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CSV Column Extractor - keep selected fields from a CSV

Upload or paste CSV, keep only selected columns by name or index, and export a smaller privacy-safe file.

  • Runs locally
  • Category Format Converter
  • Best for Turning pasted content or local files into a handoff-friendly format.
Output
3 rows · 4 cols · 3 output lines

What this tool does

CSV Column Extractor helps you reduce a large export to only the fields needed for a task. Load a CSV, enter column names such as email, plan, revenue, or 1-based indexes such as 1,4,7, then copy or download the smaller result. It is useful before sharing data with vendors, building a sample fixture, preparing import templates, trimming analytics exports, or removing sensitive fields from ad hoc reports. The tool handles quoted fields and runs locally, so the source file does not leave the browser.

Tool details

Input
Files + Text + Numbers
The page exposes text boxes, numeric controls, file pickers, or structured inputs depending on the tool.
Output
Live result + Copy + Download
The result area focuses on usable output, with copy, download, or preview actions when supported.
Privacy
Browser-side processing
The main tool logic does not call an external API, so inputs normally stay in the current tab.
Save / share
Shareable URL state
Key settings are encoded in the URL so another person can reopen the same setup.
Performance budget
Initial JS <= 28 KB
No WASM budget is declared, keeping the tool quick to open on mobile.
Best fit
Format Converter · Operations
Category and role tags drive related tools, internal links, and quick fit checks.

How to use

  1. 1. Input

    Paste or drop your content into the tool panel.

  2. 2. Process

    Click the button. All processing is local in your browser.

  3. 3. Copy / Download

    Copy the result or download to disk in one click.

How CSV Column Extractor fits into your work

Use it when the main problem is getting content from one practical format into another.

Conversion jobs

  • Turning pasted content or local files into a handoff-friendly format.
  • Previewing a conversion before you use it in a larger workflow.
  • Cleaning small format mismatches without opening a full editor.

Conversion checks

  • Try a small sample first when the source format is messy.
  • Check character encoding, separators, and line endings after conversion.
  • Keep the source until the converted output has been reviewed.

Good next steps

These links move the current task into a more complete workflow.

  1. 1 CSV Deduplicator Remove duplicate CSV rows by full row or selected key columns from uploaded files, locally and safely. Open
  2. 2 CSV Filter Filter uploaded CSV rows by column value using contains, equals, or regex, with local browser processing. Open
  3. 3 CSV to Markdown Table Convert uploaded or pasted CSV into clean Markdown tables with quoted-cell support, locally in the browser. Open

Real-world use cases

  • Share a safe subset of a customer export

    Keep only approved columns before handing a CSV to a vendor, analyst, teammate, or test environment.

  • Build small fixtures from production-shaped data

    Extract just the fields a test or demo needs while leaving irrelevant and sensitive columns behind.

Common pitfalls

  • Header matching is exact aside from case; normalize headers first when names contain extra spaces or symbols.

  • Review the output before sharing because derived or note fields can still contain private data.

Privacy

Column extraction runs locally in the browser. The source file is not uploaded, but extracted outputs should still be reviewed before external sharing.

FAQ

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Made by Toolora · 100% client-side · Updated 2026-06-13