Encode and decode text: Base64, percent-encoding, HTML entities, Unicode escapes, binary and hexadecimal. 12 tools in one editor — paste your text once and run any of them, or open any tool on its own page. Everything happens in your browser.
Base64 turns binary data into plain characters so it can travel inside text, such as an image embedded in a stylesheet or a value in a JSON field.
No. It is an encoding, not a cipher. Anyone can decode it, so never use it to protect a secret.
URL encoding replaces characters that would confuse a web address. HTML encoding replaces characters that would otherwise be read as markup.
Usually because whitespace, a line break or a URL-safe variant crept in. Check the string is complete and correctly padded.