Building real things, in public
Notes from DEMHA FUTURE — how we build apps fast with AI, and what we learn.
Image to Base64 — free online converter
Turn an image into a Base64 data URL, or back into an image — free and online, right in your browser with nothing uploaded.
Image to PDF — free online, no install
Turn JPG, PNG and WebP pictures into one PDF online, free and right in your browser — nothing is uploaded.
Image to SVG Converter — free online
Turn a PNG or JPG into an SVG online and free, right in your browser, with nothing uploaded anywhere.
Income Tax Calculator — free online
Work out your after-tax pay or the tax from a flat rate, both ways, right in your browser with nothing uploaded.
India GST Calculator — free online tool
Add or remove India GST on any price in ₹, free and online, right in your browser with nothing uploaded.
Instagram Grid Planner — free online
Plan your Instagram feed before you post: preview the 3-wide grid and drag photos to reorder, free and online, right in your browser.
Interview Scorecard Generator — free online
Score job candidates fairly with weighted skills and notes, then save the result as a PDF. Free and online, right in your browser, nothing uploaded.
COGS Calculator — free online tool
Work out your cost of goods sold from inventory and purchases, free and online, right in your browser with nothing uploaded.
Inventory Turnover Calculator — free online
Work out your stock turnover ratio and days inventory from COGS and average inventory, free and online, right in your browser with nothing uploaded.
Invoice Generator — free online, no signup
Make a clean PDF invoice online for free, right in your browser. No signup, no watermark, and nothing is uploaded.
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