Free tools

Small tools we built while solving our own problems. Free, no sign-up, no tracking — the code runs in your browser.

Floor price from material, failure rate, hours, shipping and platform fees. Runs offline in your browser.

● live

Listing photo checklist

The five shots a listing needs, with a printable check.

○ planned

Fee-and-shipping comparison sheet

Compare what the same sale costs across marketplaces.

○ planned

Want a tool that is not here? Email owen@orangeknows.com with the calculation you keep doing by hand. OK — dated, checkable.