CSV Random Row Sampler
Extract an unbiased random sample of N rows or a percentage from CSV datasets.
How It Works & Processing Standards
Extract an unbiased random sample of N rows or a percentage from CSV datasets.
Your input data is never sent to any server and is securely processed on your device.
Current Limits
- Desktop max file size: 50MB
- Mobile max file size: 20MB
CSV Random Row Sampler is a 100% free, browser-based online utility. All calculations and file conversions run locally inside your browser (Local-First) without sending data to remote servers, keeping your documents and inputs strictly private.
How to Use CSV Random Row Sampler
- 1Paste CSVInput your CSV data.
- 2Set Sample SizeSpecify exact row count (e.g. 100 rows) or percentage (e.g. 10%).
- 3Download SampleCopy or export the randomized subset.
Examples
Random 2-Row Sample
Input: id,name
1,Alice
2,Bob
3,Carol
4,Dave
Result: Sample (N=2):
id,name
2,Bob
4,Dave
Common Use Cases
- Creating small test fixtures from massive production database dumps
- Conducting statistical quality assurance audits on customer datasets
- Generating randomized training and validation splits for data modeling
Frequently Asked Questions (FAQ)
Is the sampling done without replacement?
Yes, sampling is performed without replacement so no row appears more than once in the output.