Data Cleaning Tool for Messy Spreadsheets
A no-fuss data cleaning tool built for people who don't want to write a Python script just to tidy a CSV before a meeting.
Catch issues before they turn into a resend, failed import, or a question you have to answer later.
Upload your spreadsheet once. Clean That Sheet™ checks for messy data and inconsistent formatting and other common cleanup problems, then shows you a free preview before anything is changed.
Free preview first. Full cleanup only if it helps.
Upload your file to see an issue summary, duplicate groups, blank rows, sample cleaned rows, and cleanup notes. If the preview looks useful, unlock the full cleaned file and change report for $4.99.
Drag & drop your file or screenshot, or browse
Accepts .xlsx, .xls, .csv, .png, .jpg, and .pdf · up to 50 MB
Tip: upload the actual spreadsheet file, not Excel temporary files that start with ~$.
Free scan + cleaned sample. No charge to preview.
No signup. Original file unchanged. View Trust & File Handling
On mobile, screenshots and CSVs work best. Larger Excel files are easier from desktop.
Not ready to upload? See a Sample Cleanup
Built for
Built for business professionals cleaning real spreadsheet messes.
Clean That Sheet™ is made for analysts, bookkeepers, admins, operators, founders, finance teams, and spreadsheet-heavy professionals who need to clean files before sending, importing, merging, or reporting.
- Analysts
- Bookkeepers
- Admins
- Operators
- Founders
- Finance teams
- Spreadsheet-heavy workflows
You do not need to choose the perfect tool first. Upload your Excel or CSV file, review what CTS finds, and unlock only when you are ready.
CTS can also check for duplicate rows, blank rows, spacing issues, inconsistent formatting, messy headers, date cleanup, imported-data problems, and more.
Not sure what your file needs? See everything CTS can check.
How Clean That Sheet™ works
A finished file, not a conversation. General AI tools can help you think through a spreadsheet problem. Clean That Sheet™ is built to help you finish the urgent, repeatable cleanup job.
- Step 1
Upload
Drop in a spreadsheet, CSV, screenshot, or PDF.
- Step 2
Preview
See what CTS would clean before you commit.
- Step 3
Download
Get a cleaned copy when it looks right.
Preview before you pay
How a general chat tool compares to Clean That Sheet™ for the same cleanup job.
With a chat tool
With Clean That Sheet™
Explain the problem and write prompts
Upload the file
Clarify what should be cleaned
Preview what CTS would clean
Check whether the output is usable
Download a cleaned copy
Figure out what changed
Get a Change Report
No prompts. No back-and-forth. Get your file ready before you import, merge, send, or submit it.
What Clean That Sheet™ actually does
Built for messy real-world files. If it has data in it, there is a good chance we can help.
Supported files
- Excel files (.xlsx, .xls)
- CSV exports
- Screenshots (.png, .jpg)
- PDF report tables
Common cleanup outcomes
- Duplicate rows removed or flagged
- Blank rows and empty columns cleared
- Dates and number formats standardized
- Extra spaces and casing cleaned up
- Invalid emails and obvious errors flagged
- Original structure and headers preserved
- Preview flags messy cells before payment.
- Duplicates, blanks, formatting issues, and invalid emails are easier to spot.
- You decide whether the cleanup is worth unlocking.
- Tested on messy exports, contact lists, transaction sheets, and screenshot cleanups.
“We've found this tool to be a great fit for the kind of spreadsheet work we do at Lombard Toyota. It helps turn large, messy data exports into something much easier to read and work with, without requiring a lot of manual cleanup.
What we especially like is that it seems to understand the structure of dealership data instead of treating every column the same. That saves time and makes the finished spreadsheets much more useful for our day-to-day work.
Definitely a helpful tool for an automotive dealership working with a lot of data.”
Lombard Toyota
Google Workspace Marketplace™ Review, August 13, 2026
Most data cleaning tools are aimed at data engineers, pipelines, transformations, schema validation, code. That's overkill if you just need to take a messy export and hand it off to a teammate, a report, or another tool. Clean That Sheet™ is the version for everyone else: marketers, founders, ops, analysts, freelancers, students, and small business owners who deal with spreadsheets but don't want to learn a new framework to clean one.
We focus on the boring 90% of data cleaning that nobody enjoys doing manually. Removing duplicate rows, including near duplicates that look different because of whitespace or casing. Standardizing emails, names, and dates to a consistent format. Trimming stray spaces from every cell. Dropping empty rows. Tidying column headers so the file is filter friendly. None of it is glamorous, that's the point of automating it.
The workflow is intentionally short. Upload a .csv, .xlsx, or .xls file. See a free preview of the cleaned sample so you know what we changed. If it looks right, pay only to unlock the full cleaned file as a download in the same format. No account, no subscription, no minimum row count, no pretending to be more enterprise than it is.
It's great for prepping data before a report, cleaning an export before importing it somewhere else, getting a customer list ready for an email campaign, or just making a shared spreadsheet less embarrassing before you send the link. If you'd otherwise spend 20 minutes in Find & Replace, this is the upgrade.
Want cleaner files with less work?
Get occasional updates as Clean That Sheet™ adds more ways to fix messy spreadsheets.