Clean. Convert.
Control.
Powerful CSV & Excel tools that run directly in your browser. Your files never leave your device.
| Name | Country | |
|---|---|---|
| John Doe | john@email.com | USA |
| John Doe | john@email.com | USA |
| Sarah Connor | sarah@email.com | UK |
| Alex Patel | alex@email.com | IN |
Private
Your files stay in your browser. Zero bytes transferred to external servers.
Instant
No waiting for server uploads or queues. Millisecond in-memory parsing.
Free
Core tools are completely free forever. No sign-up, no subscriptions.
Clean your CSV without uploading it.
Remove duplicates, detect empty values, normalize formatting and download a cleaned dataset — entirely inside your browser.
Watch it transform in real time.
Experience how DataForge repairs common real-world CSV errors in a single click.
| Name | Country | Phone |
|---|
| Name | Country | Phone |
|---|
Everything you need to work with data
Simple tools for the annoying parts of working with spreadsheets.
CSV Cleaner
Clean messy CSV files in seconds.
CSV Deduplicator
Find and remove duplicate rows.
CSV → JSON
Convert CSV data into clean JSON.
JSON → CSV
Turn JSON data into spreadsheet-ready CSV.
CSV → Excel
Convert CSV files into Excel format.
Excel → CSV
Convert Excel spreadsheets into CSV.
CSV Column Splitter
Split one column into multiple columns.
CSV Column Merger
Combine multiple columns into one.
CSV Validator
Find missing, malformed, and inconsistent data.
CSV Formatter
Clean formatting and normalize your dataset.
Find Missing Values
Identify incomplete rows and columns.
Data Preview
Quickly inspect large datasets before downloading.
JSON Formatter
Prettify, beautify, indent and minify JSON.
JSON Validator
Find syntax errors, validate structures, and inspect types.
Three steps. Zero uploads.
A modern client-first model engineered for speed and absolute confidentiality.
Drop your file
Drag any CSV or Excel spreadsheet straight into your browser window. Memory buffers load your data locally.
Process locally
High-performance JavaScript routines deduplicate, sanitize, convert, or validate in your machine's CPU threads.
Download the result
Export your cleaned dataset or converted spreadsheet immediately via instant in-memory Blob links.
Why DataForge
Designed for data engineers, analysts, developers, and security-minded teams.
Privacy First
Files are processed locally whenever possible. Your confidential customer records, financials, and API dumps stay on your machine.
Lightning Fast
No upload/download waiting for basic tools. Zero server round trips mean operations take milliseconds, not minutes.
Large File Friendly
Design the interface to handle reasonably large CSV files efficiently with memory-conscious streaming algorithms.
No Installation
Everything works directly in the browser. No complex Python scripts, command-line flags, or bloated spreadsheet suites required.
Simple
No complicated spreadsheet software required. One-click routines replace dozens of messy Excel formulas.
Works Everywhere
Desktop, tablet, and mobile responsive. Works reliably across modern versions of Chrome, Safari, Firefox, and Edge.