How to CSV to JSON
- 1Upload your large CSV file (even 1GB+)
- 2Our streaming engine reads it chunk by chunk
- 3Download the resulting JSON file instantly
Convert Large CSV to JSON - Unlimited File Size
Convert massive CSV files to JSON without crashing your browser. Streaming conversion for files 100MB+. Free, private, and unlimited.
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CSV to JSON
Convert CSV spreadsheets into JSON format for developers.
Upload your files
Drag & drop or click to browse
Max 1 file(s).csv
Why Use This Tool?
- ✓Unlimited File Size - We use browser streaming technology
- ✓No Server Uploads - Faster because data stays local
- ✓Crash-Proof - Won't freeze your computer like Excel
- ✓Developer Ready - Generates valid JSON arrays
- ✓Free Forever - No "Pro" plan needed for large files
Frequently Asked Questions
How big of a file can I convert?
Because we process data in streams, the limit is your hard drive space. We have successfully tested files over 2GB.
Will my browser crash?
No. Unlike other tools that load the whole file into RAM, we process it line-by-line, keeping memory usage low.
Is it faster than Python?
For simple conversions, yes! It runs instantly without needing to write scripts or install libraries.