Free Online Dev Helpers
Generate fixtures, docs and model classes in one click — generation runs locally in your browser; domain lookups are relayed via this site to public data.
Mock Data Generator
Build custom fields and export JSON / CSV test data, generated locally
Open tool →API Doc Generator
Paste a JSON response and get a recursive field table, copyable as Markdown / HTML
Open tool →SQL to Model
Turn CREATE TABLE into TypeScript / Java / Swift / Kotlin classes with SQL-typed comments
Open tool →JSON to Model
Infer field types from JSON and emit TypeScript / Java / Swift / Kotlin classes
Open tool →XML to Model
Map XML onto model classes, repeated elements become arrays, in four languages
Open tool →Domain Lookup
Query A / AAAA / MX / NS records and RDAP registration info in parallel
Open tool →Why these dev helpers?
Instant fixtures
Combine ten field types — names, emails, IPv4, UUID and more — then export 1-100 rows as JSON or CSV. No more hand-written fake data.
Models without typing
Paste SQL, JSON or XML and get TypeScript / Java / Swift / Kotlin classes with original types in comments; nested structures split into classes automatically.
Local first
All generation and parsing happen in your browser — sample payloads and schemas never leave your device. Only domain lookups are relayed through our server to public data.