Free Online Tool

UUencode

Unix-to-Unix encoding for binary data transmission.

UUencode/UUdecode

Unix-to-Unix encoding for binary data transmission through text-only channels

Operation Mode

Filename

Unix Mode

Text to Encode

Characters: 0Bytes: 0

UUencoded Output

Example Data

Click any example to try it

Hello World!

Simple text

The quick brown fox jumps over the lazy dog

Pangram

Line 1 Line 2 Line 3

Multi-line text

How to Use UUencode

Enter text in Encode mode.
Set the filename and Unix mode stored in the header; defaults are file.txt and 644.
The component converts UTF-8 bytes into UUencoded 6-bit characters and adds begin/end lines.
Paste a complete block into Decode mode to recover its text and header metadata.

UUencode groups three bytes into four printable 6-bit symbols and prefixes each data line with its decoded byte length.

Default header, two-byte input:

Output:

begin 644 file.txt "2&D` ` end

Default header, five-byte input:

Hello

Output:

begin 644 file.txt %2&5L;&\` ` end

All processing happens in your browser. No data is sent to servers.

No registration, no limits, completely free to use.