Does this tool support URL-safe Base64?

Yes. The encoder can output URL-safe Base64 and the decoder accepts both standard and URL-safe variants.

Can I decode unpadded Base64?

Yes. The decoder accepts Base64 strings with or without trailing padding.

Does my text leave the browser?

No. Encoding and decoding happen locally in your browser, so your data is not uploaded to a server.

Is Unicode supported?

Yes. The tool uses browser-native text encoding APIs so emoji, accented characters, and non-Latin text are handled safely.

Free Base64 Encoder / Decoder | URL-safe Base64 Tool

Base64 Encoder/Decoder

Encode text, decode Base64, and switch to URL-safe output when you need it.

ModeEncode

AlphabetStandard

OutputStandard Base64

Input

Text to encode

Type or paste plain text. Unicode is handled safely.

148 input bytes200 output bytes

Output

Standard Base64

Processing happens locally in your browser.

RGV2b3JhIEJhc2U2NCBkZW1vCgpFbmNvZGUgbWUsIGRlY29kZSBtZSwgb3Igc3dpdGNoIHRvIFVSTC1zYWZlIG91dHB1dCBmb3IgcXVlcnkgc3RyaW5ncyBhbmQgZmlsZSBuYW1lcy4KU3ltYm9sczogKyAvID0KVW5pY29kZTogY2Fmw6ksIPCfmoAsIOadseS6rA==

Alphabet: StandardEncode text or decode Base64 locally in your browser.

What this covers

Standard Base64 for regular payloads, plus URL-safe Base64 for query strings, paths, and token-like data.

Input behavior

Decoder accepts both standard and URL-safe alphabets, with or without trailing padding.

Why it matters

It keeps the common encode/decode loop in one place and removes the annoying padding and alphabet edge cases.