Free tool, runs on your device

Release checklist

Example: the quote calculator passes mobile, keyboard, empty data, reset, export, links, secrets and error states before anything is published. Progress stays local; checking boxes is a self-check, not an audit.

0 / 8 done

Mobile 360px: no sideways scroll
Related lesson: M04L15
Keyboard: form completes mouseless
Related lesson: M04L15
Inputs: empty and invalid respond
Related lesson: M05L18
Save: reload keeps, reset asks
Related lesson: M05L19
Export/import: broken file keeps data
Related lesson: M05L19
Links: all open
Related lesson: M08L31
Secrets: no key, password, token
Related lesson: M01L04
Error states: messages say what to fix
Related lesson: M05L18

This list is a self-check, not a security certificate or professional audit.