Encode / Decode

Base64, Base64URL, URL, HTML entities, hex and Unicode escapes.

Runs entirely in your browser. Nothing you type or paste is sent anywhere.

Standard Base64 of the UTF-8 bytes, with = padding. Decoding also accepts Base64URL, missing padding and line breaks.

Text

The encoded result appears here as you type.

Drop a file, or choose oneImages, fonts, icons — up to 25 MB

Turn a small image, font or icon into a Base64 data URI you can paste into HTML or CSS.

Decode JWTs, explain the claims, check expiry and verify HMAC signatures locally.

MD5, SHA-1, SHA-256, SHA-384, SHA-512 and HMAC for text or files.

Generate UUID v4/v7, ULIDs and nano IDs in bulk; decode the timestamp inside v7 and ULID.

Strong passwords and passphrases from the browser’s secure random source, with entropy.