/ free tools

Free CSV tools

Twelve fast utilities for everyday CSV work — convert, clean, split, merge, and validate. Every tool runs entirely in your browser: no upload, no signup, no limits.

100% free forever
Private — files never leave your device
Real CSV parser — quotes and commas handled

Converters

CSV to JSON
Turn CSV rows into a JSON array of objects.
JSON to CSV
Flatten a JSON array into spreadsheet-ready CSV.
CSV to Excel
Turn a CSV into a real .xlsx Excel workbook.
Excel to CSV
Extract clean CSV from any .xlsx or .xls workbook.
CSV to SQL
Generate CREATE TABLE + INSERT statements from CSV.
CSV to Markdown
Paste CSV, get a GitHub-ready Markdown table.
CSV to HTML
Generate clean, semantic HTML table markup from CSV.
Delimiter Converter
Swap commas, semicolons, tabs, and pipes — auto-detected.

Clean-up & utilities

Remove Duplicates
Dedupe by whole row or one key column (like email).
CSV Splitter
Break a big CSV into smaller chunks, header included.
CSV Merger
Combine many CSVs into one, keeping a single header.
CSV Validator
Lint a CSV for broken rows, quotes, and header issues.

Why these tools are free

OpenCSV is a $1-lifetime CSV editor built on one idea: working with CSVs should be fast and private. These tools share the same engine and the same principle — everything runs locally in your browser. If you like them, the full editor is one dollar, forever.

Need a full CSV editor?

Open, edit, and share CSVs in seconds. 14-day free trial, then $1 for lifetime access.

Try OpenCSV free