mrg19.online
Tools by MatG
Small single-file tools for finance, Excel and prompt writing.
Every one of these runs entirely in your browser. Nothing you paste is uploaded, stored or sent anywhere — open a page, use it, close the tab.
Finance & Excel
- Paste Analyzer Copy from Excel, paste, get the movers. Understands accounting negatives.
- Chart Engine Paste a table, get a recommended chart. Restyle it, export SVG or PNG.
- Formula Toolkit Untangle an inherited Excel formula, or describe what you need and get it built.
- Static Balance Ageing Monitor Paste the monthly GL list, age it, chase the reconcilers.
Prompt builders
- Finance Loop Engine Builds a self-checking finance brief — objective, ground truth, success criteria, stop conditions.
- RACE Pit Wall Answer the questions and the prompt writes itself. Copy it into any AI chat.