The goal is the import, report, or handoff. The duplicate rows are just in the way.
Preview the repeats before they skew totals, break the import, or confuse the next person. Keep the original and move forward with the cleaned copy.
Checking today’s sponsored cleanup availability…
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 the file that needs to make it to the next step.
Your original file stays unchanged.
On mobile, screenshots and CSVs work best. Larger Excel files are easier from desktop.
Fastest safe option
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 people with something to finish, not a spreadsheet to babysit.
Analysts, bookkeepers, admins, operators, founders, and finance teams use CTS to get files ready for the send, import, merge, report, submission, or handoff that actually matters.
- Analysts
- Bookkeepers
- Admins
- Operators
- Founders
- Finance teams
- Spreadsheet-heavy workflows
The spreadsheet is the obstacle. Your next step is the point.
Bring the file
Excel, CSV, exports, and screenshots.
See what is in the way
Duplicates, blank rows, spacing, dates, names, headers, formatting, and common import issues.
Keep moving
Use the cleaned copy for the send, import, merge, report, submission, or handoff. CTS handles cleanup, not custom business analysis.
The spreadsheet is one step. Your goal is what comes next.
A finished report, successful import, clean handoff, or client-ready file is the point. Clean That Sheet™ helps with the repeatable cleanup step so you can get there without making spreadsheet repair your whole afternoon.
- Step 1
Bring the file that is in the way
Drop in a spreadsheet, CSV, screenshot, or PDF.
- Step 2
See what needs attention
Preview what CTS would clean before you commit.
- Step 3
Keep the work moving
Get a cleaned copy for whatever needs to happen next.
The cleanup is one step, not the whole job
Preview the actual file, understand the changes, and keep moving.
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 past the cleanup step and back to the import, report, submission, or handoff.
Advice from Reddit or a chat tool can suggest steps. CTS shows how those rules affect your actual file so you can decide whether the result gets you where you need to go.
“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: remove duplicates from Excel or CSV safely
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.
Need this file to move forward without the repeats?
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 ~$.
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 duplicates in Excel without formulas?
- Upload the Excel file, review the duplicate preview, and download a cleaned copy if the proposed changes look right. No helper column or dedupe formula is required.
- Can I preview duplicate rows before deleting them?
- Yes. Review the proposed changes first. Your original file stays unchanged.
- Can I remove duplicates from a CSV online?
- Yes. Upload a CSV to preview duplicate rows and related cleanup issues before downloading a cleaned copy.
- 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.