Base64 Encoder / Decoder

No, and that matters for security. Searches for base64 decrypt are really asking about decoding, because Base64 is a reversible transport encoding with no key involved. Anyone can decode 64-character tokens or anything else encoded this way, so never treat it as protection for secrets.

Paste the encoded value and press Decode. That's the whole base64 to text step: the tool trims stray whitespace, converts the string, and shows the original in the Output pane. If the input isn't valid, you'll see a Not valid Base64 error rather than a mangled result.

Basic auth joins a username and password with a colon, then encodes the pair so it travels safely inside an ASCII header. Type user:pass here and click Encode, and you have the header value ready. Since it runs as a base64 encode online step in your browser, the credentials stay on your machine.

Yes, for text-based content like SVG or JSON. Remove the prefix up to and including the comma, then paste the remainder and decode. Binary formats like PNG won't show as readable text here, since this page works with strings rather than files.

Not at all, the spacing is just a search habit and both point to the same operation. Whatever you type into a search box, the encoding itself follows RFC 4648: three bytes of input become four characters of output, with = signs padding the end.

Yes. The tool converts your text to UTF-8 bytes before encoding, so Japanese, Arabic, or emoji characters decode back exactly as entered. Plenty of quick scripts call btoa directly and corrupt anything outside Latin-1, which is the bug this page avoids.

That's the point of the two buttons. You get encode decode online in a single view, so checking a value in both directions takes seconds. Run base64 decode online on a token, tweak the text, then re-encode it without switching tabs.

Paste the text in the Input pane and click Encode; that's the whole string to base64 online step. To encode string to base64 the tool converts your characters to UTF-8 bytes first, so a search for convert string to base64 online lands on exactly this one-click action.

Yes, with no sign up and no limit. It's a base64 encoder and decoder online in one view, so you can encode text to base64 free and decode it back without switching pages. Both buttons sit above the same input.

It handles standard Base64 directly; for base64url decode, swap the URL-safe characters (- back to + and _ back to /) before you paste, then click Decode. To decode base64 string online otherwise, paste the value, press Decode, and the original text appears.

The Encode button produces standard Base64, which can include + and /. For a base64 url encode result, replace those with - and _ after encoding and drop the padding, since this page outputs the standard alphabet rather than the URL-safe variant.

Not here, because this page works with text you paste, not uploaded files. A file to base64 online converter reads binary and offers a download, which is a different tool; to base64 encode file contents you'd need one that accepts an upload. For text, config blobs, and tokens, paste them straight in.

No. Images are binary, and this tool encodes and decodes text strings, so it isn't a base64 image encoder online. It can decode the text part of a data URI, like an inline SVG, but a PNG or JPEG needs a file-based encoder instead.