Building real things, in public
Notes from DEMHA FUTURE — how we build apps fast with AI, and what we learn.
Sales Tax Calculator — free online
Add US sales tax to any price by your own rate, free and online — right in your browser, with nothing uploaded.
Saudi VAT Calculator (15%) — free online
Add or remove 15% Saudi VAT in SAR free and online, right in your browser with nothing uploaded.
Savings Goal Calculator — free online
Find out how long it takes to reach your savings goal and the exact date, free and online, right in your browser with nothing uploaded.
Schema Markup Generator — free online
Build valid JSON-LD schema for your page online for free, right in your browser. Pick a type, fill the fields, copy the code. Nothing is uploaded.
Scientific Calculator — free online
A free online scientific calculator with sin, cos, tan, log, square roots and powers — right in your browser, nothing uploaded.
Screenshot Beautifier — free online tool
Make a plain screenshot look clean with a gradient background, padding, rounded corners and a soft shadow — free and online, right in your browser, nothing uploaded.
Script Timing Calculator — free online tool
Paste a script and see if it fits a 15, 30, or 60-second slot. Free and online, right in your browser, with nothing uploaded.
Sell-Through Rate Calculator — free online
Work out your sell-through rate from units received and sold. Free and online, right in your browser, with nothing uploaded.
Google SERP Snippet Preview — free online
See how your page looks in Google before you publish. Check your title and description for cut-off, free and online, right in your browser.
SERP Snippet Preview — free online tool
See how your page title and description will look in Google before you publish, right in your browser, nothing uploaded.
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