Most repair tools are a black box: file in, file out, no idea what changed. This one checks every part of an Excel, Word or PowerPoint file against ECMA-376 and shows the exact fault, down to the cell or slide. It catches what AI-generated files get wrong, like numbers stored as text or totals that don't add up. No file comes back unless Microsoft's Open XML SDK accepts it. New: an API, so your code or AI agent can check files before a customer opens them. Free, with 500 API calls a month.
