Building real things, in public
Notes from DEMHA FUTURE — how we build apps fast with AI, and what we learn.
Add Page Numbers to PDF — free online
Stamp page numbers on every page of a PDF, free and online, right in your browser — pick position, format and start number. Nothing is uploaded.
Split PDF — free online tool
Pull out, delete or rotate PDF pages and save the result online, free. It all happens right in your browser, nothing is uploaded.
PDF to JPG — free online converter
Turn PDF pages into JPG or PNG images, free and online, right in your browser. Nothing is uploaded and nothing is saved.
PDF to Text — free online text extractor
Pull the text out of any PDF and copy it or save a .txt file — free, online, right in your browser, with no upload.
Per Diem Calculator — free online tool
Work out your total travel allowance from a daily rate, with the 75% travel-day rule. Free and online, right in your browser, nothing uploaded.
Percentage Calculator — free online tool
Work out a percentage of a number or a percent change online, right in your browser. It's free and nothing you type is uploaded.
Person Schema Generator — free online
Make a ready-to-paste Person JSON-LD block for your page, free and online, right in your browser with nothing uploaded.
Petty Cash Log — free online tracker
Track petty cash with a running balance and export to CSV, free and online, right in your browser with nothing uploaded.
Phone Number Formatter — free online
Clean up a messy list of phone numbers and flag the bad ones, free and online, right in your browser with nothing uploaded.
Placeholder Image Generator — free online
Make a blank placeholder image at any size, right in your browser. Pick colors, add a size label, then download the PNG. Free and online, nothing uploaded.
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