Expertise is already inside
Every cleaning decision (detecting scattered tables, spotting near-duplicates, inferring types) is encoded in the pipeline. You do not have to describe what clean means.
AI for Excel & CSV
AI data cleaning for Excel & CSV, done for you
Upload one sheet of Excel or CSV. We apply years of data-cleaning expertise in one pass: tidy structure, correct types, every issue flagged. No prompting, no configuration, no sign-up.
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
Why not just use ChatGPT?
You can. But you become the data cleaner.
General AI tools clean your data only if you tell them exactly how. We already know how.
One upload replaces an hour of prompting
No defining the rules, no correcting mistakes, no re-running to check the output stayed consistent. Drop the file, get the tidy table.
Deterministic, not a dice roll
Same file in, same tidy table out, every time. A general chat model gives you a capability; you still have to be the expert steering it.
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.
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.
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.
How it compares
The outcome, not the process
| CleanMyExcel | ChatGPT / Claude | OpenRefine / Power Query | |
|---|---|---|---|
| Time to result | Minutes, one upload | Minutes of prompting per file | Hours of learning and setup |
| What you decide | Nothing | Everything (what does clean mean?) | Every transformation step |
| Consistency across runs | Deterministic | Varies run to run | Deterministic if you repeat the steps |
| Learning curve | None | Prompt skill required | Steep |
| Issues audit | Included (Issues sheet) | Only if you ask | Depends on the tool |
| Best for | Wanting data cleaned | Enjoying prompting | Fine-grained control |
Pricing
Free today. More coming soon.
Free
Everything you can do right now.
$0
- • One sheet per file
- • Up to 1 MB
- • Tidy table + issues report by email
- • No sign-up, no install
Pro
For people who clean data often.
$19/mo
- • Multi-sheet workbooks
- • Excel formulas evaluated
- • Unlimited and larger files
- • A more powerful model
- • Priority processing
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.
