Validate Your Data Without Compromising Your Security

DataCheckr AI for Excel helps you review the quality of the data in your workbook. It scans your chosen sheet, identifies potential issues and explains why each one might be a problem.

Instead of manually scrolling, filtering and guessing where errors might be, you see a structured view of issues that you can work through at your own pace.

DataCheckr AI for Excel does not change any cells for you. It guides you to the right places and helps you understand what needs attention, while you decide what to update and how.

DataCheckr AI for Excel focuses on the kinds of problems that often slip past basic Excel checks and formulas.

DataCheckr AI for Excel helps you identify:

• Missing or incomplete data – gaps that can distort totals, averages and reports.
• Duplicate records – rows that appear more than once and may impact counts and summaries.
• Type mismatches – for example, numbers stored as text or dates stored inconsistently, which can break formulas and filters.
• Format mismatches – such as phone numbers, IDs or postcodes that don’t match expected patterns.
• Outliers and unusual values – entries that don’t fit normal ranges or patterns and may indicate data entry errors.
• Invalid data types or values – entries outside allowed lists or ranges for a given field.
• Cells with Excel errors – such as #VALUE!, #DIV/0! and similar.

The exact checks run depend on the structure of your data and the patterns DataCheckr AI observes, and it refines its heuristics over time as you continue to use it.

When you run DataCheckr AI on a sheet, it follows a clear review process:

• Scan
  It reviews values across columns and rows to understand typical ranges, formats and relationships.
• Group
  It organises findings into clear categories (missing data, duplicates, type mismatches, and so on) so you can work through them logically.
• Explain
  For each potential issue, DataCheckr AI tells you what it has found and why it believes it may be a problem, in plain language.
• Guide
  It helps you navigate to the affected cells so you can decide how to handle each case – whether to correct the data directly in Excel or step through issues using the DataCheckr AI for Excel interface.
• Learn
  When you treat something as an error or decide it is acceptable, that feedback is used to refine the heuristics it applies to similar data in future.

There are no automatic or batch fixes today. You remain fully in control of what is changed and how, with DataCheckr AI acting as an assistant rather than an autopilot.

With DataCheckr AI for Excel, you can expect:

• A clearer view of issues – problems grouped by type instead of scattered across the sheet.
• Simple explanations – understand why something is flagged before you spend time on it.
• Full control over changes – you decide which cells to update and how.
• A tool that gets smarter with you – similar datasets become quicker to review over time as heuristics improve.
• Greater confidence in your spreadsheets – especially when they feed into important decisions or external submissions.

If you are comfortable working with data in Excel, you will be able to use DataCheckr AI without learning new scripting or complex formulas.

DataCheckr AI for Excel is built on the principle that your data stays in your spreadsheet.

• All analysis happens with your workbook. The add-in is designed so that checks are performed locally against the data in Excel, rather than uploading your spreadsheet contents into a DataCheckr AI cloud service for processing.
• We do not store or reuse your underlying data values. What we retain are high-level heuristics – patterns and rules about what valid data looks like – not the data itself.
• Any information under our control, such as these heuristics and supporting service data, is encrypted in transit and at rest.

You gain the benefits of AI-supported checking and continuous learning, without handing raw spreadsheet data over to us. For a full explanation of how we handle security, privacy and compliance, see our Trust & Data Protection page.

Getting started is straightforward:

• Install DataCheckr AI for Excel from Microsoft AppSource.
• Open a workbook that contains data you care about.
• Launch the DataCheckr AI for Excel add-in from the ribbon.
• Select the sheet you want to analyse and run a scan.
• Work through the issues grouped by type, using the explanations to decide what to fix and how.

For step-by-step walkthroughs and examples, visit our Resources page, where you’ll find instructional videos, tips and FAQs.