Encoder / Decoder

URL (double)

Apply URL encoding twice — useful when a decoder runs once server-side.

HTML entities

Escape markup with numeric or named entities.

Unicode

Escape to \u sequences for script-context filters.

Hex

Byte-level \x escaping for tight character blacklists.

Base64

Encode binary-safe strings for data: URIs and atob chains.

Mixed

Layer multiple encodings in one pass for WAF evasion experiments.