Table Detection & Structure
Finds the data on your sheet, even when it's split into several scattered blocks with multi-level or merged headers, and combines it into one table.
AI for Excel & CSV
Free Online AI Data Cleaning Service
Upload a single sheet of Excel or CSV. Our AI reshapes it into one clean, tidy table and reports the data issues it finds. No sign-up required.
Sheet 1
scattered tables, blanks, duplicates, mixed formats
Data
⚠ Issues
- 3 duplicates
- 2 bad dates
- 1 missing
+ a second sheet listing every issue found
✗Multi-tab workbooks aren't supported✗Formulas are ignored
🍀
Drag & Drop or Click to Upload your File
Allowed: .xlsx, .csv · Max size: 1 MB
Single-sheet files only. Other tabs aren't supported; Excel formulas are ignored.
0Sign-ups required
<5 minTypical cleaning time
AIPowered cleaning pipeline
PrivateYour file is not stored long-term
What it does
Discover what CleanMyExcel can do
Our AI reads and understands your sheet, then applies a smart sequence of cleaning steps to turn it into one analysis-ready table.
Tidy Table Formatting
Your data is reshaped into a single, well-structured table with a clear schema, following tidy-data best practices.
Spreadsheet Normalization
Automatically assigns appropriate data types to each column using statistical and semantic inference.
Data Validation & Issues
Audits your data quality to spot inconsistencies, and lists every issue it finds in a dedicated Issues sheet.
How it works
From messy to tidy, in three steps.
- 01
Drop one sheet
Upload one Excel or CSV sheet. Up to 1 MB, no account, no install.
- 02
AI tidies it
We merge scattered tables into a single tidy table, normalize types and flag data issues automatically.
- 03
Get it back
Receive a clean table plus an issues report by email, ready for analysis.
Resources
Learn more
Guides, comparisons and deep-dives to get the most out of CleanMyExcel.io.
AI Data Cleaning
How our AI cleans messy Excel and CSV files automatically.
CSV Cleaner
Free AI tool to fix delimiters, encodings and duplicates in CSVs.
Best AI Data Cleaning Tools
Compare CleanMyExcel.io with OpenRefine, Trifacta and more.
How to Clean Data in Excel
A 6-step manual guide for the classic Excel approach.
How to Remove Duplicates in Excel
Five methods, from exact matches to fuzzy deduplication.
Validate My Data
Detect invalid formats, wrong types and out-of-range values.
Reshape My Data
Convert messy wide tables into tidy long format.
Parse My CSV Data
Repair broken CSV files with AI-assisted parsing.
Tidy Data Principles
Why data cleaning matters and what tidy data really means.
AI-Powered Assistant
The philosophy behind our AI data cleaning workflow.
FAQ
Frequently asked questions
Support the project
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