Free Online Tool

yEnc Encoder

Binary encoding optimized for Usenet transmission.

yEnc Encoder/Decoder

Efficient binary-to-text encoding optimized for 8-bit clean channels

Operation Mode

Include yEnc headers

Line length:

Text to Encode

Characters: 0Bytes: 0

yEnc Encoded Output

Example Data

Click any example to try it

Hello World!

Simple text

The quick brown fox jumps over the lazy dog

Pangram

Binary safe: ÿ

Binary data example

How to Use yEnc Encoder

Enter text and keep Include Header enabled.
Set a filename and line length; defaults are file.dat and 128.
The component converts UTF-8 bytes by adding 42, escaping reserved values, and appending CRC-32 metadata.
Use Decode on the complete block to verify size and CRC before recovering text.

yEnc is an 8-bit transfer encoding. Some encoded bytes display as control-range or extended characters, so the output is shown exactly as generated.

Default header and filename — input:

Output:

=ybegin line=128 size=2 name=file.dat r =yend size=2 crc32=4d170e0e

Default header and filename — input:

Hello

Output:

=ybegin line=128 size=5 name=file.dat r =yend size=5 crc32=f7d18982

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

No registration, no limits, completely free to use.