useprecisoDevTools

JSON Generator

Define your schema, pick field types, and generate realistic mock JSON instantly.

Presets:
Schema5 fields
Root type:
Count:items
Indent:
uuid-v4
Alice Smith
alice@gmail.com
42
Range:
true
Generated JSON

Define your schema on the left

Then click Generate to create mock JSON

All available types (35)

Basic

stringString
intInteger
floatFloat
booleanBoolean
nullNull
enumEnum

Identity

uuidUUID
nameFull Name
firstNameFirst Name
lastNameLast Name
usernameUsername
emailEmail
phonePhone
jobTitleJob Title
companyCompany

Internet

urlURL
ipv4IPv4
ipv6IPv6
userAgentUser Agent

Location

addressAddress
cityCity
countryCountry
zipCodeZip Code

Date & Time

dateDate
dateTimeDateTime
timestampTimestamp

Text

wordWord
sentenceSentence
paragraphParagraph

Misc

pricePrice
hexHex
colorColor
emojiEmoji

Nested

objectObject
arrayArray