is sent to a server.
Frequently Asked Questions
What is Base64 encoding?
Base64 is a binary-to-text encoding that converts data into 64 safe ASCII characters. It's used to embed images in HTML/CSS, encode email attachments, and transmit binary data over text protocols.
Why is Base64 output ~33% larger?
Every 3 bytes of input become 4 bytes of Base64 output. The tradeoff: encoded data is safe for any text-based system (URLs, JSON, XML, email).
Can I encode images?
Yes. Drag and drop an image onto the Base64 panel (or click Upload File) to get a data URI. Paste an image data URI to see a live preview.
Is Base64 encryption?
No. Base64 is encoding, not encryption. Anyone can decode it instantly. For security, use real encryption (AES, RSA) or hashing (SHA-256).
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