About

Inboxwise Tools builds small, focused tools for people who run email marketing without a big team: shop owners, freelancers, consultants and newsletter writers.

What we believe

• Free tools should be genuinely useful — not a sign-up form in disguise.
• Your data is yours. Our tools run in your browser, so we never see what you type.
• Show the math. Every tool explains how it works and what it assumes.

Who runs this site

Inboxwise Tools is operated by Keigo Matsumoto. You can reach us at zxtyzr45@gmail.com.

How the site is funded

The tools are free. We may earn commissions from some email software providers we link to. Read our Affiliate Disclosure for details.