You need to clean up your messy sheet.
Duplicates, blank rows, weird dates, broken emails: your spreadsheet has seen enough. Upload it, preview the cleanup, and get the finished file in minutes.
Today's cleaned download is sponsored by DJMixHub, so there is no charge after your preview.
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 ~$.
Upload your spreadsheet to preview what CTS would clean.
Your original file stays unchanged.
On mobile, screenshots and CSVs work best. Larger Excel files are easier from desktop.
First, try Excel's built-in Remove Duplicates
Excel can remove exact duplicates. If your file still needs broader cleanup, preview what CTS would change below.
- 1
Select the table or range you want to check.
- 2
Go to Data → Remove Duplicates.
- 3
Choose which columns Excel should compare.
- 4
Confirm the removal. Save a backup first if you may need the original rows later.
Excel removes matching rows immediately. It does not give you the same review-first cleanup experience or check the rest of the file for other data issues.
Still have a messy file afterward?
Removing duplicates is only one part of cleaning spreadsheet data. Your file may still contain:
- Blank rows or cells
- Inconsistent dates and formatting
- Imported numbers stored as text
- Broken or inconsistently formatted email addresses
- Similar records that are not exact matches
- Changes that are difficult to review or document
Excel can remove exact duplicates. If your file still needs broader cleanup, preview what CTS would change below.
See the cleanup before you commit
Preview what CTS would clean, then download a cleaned copy.
- 1
Upload your spreadsheet
Excel, CSV, screenshots, and exports all work.
- 2
Preview what CTS would clean
See exact duplicates, possible matches, and what will be cleaned.
- 3
Download a cleaned copy
DJMixHub sponsored the download. Your original file stays unchanged.
Duplicate preview includes
- Exact duplicates
- Possible matches
- Rows kept or removed
Sample duplicate preview
See your sheet after it gets its life together.
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
How Clean That Sheet™ helps
Upload
Excel, CSV, exports, and screenshots.
Clean up
Duplicates, blank rows, spacing, dates, names, headers, formatting, and common import issues.
Best for
Files you need ready before you send, import, merge, or submit them. Not for building a spreadsheet from scratch or custom business analysis.
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.
Advice from Reddit or a chat tool can tell you which steps to try. Clean That Sheet™ shows you how those cleanup rules affect your actual file before you download a cleaned copy.
“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
Skip the Excel formula
Excel's duplicate check often misses rows when names, emails, casing, spaces, or formatting differ slightly. Manually removing them is also risky, because it is easy to delete the wrong row. Upload your file to preview duplicate rows and possible matches before you download a cleaned copy.
Got a list, sheet, or screenshot with duplicates?
Today's cleaned download is sponsored by DJMixHub, so there is no charge after your preview.
Today's cleaned download is sponsored by DJMixHub, so there is no charge after your preview.
Check My Messy Sheet — Free PreviewDrag & 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 Duplicate Cleanup
Your original file stays unchanged. No card required.
Need help with a different spreadsheet problem?
Clean That Sheet™ uses one upload-and-preview workflow for common spreadsheet rescue moments.
Fix a File Before You Import
Clean safe formatting issues, flag risks, and preview an import-ready file before you try again.
Fix Missing or Broken Formulas
Restore proven formula patterns from nearby rows without learning Excel formulas.
Cleaning a file for your books?
Preview spreadsheet cleanup before you hand data to your bookkeeper.
Frequently asked questions
- How do I remove duplicate rows in Excel?
- Upload an Excel or CSV file, review the duplicate preview, then choose whether to download the cleaned copy.
- Can I preview duplicate rows before deleting them?
- Yes. Review the proposed changes first. Your original file stays unchanged.
- Does this work with CSV files?
- Yes. CTS can preview duplicate rows and cleanup issues in CSV and Excel files.
- Do I pay before seeing the cleanup?
- No. Your preview is free. Download a cleaned copy after your preview.
- Where does the preview appear?
- The preview appears on screen after upload. No email is required.
- How fast is it?
- Most previews appear shortly after upload. Larger or more complex files may take longer.
- What file types work?
- Excel, CSV, screenshots, and PDFs are supported.
- Is my file private?
- Yes. Your file is only used to generate your preview and cleaned download. It is never shared or used for training. Please remove SSNs, passwords, and full account numbers before uploading.
- What if my file is too complex?
- Standard cleanups have a single download step. If your file needs custom work beyond the instant preview, we'll explain the next step before any work begins.
Still have a question? Email help@cleanthatsheet.com.
Built by an independent founder in Chicago to make spreadsheet cleanup faster for business owners, freelancers, and small teams.
Clean That Sheet™ is an Almeyda Holdings LLC project.