SheetBrain
Your spreadsheet has bugs. SheetBrain finds them.
SheetBrain is a Google Sheets add-on that finds the bugs your eyes miss: broken references, mixed data types, duplicate lookup keys, and schema drift when columns move or get renamed. It runs a deterministic scan in one click — free, unlimited, no AI call needed. It also generates formulas from plain English. $9/mo Pro tier, AI included, no API keys. Works on free Gmail.
Features
- One-click deterministic health scan (free, unlimited, no AI call)
- Detects broken refs, mixed types, duplicate keys, schema drift
- =SHEETBRAIN_HEALTH() custom function for in-cell health scoring
- Shareable public audit reports (30-day link, no login for viewers)
- Plain-English formula generator that reads your real sheet structure
- AI included in price — no BYO API key, no token fees
- Works on free Gmail (no paid Google Workspace required)
Use Cases
- Finance/ops analysts cleaning quarterly reports before presenting to leadership
- Freelancers auditing client sheets before handing them back
- Founders checking investor-facing models for broken references and mixed types
- Data teams validating spreadsheets that feed into downstream dashboards
- Anyone generating new formulas without ChatGPT tab-switching
Comments
Hey Fazier 👋 I built SheetBrain because I kept spending hours every quarter hunting down why my spreadsheet totals were off — and finding stupid bugs: a mixed-type column where half the "numbers" were strings, a #REF! nobody noticed, a VLOOKUP pointing at the wrong column after someone renamed a header. SheetBrain runs one deterministic scan across your sheet and flags all of that — free, unlimited, no AI quota, no API key. Just type =SHEETBRAIN_HEALTH() in any cell. AI formula generation is in there too for the $9/mo Pro tier — no BYO API key, no token fees, works on free Gmail. Happy to answer questions or debug a sheet if you want to throw one at me.
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Comments
Hey Fazier 👋 I built SheetBrain because I kept spending hours every quarter hunting down why my spreadsheet totals were off — and finding stupid bugs: a mixed-type column where half the "numbers" were strings, a #REF! nobody noticed, a VLOOKUP pointing at the wrong column after someone renamed a header. SheetBrain runs one deterministic scan across your sheet and flags all of that — free, unlimited, no AI quota, no API key. Just type =SHEETBRAIN_HEALTH() in any cell. AI formula generation is in there too for the $9/mo Pro tier — no BYO API key, no token fees, works on free Gmail. Happy to answer questions or debug a sheet if you want to throw one at me.
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