Free CSV tools — no signup, no upload required.

Honest about what we are.

We don't sell premium tiers or charge for the converters. Two ad slots on the page pay for hosting; everything else is free. That's the deal.

Every tool below — free, no signup.

• Validate mailing address formats and postal codes in a CSV
• Validate and format a CSV phone column to E.164 locally
• Validate the email addresses in a CSV and export clean and flagged lists
• Map and preflight an Outlook contacts CSV before a test import
• Map and preflight a Google Contacts CSV before a controlled import
• Preflight an ActiveCampaign contact CSV before a controlled import
• Preflight a Klaviyo profile CSV before a small list import
• Preflight a Mailchimp email-contact CSV before a small audience import
• Preflight a HubSpot contact CSV before a small quick import
• Preflight a WooCommerce core product CSV before a small test import
• Preflight a Shopify product CSV before a small test import
• Prepare CSV / Excel for Power BI with explicit types and M
• CSV / Excel coordinates to a private map
• CSV / Excel to iCalendar (ICS)
• CSV / Excel to vCard (VCF)
• CSV to JSON
• CSV to SQL
• CSV to Excel
• CSV to Markdown
• CSV to HTML table
• CSV to XML
• JSON to CSV
• Excel to CSV
• CSV Validator
• Remove duplicate rows
• Sort & filter CSV
• Split CSV
• Query CSV with SQL
• CSV Pipeline / Workflow Builder
• Dashboard Builder

Common questions.

• ·

  Are there any hidden paid features?

  No. There is no paid tier on the site. The roadmap may eventually include one for very specific power-user features, but the existing tools above are free.

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  Do I need to give an email address?

  No. There is no signup or login. There is no email field anywhere on the site.

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  Why is it ad-supported then?

  Two AdSense slots on most pages pay for the domain and hosting. We were honest about this rather than pretending the site runs on goodwill.

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  Can I block the ads?

  Yes — the tools work fully without them.