Duplicate Finder
Identify repeated records in a CSV dataset so you can inspect duplicates before cleaning or importing the data. Decide whether a duplicate means an identical row or a repeated business key.
Open Duplicate Finder →No account required for basic use. Check the tool notes before using sensitive data.
What this tool helps you do
Keep a backup and define the matching rule before deleting rows. Two records with the same email, for example, may not be duplicates if other fields differ.
How to use Duplicate Finder
- Open the tool using the button above.
- Paste or enter a small representative sample in the input area.
- Run the tool and review the output for correctness.
- Copy or save the result only after checking important values and edge cases.
Example input
id,name 1,Ava 2,Noah 1,Ava
Tips and limitations
Use Table Comparator to understand how two dataset versions differ.
- Keep an unchanged copy of important source data.
- Generated or converted output should be reviewed before production use.
- Results may depend on input quality, browser capability, and the target format or database dialect.
Related tools
Frequently asked questions
Is Duplicate Finder free?
Yes. QueryCherry's basic tools are free to use without creating an account.
Can I trust the output without checking it?
No automated helper can replace review for important work. Validate the result against your intended format and test it with representative data.
Can I use sensitive or confidential data?
Review QueryCherry's Privacy Policy and the tool's data-handling notes first. For highly sensitive information, use a workflow approved by your organization.
Explore more free tools
QueryCherry offers focused utilities for common data tasks. Basic tools are available without an account.
Review outputs before using them in production. Tool behavior and practical file limits can depend on your browser, device, and input.