CSV or TSV data files
All toolsAccepted input Created output Tips and limitations
Data · ready
CSV Deduplicator
Remove duplicate CSV rows using all fields or selected matching columns.
Loading local tool…
No uploadsYour files stay on this device.
Local engineYour browser does the work.
Auto cleanupTemporary memory is released.
About this tool
Use csv deduplicator without uploading files
Remove duplicate CSV rows using all fields or selected matching columns. CSV Deduplicator runs in the current browser session, giving you a direct result without sending the source to a Filemazing processing server.
Processing takes place in your browser tab. Temporary working data is released when you leave or reload the page.
Three steps
- Choose or paste the structured input for CSV Deduplicator.
- Select the columns, keys, order, or transformation rules to apply.
- Review a sample of the transformed result before downloading it.
Useful for
Common deduplicate csv tasks
- Using deduplicate csv without an upload queue
- Cleaning private exports
- Preparing structured data imports
Practical details
What to know before you start
A transformed data file from CSV Deduplicator
- Keep an untouched source export so transformed rows can be audited.
- Inspect identifiers, dates, delimiters, and blank values before importing the result.
- Review the CSV Deduplicator result before using it in an important workflow.