Base64 Encoder & Decoder

No. Base64 is an encoding scheme, not encryption. Anyone with the Base64 string can decode it back to the original data instantly. It should not be used to secure sensitive information. For security, use proper encryption algorithms such as AES or RSA.

Base64 increases the data size by approximately 33%. Every 3 bytes of input data become 4 Base64 characters. This overhead is the trade-off for representing binary data using only safe ASCII characters.

A data URI is a URI scheme that embeds data inline in a web page. For example, a Base64-encoded image can be embedded directly in HTML as: . This eliminates a separate HTTP request for the image resource.

Standard Base64 uses + and / characters, which must be URL-encoded in query strings. URL-safe Base64 replaces them with - and _ respectively. If you need URL-safe Base64, use the URL-safe option if available, or manually replace + with - and / with _ in the output.

Yes. All encoding and decoding happens entirely in your browser. Your text and images are never sent to any server, stored anywhere, or accessible to anyone else. The tool processes everything locally using built-in browser APIs.