Is this Base64 encoder sending data to a server?

No. Encode and decode run locally with the Web APIs in your browser.

Does it support unicode?

Yes. Text is converted with UTF-8 before encoding, and decoded back to unicode text.

The input must be valid Base64 (A–Z, a–z, 0–9, +, /, and padding). Extra symbols or truncated strings will produce a clear error.

Encoding

Encode and decode Base64, including Unicode text, locally in your browser.

LocalProcessed locally — your text never leaves your browser.

InputText or Base64

OutputResult

Enter text to encode or Base64 to decode. Unicode is supported.

1. Enter plain text or Base64
Type or paste into the input. Unicode is supported. Encoding and decoding run in your browser.
2. Encode or decode
Encode turns text into Base64. Decode turns Base64 back into text. Ctrl+Enter / Cmd+Enter encodes. Swap exchanges input and output.
3. Copy the result
Copy the output when you need it. Clear resets both panels.

Encode ASCII
hello becomes aGVsbG8=.
Encode unicode
Characters such as 世界 are encoded with UTF-8, then Base64. Decoding restores the original text.

Is this Base64 encoder sending data to a server?: No. Encode and decode run locally with the Web APIs in your browser.
Does it support unicode?: Yes. Text is converted with UTF-8 before encoding, and decoded back to unicode text.
Why did decode fail?: The input must be valid Base64 (A–Z, a–z, 0–9, +, /, and padding). Extra symbols or truncated strings will produce a clear error.

Encoding
URL Encoder / Decoder
Encode and decode URL components, including Unicode, in your browser.
Open tool
Data
JWT Decoder
Decode a JWT header and payload in your browser. Decoding does not verify the signature.
Open tool