Tool category

Encoding & Decoding Tools

Encoding changes how data is represented so it can pass safely through a system that treats some characters specially. It is reversible and provides no secrecy. Pick the encoding that matches where the data is going.

Base64 Encoder

Encode Unicode text as Base64 in your browser.

Base64 Decoder

Decode Base64 into readable UTF-8 text.

URL Encoder

Percent-encode text for safe use in URL components.

URL Decoder

Decode percent-encoded URL components into readable text.

HTML Encoder

Encode special HTML characters or decode common entities.

Which encoding do I need?

Base64 is for embedding bytes in text, such as data URIs, email attachments, and JWT segments. URL encoding is for putting values inside query strings and paths. HTML entity encoding is for displaying text literally inside HTML so it is not interpreted as markup.

Unicode matters

Characters outside ASCII, such as é, ü, or emoji, are first converted to UTF-8 bytes. DevKitly's encoders do this explicitly, which avoids the InvalidCharacterError that the browser's built-in btoa() throws on non-Latin text.