JSON Mock Generator — Tinker
← back
Tinker
JSON Mock Generator
Build schemas · generate realistic fake data · export in any format
Dev Tools
⟳ History
↑ Import
⌗ Share
Schema / Example JSON
Parse ↵
Templates
Fields
0
Clear
+
Generation Config
Records
Locale
English (en)
English US
English UK
French
German
Spanish
Portuguese BR
Italian
Japanese
Chinese CN
Korean
Arabic
Hindi
Russian
Seed (optional)
Root wrapper
Array [ ]
Object { data: [] }
Paginated
None (first record)
Null chance %
ID format
UUID v4
NanoID
Integer (1…)
MongoDB ObjectId
⚡ Generate
↻ Regenerate
JSON
CSV
NDJSON
SQL
TS Types
⎘ Copy
↓ Download
⊞ Pretty
⊟ Diff
✓ Validate
{ }
Add fields and hit Generate
Field options
Cancel
Apply
Generation History
✕
Clear all
© 2026, Tinker - tools · calculators · practice games