AI DATENQUALITÄTSPRÜFUNG
Find spreadsheet errors before they become business problems.
Hochladen Excel or CSV and instantly uncover missing values, duplicate rows, mixed data types, invalid dates, suspicious numbers, and outliers—then review prioritized recommendations in one clear dashboard.
✓ Missing and duplicate data
✓ Invalid formats and outliers
✓ Downloadable quality report
Customer-Orders.xlsxQualitätswert 82/100
82/100Needs review
Customer IDE-MailOrder DateStatus
C-1048MissingJul 8, 2026Prüfen
C-1051alex@example.com32/14/2026Invalid
C-1051alex@example.comJul 9, 2026Duplicate
LIVE QUALITY WORKSPACE
Check your spreadsheet now
Your original workbook stays unchanged. SheetWise creates a temporary quality dashboard with a score, issue breakdown, affected data, recommendations, and download options.
🔒 Temporär und privat
Drop your spreadsheet hereExcel or CSV up to 10 MB
Workbook.xlsxBereit for quality check
● Check complete
94Qualitätswert
Your quality dashboard will appear here
Hochladen a workbook to receive a quality score, issue breakdown, affected columns, and recommended fixes.
Workbook.xlsx
Qualitätswert 100/100
100/100Excellent quality
Your workbook is ready for reliable analysis.
No major quality issues were detected.
01
Automatic validation across the active worksheetQuality checks
02
First rows from the analyzed worksheetAffected data
Missing value
Possible duplicate
Invalid value
Needs review
03
No changes have been applied yetBefore and after preview
Before
After
HOW IT WORKS
Turn an unchecked workbook into a clear cleanup plan.
SheetWise reviews the active worksheet, groups issues by severity, highlights affected data, and explains what to fix first.
Hochladen Excel or CSV
Choose a workbook or CSV file. Your original source file is not changed.
Prüfen the quality dashboard
See the score, missing values, duplicates, invalid dates, mixed types, suspicious values, and affected rows.
Korrigieren and download
Follow prioritized recommendations, then download the quality report or export the source data.
VISUAL QUALITY REPORT
See exactly what is wrong—and where.
Instead of a generic warning, SheetWise shows a score, issue category, affected field, sample row, and recommended next step.
76/100Needs cleanup
Missing values18
Doppelte Zeilen9
Invalid dates4
One quality score
Understand the overall condition of a worksheet before reporting, importing, or sharing it.
IDE-MailDate1048Missing07/08/261051a@x.com31/19/261051a@x.com07/09/26
Affected rows and columns
Locate blank cells, duplicates, and invalid formats without scanning thousands of records manually.
1
Fill missing customer emails
14 rows are incomplete in the E-Mail column.
2
Remove duplicate customer IDs
Keep the most recent record for repeated IDs.
3
Standardize date format
Konvertieren text dates to one consistent format.
Prioritized recommendations
Know what to fix first and why the issue matters for formulas, charts, imports, and decisions.
REAL BUSINESS SCENARIOS
Useful anywhere spreadsheet accuracy matters.
Clean CRM exports
Find missing emails, duplicate accounts, inconsistent stages, and invalid close dates before uploading records.
Validate budgets and expenses
Spot blank amounts, suspicious negative values, mixed currencies, and inconsistent date formats.
Prüfen inventory data
Detect duplicate SKUs, missing suppliers, invalid quantities, and outlier unit costs.
Check employee lists
Find missing IDs, repeated employees, inconsistent departments, and invalid start dates.
Prepare campaign reports
Catch blank conversion values, duplicate leads, mixed percentages, and unusual spend entries.
Prepare files for import
Reduce failed imports by checking required fields, duplicated keys, and formatting before migration.
WHY DATA QUALITY MATTERS
Bad data creates bad totals, broken imports, and unreliable decisions.
A spreadsheet can look complete while still containing blanks, duplicates, invalid dates, mixed formats, or extreme values. A quality check helps you catch these issues before they affect formulas, dashboards, invoices, payroll, customer records, or reports.
- Improve formula and pivot-table accuracy
- Reduce import and migration failures
- Prevent duplicate or incomplete records
- Build more reliable reports and charts
XLSXUnchecked workbookMissing, duplicate, or inconsistent values
→DQQuality dashboardScore, findings, affected rows, and fixes
MANUAL VS SHEETWISE
Replace row-by-row inspection with one repeatable check.
Filter columns, search blanks, compare IDs, and inspect formats
Build helper formulas, sort repeatedly, scan long tables, and still risk missing issues hidden across thousands of rows.
Hochladen once and review one quality dashboard
See the overall score, issue categories, affected data, and prioritized recommendations together.
FAQ
Clean & Standardize Data questions
What file types can I check?
You can upload Excel workbooks and CSV files up to the upload limit shown in the workspace.
What problems can SheetWise detect?
The quality check can identify missing values, duplicate rows, mixed data types, invalid dates, suspicious numbers, outliers, and other detectable consistency issues.
Does SheetWise change my original file?
No. The original workbook remains unchanged. SheetWise creates a temporary analysis and downloadable report.
Can I see which rows contain problems?
Yes. The affected-data section previews rows and highlights cells connected to detectable issues.
Can I download the results?
Yes. You can download a quality report and export the uploaded data as Excel or CSV.
Do I need to print this page?
No. This tool is primarily an interactive quality check. The correct outputs are the downloadable quality report and spreadsheet exports.