A second set of eyes for spreadsheets people actually rely on.
Spreadsheet Checkup is a free, no-signup workbook review tool built to surface quiet spreadsheet risks before they turn into reporting, planning, billing, or decision-making problems. It focuses on evidence a reviewer can inspect, rather than pretending that automated analysis can certify a workbook as correct.
Why Spreadsheet Checkup exists
Many spreadsheet failures are not dramatic. A workbook can open normally, calculate without an obvious warning, and still contain a copied formula that drifted, a pasted value that replaced a formula, a hidden dependency, a duplicated key, or a total that quietly misses the newest rows.
Spreadsheet Checkup was built around that problem. The goal is not to replace Excel, an accountant, an analyst, or a careful manual review. The goal is to make the first review faster and more systematic by pointing to cells and workbook structures that deserve a closer look.
What the tool is designed to do
Surface stronger defect signals
Broken references, formula interruptions, circular dependencies, missing worksheets, and other findings with concrete structural evidence are prioritized for attention.
Find patterns that deserve review
Formula drift, embedded assumptions, hidden content, external links, volatile functions, and inconsistent formats can be intentional, so the report presents them as review signals rather than automatic verdicts.
Keep the evidence close
Findings identify the worksheet, cell or range, supporting evidence, confidence, and a practical next step so a human reviewer can verify the issue in context.
Stay read-only
The checker reports what it finds. It does not rewrite formulas, repair cells, execute macros, or silently alter the workbook.
What it deliberately does not claim
A static workbook scan cannot understand every business rule behind a spreadsheet. Spreadsheet Checkup does not recalculate formulas with Excel's calculation engine, execute VBA, refresh Power Query or external data, validate accounting treatment, prove regulatory compliance, or guarantee that a workbook is fit for a particular decision.
That limitation is intentional and visible throughout the product. A useful checker should help a reviewer ask better questions, not replace judgment with a false green checkmark.
Built and maintained by Dan Ross
Spreadsheet Checkup is an independent software project built by web developer Dan Ross. The product, its analyzer rules, the public demo workbook, the documentation, and the review guides are maintained as one project so the site can explain what the software actually checks instead of publishing generic spreadsheet advice disconnected from the tool.
You can learn more about the builder and other software projects at dan-ross.dev, or use the contact form for feedback.
Transparency is part of the product.
The full check catalog explains the signals the analyzer looks for, and the How It Works page explains how a workbook moves from upload to prioritized report.
Browse every check