About this site

This site exists for one job — a signature generator that gives a clear answer quickly and shows how it was reached.

How the tool is checked

Before an update is published, the tool runs through 84 automated checks in a real browser: worked examples are recalculated, edge cases and wrong input are tried, and the layout is checked on desktop and on a phone.

Sources

The formulas and reference values in the guides follow published standards and primary sources, linked where they are used: law.cornell.edu, w3.org.

Our approach

Pages are written and maintained by the site's editorial team. We aim to answer the question people actually ask, show worked examples with real numbers, and say plainly where a calculator cannot replace professional advice. Nothing on this site is sponsored content.

Updates and corrections

Published October 8, 2026, last reviewed October 12, 2026. Corrections are welcome via the contact page; confirmed fixes go out with the next update.

Advertising

The tool is free to use. The site is funded by advertising, which never influences results or explanations.

— Signature Generator editorial team