Base64 is a way to represent binary data as plain ASCII text. It is commonly used to embed images or files in HTML, CSS, and JSON.
You can decode any valid Base64 string back to its original text or binary content.
No. Base64 is encoding, not encryption. Anyone with the encoded string can decode it instantly. Do not use it to secure sensitive data.
Base64 strings contain only letters (A-Z, a-z), digits (0-9), plus (+), slash (/), and equals (=) for padding. They are usually a multiple of 4 characters long.
Yes. Paste the Base64 string (without the data URI prefix) and the tool will decode it back to the original image data.
URL-safe Base64 replaces + with - and / with _ to make the encoded string safe for use in URLs and filenames without percent-encoding.
Yes. Use atob with your Base64 string in JavaScript in the browser, or Buffer.from with base64 encoding in Node.js.