Tool

Base64 / URL Encoder

Encode or decode text as Base64 or URL. Non-ASCII characters are handled correctly as UTF-8. You can also turn a file into a data URI.

Runs in your browser — no data is sent to the server.

Format

Direction

URL-safe (base64url: - _, no padding)

Text

Output

Data URI from a file

File (up to 10 MB)

Base64 only (without thedata:…;base64, prefix)

Result

When decoding, both the standard and the URL-safe alphabet are accepted. Spaces, line breaks and missing = padding are fine.
If the decoded data is not UTF-8 text (an image, a zip…), a hex view is shown and you can download it as a file.
URL mode follows the encodeURIComponent rules; suitable for query parameter values.