About CSVTool.io
CSVTool.io is a free, privacy-focused suite of online tools for working with CSV files. Whether you need to view, edit, convert, or manipulate CSV data, our tools help you get the job done quickly and securely.
100% Private
Your files never leave your browser. All processing happens locally on your device using JavaScript. We don't upload, store, or have access to your data.
No Upload Wait
No upload delays or server processing. Virtualized tables render only the visible rows; practical file size and processing time depend on your device and each tool.
No Account Required
Start using any tool immediately. No signup, no login, no email required. Just open the tool and get to work.
Works Everywhere
Use CSVTool.io on any modern browser - Chrome, Firefox, Safari, or Edge. Works on desktop, tablet, and mobile devices.
Our Tools
We offer a comprehensive suite of CSV tools including:
- CSV Viewer & Editor - View and edit CSV files with sorting, filtering, and search
- Format Converters - Convert between CSV, Excel, JSON, XML, SQL, and more
- Data Manipulation - Split, merge, filter, deduplicate, and transform your data
- Specialized Tools - Work with contacts (VCF), geographic data (KML, GeoJSON), and more
How It Works
CSVTool.io uses modern web technologies to process your files entirely within your browser:
- PapaParse - Fast and reliable CSV parsing
- SheetJS - Excel file reading and writing
- Virtual Scrolling - Render only the visible rows within each tool's input guard
- Web Workers - Keep viewer and validator parsing off the main browser thread
Contact
Have questions, feedback, or feature requests? We'd love to hear from you. Reach out to us at hello@csvtool.io.