Building real things, in public
Notes from DEMHA FUTURE — how we build apps fast with AI, and what we learn.
ASCII Table — free online reference
A searchable ASCII and character table, free and online. Look up any code from 0 to 255 right in your browser, nothing uploaded.
Aspect Ratio Calculator — free online tool
Find the missing width or height for any aspect ratio, free and online, right in your browser with nothing uploaded.
Australia GST Calculator (10%) — free online
Add or remove Australia's 10% GST in AUD with this free online tool. It runs right in your browser and nothing is uploaded.
Austria VAT Calculator — free online
Add or take out Austrian VAT (20%, 13% or 10%) in euros for free online, right in your browser with nothing uploaded.
Authorization Letter Generator — free online
Make a clean letter of authorization right in your browser, free and online. Fill in the form, copy or print it, nothing uploaded.
Avatar Generator — free online tool
Make circular initials or geometric identicon avatars in your brand colors, right in your browser. Free online, nothing uploaded, export PNG or SVG.
Background Remover — free online
Remove a photo background online, free and right in your browser — the AI runs on your device, so nothing is uploaded.
Banner Maker — free online tool
Make a profile banner for X, LinkedIn, YouTube or Twitch right in your browser, free. Pick a size, add text, choose colors, download a PNG. Nothing uploaded.
Barcode Generator — free online tool
Make a real, scannable barcode online for free, right in your browser. Pick Code128, EAN-13 or UPC-A, then download a crisp PNG or SVG. Nothing is uploaded.
Base64 Encode / Decode — free online
Encode text to Base64 or decode it back, free and online, right in your browser with nothing uploaded.
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