Slim CSV and Deduplicate

Remove unwanted columns, deduplicate rows, then validate the final CSV.

Intermediate~3 mincsvcleanupoperations

Use case

Use this before sharing a CSV with external parties when you need to strip private or irrelevant columns and ensure no duplicate records are included.

Workflow overview3 steps0 / 3 completed~3 min

What to expect

Follow the steps from left to right for a quick overview, then use the inline stepper below to run each tool.

Remove unwanted columns, deduplicate rows, then validate the final CSV.

Current focusStep 1 · CSV Column Remover

0% complete

Step 1csv-tools Waiting

CSV Column Remover

CSV → CSV

Remove columns

CSV with the specified columns removed.

Step 2csv-tools Waiting

CSV Deduplicator

CSV → CSV

Deduplicate CSV

CSV with duplicate rows removed, keeping first occurrences.

Step 3csv-tools Waiting

CSV Validator

CSV → TEXT

Validate CSV

Status report with column count and any detected errors.

Workflow steps

Run this workflow inline

Work through each tool step here. Running a step automatically prepares the next step with the correct handoff value.

Workflow shortcut

Next unlocked step: Step 1 · CSV Column Remover

Progress is stored locally in this browser.

Step 1Ready to runcsv-tools

CSV Column Remover

Drop unwanted columns from a CSV. Specify which columns to remove and get a cleaned result.

Open full tool

Columns to remove

Comma-separated column names, for example: age,city

CSV input

Paste the CSV to trim and use the separate columns field above to pick columns to remove.

Trimmed CSV

CSV with the specified columns removed.

Run this step to process the current input and prepare the next workflow stage.

Step 2Lockedcsv-tools

CSV Deduplicator

Remove duplicate rows from a CSV, keeping the header and the first occurrence of each unique row.

Open full tool

Complete the previous step first

This step unlocks automatically after all earlier workflow steps are completed successfully.

CSV input

Paste CSV that may contain duplicate rows.

Deduplicated CSV

CSV with duplicate rows removed, keeping first occurrences.

Run this step to process the current input and prepare the next workflow stage.

Step 3Lockedcsv-tools

CSV Validator

Validate CSV syntax and structure — checks column consistency, unclosed quotes, and empty headers.

Open full tool

Complete the previous step first

This step unlocks automatically after all earlier workflow steps are completed successfully.

CSV input

Paste CSV to validate. The original CSV is passed to the next step on success.

Validation result

Status report with column count and any detected errors.

Run this step to process the current input and prepare the next workflow stage.