Table Detection & Structure
Detects how many tables are present, finds their boundaries, identifies multi-level headers and handles merged cells in context.
AI for Excel & CSV
Free Online AI Data Cleaning Service
Your AI-powered data-cleanup assistant for Excel and CSV files. Get clean, structured dataframes in minutes, with no sign-up required.
🍀
Drag & Drop or Click to Upload your File
Allowed: .xlsx, .csv · Max size: 1 MB
Only the active spreadsheet is processed. Excel formulas are not considered for now.
- Well-normalised dataframe
- Correct formats, types, and value ranges
- Detect missing values and anomalies
- Catch near duplicates
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 model reads and understands your spreadsheets, then applies a smart sequence of data cleansing operations to prepare your files for analysis.
Excel Table Formatting
Your data is reformatted into clean, well-structured tables 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 & Fixes
Audit your data quality to spot inconsistencies and inaccuracies, and automatically fix errors with AI assistance.
How it works
From messy to tidy, in three steps.
- 01
Drop your file
Upload your Excel or CSV file. Up to 1 MB, no account, no install.
- 02
AI cleans it
Detection, normalization, validation and error correction run automatically.
- 03
Get it back
Receive a clean, well-structured dataframe 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
Found CleanMyExcel useful?
The service is free, ad-free and account-free. If it saved you time, a small coffee goes a long way to keep the servers running.
