Use this encoder when a receiving system, file format, protocol, puzzle, or historical cipher explicitly requires the named representation and its alphabet or key convention is known.

values

Integers to encode.

Encode integers with the zigzag mapping: n≥0 → 2n, n<0 → −2n−1. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

codes

Zigzag codes (non-negative).

• Encoding changes representation, not trustworthiness or meaning. Alphabet variants, padding, line wrapping, character encoding, byte order, unsupported characters, and malformed Unicode can affect interoperability; classical ciphers and checksums do not provide modern confidentiality or authenticity.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Round-trip representative values through the matching decoder and verify published test vectors where available. Use authenticated encryption for security and a cryptographic hash or MAC when integrity against an adversary is required.

• Unsigned Varint Encoder

  Encode an exact decimal integer from 0 through 2^64−1 as unsigned LEB128 bytes, shown as uppercase hexadecimal. Signed zigzag encoding is a separate tool.

• Gray Code Encoder

  Convert a non-negative integer to its reflected binary Gray code.

• Rail Fence Encoder

  Encode text using the Rail Fence (zigzag) cipher.