Developer Tool

Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 to readable text instantly. Supports UTF-8 and Unicode. Free, private, works offline.

How to use this base64 encoder / decoder

1
Type or paste text, or a Base64 string.
2
Click Encode or Decode.
3
Copy the result with one click.

Frequently asked questions

▸What is Base64?

Base64 is an encoding that represents binary data as ASCII text using 64 characters. It is commonly used to transmit data over media designed for text, such as email and JSON.

▸Why does my decoded text show weird characters?

Base64 strings without padding or with URL-safe characters can decode unexpectedly. This tool supports standard and URL-safe Base64 and handles UTF-8 correctly.

▸Is my data uploaded to a server?

No. Encoding and decoding happen entirely in your browser.

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