Free tools

Last reviewed: August 30, 2026 · Markdown version

Small, free tools that run entirely in your browser — no sign-in, no account, and nothing you type is sent anywhere. Use them with or without the app.

• Email Hoarder Calculator — enter how many emails are sitting in your inbox and get the estimated storage they hold, how long clearing them by hand would take, and your official hoarder rank (shareable, if you dare).
• Gmail Cleanup Query Builder — tick what you want to find and get the exact Gmail search to paste into the search box, built only from operators Google documents.
• Storage Diagnoser — two or three questions and you land on the fix for your actual storage problem, including the ones an email cleaner can't fix.
• Inbox Time-Cost Calculator — how much of your year goes to email you never wanted, in hours and work-weeks, on assumptions you choose yourself.

More tools will appear here over time. Looking for help with a storage problem instead? Every storage-full question has one honest answer each in Answers. Suggestions welcome: support@zeninboxcleaner.com.