Base64 Encoder & Decoder

No, Base64 is not encryption and provides no real security. It's simply a way to represent binary data as text, and anyone can decode it back to the original content instantly using any Base64 decoder. Never use it alone to protect passwords or sensitive information.

The equals sign is padding added when the input data length isn't perfectly divisible by 3 bytes, which Base64 encoding requires for its grouping process. This padding tells the decoder exactly where the actual data ends, ensuring the original bytes are reconstructed correctly.

Base64 encoding increases file size by roughly 33 percent because it represents every 3 bytes of binary data using 4 text characters. This tradeoff is accepted because it allows binary content to travel safely through systems built only to handle plain text.

No. All encoding and decoding, including image conversion, happens entirely inside your browser using built-in JavaScript functions. Nothing you type or upload is ever sent to a server, which makes this tool safe for confidential text or private images.

A data URI lets you embed a small image directly inside your HTML or CSS file instead of linking to a separate image file, which can reduce the number of HTTP requests a browser needs to make. It's best suited for small icons or images, since large files make the encoded text unwieldy.