Unit & Hex Converter

wei, gwei, ether, hex, keccak256, checksums.

Wei

Gwei

Ether

How it works

Offline

1
Pick a tab
Units, Hex ↔ Decimal, Keccak-256, or Checksum. Each converts as you type.
2
Type in any linked field
The other fields update instantly using exact bigint math; invalid input is flagged without guessing.
3
Copy the result
Every output field has a one-click copy button.
4
Nothing leaves your browser
This tool never makes a network request. All conversion runs in your browser.

How it works

Offline

1
Pick a tab
Units, Hex ↔ Decimal, Keccak-256, or Checksum. Each converts as you type.
2
Type in any linked field
The other fields update instantly using exact bigint math; invalid input is flagged without guessing.
3
Copy the result
Every output field has a one-click copy button.
4
Nothing leaves your browser
This tool never makes a network request. All conversion runs in your browser.