🔒Encoding & Decoding Tools

Encoding and decoding tools for the small format conversions that come up constantly in development, security work, and data plumbing: Base64 in both directions, URL-encoding and -decoding for query strings, text-to-binary for educational demonstrations, and the bidirectional flips that should take five seconds but somehow always take five minutes because the right CLI option is not in your shell history. Every tool runs in your browser, so the value you encode or decode is not transmitted; this matters for Base64-encoded secrets, OAuth state parameters, or anything you would not paste into a public web form. The common assumption that bites people is that URL-encoding and HTML-encoding are the same thing; they overlap but they are not interchangeable, which is why the URL Encoder Decoder Tool calls out the specific spec it follows (RFC 3986) and handles the corner cases (plus signs in query strings, percent-encoded forward slashes in path segments) consistently. If you are new to the category, start with the Base64 Decode and Encode tool for anything related to credentials, tokens, or data URIs; the URL Encoder Decoder Tool for any URL you are building programmatically; and the Text to Binary Converter when you want to show a student or junior teammate how character encoding actually works at the byte level.

3 tools available