Free CSV tools — for converting, cleaning, querying and visualizing.

Format conversion with smart type detection.

Most free CSV converters output everything as quoted strings. Ours infers types from your data — numbers stay numbers, booleans stay booleans, dates stay dates.

• CSV to JSON
• CSV to SQL (CREATE TABLE + INSERT)
• CSV to Excel (.xlsx)
• CSV to Markdown table
• CSV to HTML table
• CSV to XML
• JSON to CSV (flattens nested)
• Excel to CSV (.xlsx / .xls)

Tidy a messy CSV.

Find what's wrong, drop what's redundant, slice down to the rows that matter, split into manageable chunks.

• CSV Validator (find issues by severity)
• Remove duplicate rows
• Sort and filter (multi-filter with AND)
• Split CSV (by row count, file count, or column value)

Real SQL against your CSV.

SELECT, WHERE with AND/OR, ORDER BY, LIMIT — no database, no upload, no setup.

• Query CSV with SQL

Chain operations in one tab.

Validate → dedupe → filter → sort → SQL → split → export, all from one pipeline that re-runs as you change steps.

• CSV Pipeline / Workflow Builder

Build a dashboard from your CSV.

Once your data is shaped, the dashboard generates KPIs, charts, anomaly flags, and a sortable table — automatically.

• Dashboard Builder (the main tool)
• Example dashboards (6 sample datasets)
• How to build a CSV dashboard (guide)
• Sales dashboard from CSV
• Excel to dashboard

Common questions.

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  Are these CSV tools really free?

  Yes. No signup, no trial, no paid tier. The site is ad-supported.

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  Do I need to upload my CSV?

  No. The browser tools parse and process your file locally — you can verify in DevTools → Network that no requests fire when you drop a file.

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  How many tools are there?

  Currently around 15 — converters, cleaners, a SQL query tool, a workflow builder, and the dashboard builder. See the lists above by category.

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  Which file types work?

  CSV (comma, semicolon or tab), TSV, and Excel files (.xlsx and .xls). Multi-sheet workbooks show a picker.