ENS Namehash Calculator — Free & Private

A free edge API by formatho.com, privacy-first developer tools.

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Free, no signup, runs entirely in your browser — your data never leaves your device.

🔓 Free🔒 Zero tracking🚫 No data collection⚡ Edge-fast

Usage

curl "https://ens-namehash-formatho.filesformatho.workers.dev/api?name=alice.eth"
# → { "namehash": "0x787192fc5378cc32aa956ddfdedbf26b24e8d78e40109add0eea2c1a012c3dec", "labels": [...], ... }

curl "https://ens-namehash-formatho.filesformatho.workers.dev/api?name=eth"
# → { "namehash": "0x93cdeb708b7545dc668eb9280176169d1c33cfd8ed6f04690a0bcc88a93fc4ae", ... }

Pass any ENS name. GET or POST JSON — {"name": "alice.eth"}. Returns the ENSIP-2 namehash plus every label with its individual keccak-256 labelhash. Empty string or "." yields the root node 0x00…00.

How it works: start from 32 zero bytes, then right-to-left over labels: node = keccak256(node ‖ keccak256(utf8(label))) — the exact algorithm ENSIP-2 / EIP-137 specifies.

Full parameter reference: /api endpoint.

Privacy-first: hashing happens in-memory at the edge and your input is never logged or stored.

Full browser tool

Compute namehashes entirely client-side: ENS Namehash Calculator on formatho.com.

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