CSV Row / JSON Generator
Generate random CSV rows or JSON lines for fixtures and tests — pick a format and row count. Seed mock data fast — local generation, free, no signup.
How to Use the CSV Row / JSON Generator
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Frequently Asked Questions
Nested objects?
No input conversion here — the tool creates fresh random rows, not conversions. CSV rows carry first name, last name, age, and status; JSON lines carry id, name, age, email, and active flag.
Arrays of objects?
JSON mode emits one object per line (JSON Lines). Wrap lines in brackets with commas to form an array by hand.
Back to JSON?
CSV mode outputs plain comma rows with no header line. Add headers yourself if the importer needs them.
Do generated rows upload?
No — conversion runs locally in your browser. Data never leaves your device.
What exactly is inside each generated row?
CSV rows carry first,last,age 20-69,status (Active/Inactive/Pending); JSON lines carry an 8-char id, name, age, lowercase email, and an active flag true about 70% of the time. The slider runs 1-50 rows; CSV mode has no header line.
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Last updated October 2026