MockJSON
Don't kill yourself trying to generate test data
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Paste your JSON template:
Configure Fields:
📚 Quick Reference Guide
🔢 Formulas - Create Incremental Patterns
Use formulas to create dynamic patterns. Combine regular text with special tokens to generate incrementing values:
{n}
1-based counter (1, 2, 3...)
USER-{n} → USER-1, USER-2, USER-3
{i}
0-based index (0, 1, 2...)
ID-{i} → ID-0, ID-1, ID-2
{n:0000}
Padded counter with leading zeros
{n:000} → 001, 002, 003
{i:00000}
Padded index with leading zeros
M{i:00000} → M00000, M00001, M00002
🎯 Your Example:
000000001{n}
This will produce: 0000000011, 0000000012, 0000000013 etc.
The zeros at the start are preserved, then {n} adds 1, 2, 3...
💡 Pro Tips:
•
ORDER-{n:0000} → ORDER-0001, ORDER-0002, ORDER-0003...•
v{n}.0 → v1.0, v2.0, v3.0...•
SKU{i:000}-2025 → SKU000-2025, SKU001-2025, SKU002-2025...⚡ Quick Presets - Random Data Generators
Quick Presets provide pre-built random data generators and custom cycling values:
Random Data
Generate realistic test data
Names, Emails, Phone Numbers, Text, UUIDs, Dates, Numbers, etc.
Auto-increment
Sequential numbers with custom start/step
Start: 100, Step: 5 → 100, 105, 110...
Custom List
Cycle through your own values
Enter one per line or comma-separated
🎯 Custom List Examples:
Status values:
Pending
Active
Complete
Product names:
Widget A
Widget B
Widget C
Priority levels:
Low
Medium
High
Critical
💡 Tip: The app will cycle through your list in order (record 1 gets item 1, record 2 gets item 2, etc.)
📊 Parsed Field Structure:
Generated Data: