Developer Test Data Tools — UUID, JSON & SQL
Developer generators: UUID bulk, dummy JSON, SQL INSERT seeds, custom schema mock CSV/JSON/XML export free.
UUID, JSON, CSV, XML, SQL, JWT, API mock data, and Base64 utilities for development workflows. This category includes 11 free online tools on Fake Data Hub, including UUID Generator, Mock Data Generator, JSON Generator, SQL Dummy Data Generator, JWT Generator, Base64 Encode / Decode, and more. Each generator produces fictional data for QA, staging environments, and UI prototypes—never for fraud, spam, or impersonation. Select a tool below to generate sample output, read step-by-step instructions, and review frequently asked questions about safe test-data practices.
UUID generator—generate UUID, GUID, bulk v4 free.
Open toolMock & random data generator—SQL, sample rows, 1,000 export.
Open toolJSON random data—create dummy JSON user arrays for APIs.
Open toolDummy MySQL/Postgres data—INSERT scripts & database test seeds.
Open toolSample JWT-shaped tokens for auth UI demos only.
Open toolEncode or decode text in the browser—no upload.
Open toolFree online ai fake dataset generator for test data.
Open toolFree online ulid generator for test data.
Open toolFree online nano id generator for test data.
Open toolFree online fake mac address generator for test data.
Open toolIPv4 and IPv6 test addresses.
Open tool