CSV Tools
Our CSV tools cover the full spectrum of spreadsheet data processing. Convert CSV to JSON, SQL, or Markdown; remove duplicates; split columns; validate email addresses; translate content with AI; and run bulk AI prompts — all without uploading files to any server.
Featured Tools
All CSV Tools10
CSV to JSON Converter
Convert CSV files or spreadsheet data to JSON format instantly in your browser.
JSON to CSV Converter
Convert JSON arrays to CSV format for use in Excel, Google Sheets, and data pipelines.
CSV to SQL Converter
Convert CSV data to SQL INSERT statements for MySQL, PostgreSQL, or SQLite.
CSV Email Validator
Validate email addresses in bulk from CSV files — identify invalid emails instantly.
CSV to Markdown Table
Convert CSV data to a Markdown table for documentation, READMEs, and wikis.
CSV Duplicate Remover
Remove duplicate rows from CSV files based on one or more columns.
CSV Translator
Translate CSV column content to another language using AI — batch translate data in seconds.
CSV Column Splitter
Split a single CSV column into multiple columns using a delimiter or pattern.
CSV Bulk Content Generator
Generate AI content for every row in a CSV — batch-generate descriptions, copy, and data.
CSV AI Prompt Runner
Run an AI prompt against every row in your CSV — data enrichment and analysis at scale.
Frequently Asked Questions
Can I convert CSV to JSON online for free?
Yes. The CSV to JSON tool converts any CSV file to a JSON array of objects instantly, with column headers automatically mapped to object keys.
Are my CSV files uploaded to a server?
No. All CSV processing happens directly in your browser. Your files are never uploaded to or stored on any server.
What CSV operations are supported?
OneDevTools supports CSV to JSON, JSON to CSV, CSV to SQL, CSV to Markdown, duplicate row removal, column splitting, email validation, AI translation, bulk content generation, and AI prompt running.
Can these tools handle large CSV files?
Yes. Since all processing runs in your browser, performance depends on your device. Most modern computers handle CSV files with hundreds of thousands of rows without issues.