Dev tools · alternatives · 2026
24 alternatives to DataConstruct – mock data generator and code generation
Hello HN, Today we're sharing with you DataConstruct, a tool to help you generate mock data and the code to consume it. Features: - Exporting data to json, yaml, xml - Generating PostgreSQL, MySQL scripts - Code gen for various languages including but not limited to C++, Rust, Typescript, Java, C#, Go, Dart, Swift, Mojo You can try it out at the link below (no signup or credit card needed), the only limit being up to 1000 rows per generation within the playground. https://www.dataconstruct.io/organizations/playground/schema... If there's languages, databases, data…
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. DataConstruct – mock data generator and code generation launched in 2024; newer entries below may have overtaken it.
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Generate custom data & API to build apps in less than 30s
2021 · retool.com · its alternatives →
- 3GJ
Easily create complex JSON data structures using intuitive templates.
2023 · jsongenerator.io · its alternatives →
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Built a tool for transforming unstructured data into structured outputs using language models (with 100% adherence). If you're facing problems getting GPT to adhere to a schema (JSON, XML, etc.) or regex, need to bulk process some unstructured data, or generate synthetic data, check it out. We run our own tuned model (you can self-host if you want), so, we're able to have incredibly fine grained control over text generation. Repository: https://github.com/automorphic-ai/trex Playground: https://automorphic.ai/playground
2023 · automorphic.ai · its alternatives →
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Mock Turtle▲72GUI approach to generating realistic mock JSON data
2022 · mockturtle.net · its alternatives →
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JSON Generator▲139Create mock and sample JSON using a powerful template syntax
2014 · json-generator.com · its alternatives →
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Serialization code generator for QUICK struct content comparison - CovenantSQL/HashStablePack
2019 · github.com · its alternatives →
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Structa▲116Generate production-ready database schemas from plain English. Export SQL, Prisma & ER diagrams instantly. Free to try, no credit card.
Nov 2025 · trystructa.com · its alternatives →
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Go (Golang) Fake Data Generator for Struct. [Notes]This repository is archived, moved to the new repository https://github.com/go-faker/faker - bxcodec/faker
2019 · github.com · its alternatives →
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I built DDL to Data after repeatedly pushing back on "just use production data and mask it" requests. Teams needed populated databases for testing, but pulling prod meant security reviews, PII scrubbing, and DevOps tickets. Hand-written seed scripts were the alternative slow, fragile, and out of sync the moment schemas changed. Paste your CREATE TABLE statements, get realistic test data back. It parses your schema, preserves foreign key relationships, and generates data that looks real, emails look like emails, timestamps are reasonable, uniqueness constraints are honored. No setup, no…
Jan 2026 · ddltodata.com · its alternatives →
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A Go SQL query builder and struct mapper. Contribute to samonzeweb/godb development by creating an account on GitHub.
2016 · github.com · its alternatives →
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2013 · databasetestdata.com · its alternatives →
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Paste real JSON, get 1,000 coherent rows that match it
Jun 2026 · jsondevtools.org · its alternatives →
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Generate Realistic Test Data — Instantly.
Nov 2025 · data-mock-generator.com · its alternatives →
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Pollux▲82Fake json data & json server mock API generator with JWT
2021 · mohammedal-rowad.github.io · its alternatives →
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Hey HN, I’m the author. I built Misata because existing tools (Faker, Mimesis) are great for random rows but terrible for relational or temporal integrity. I needed to generate data for a dashboard where "Timesheets" must happen after "Project Start Date," and I wanted to define these rules via natural language. How it works: LLM Layer: Uses Groq/Llama-3.3 to parse a "story" into a JSON schema constraint config. Simulation Layer: Uses Vectorized NumPy (no loops) to generate data. It builds a DAG of tables to ensure parent rows exist before child rows (referential integrity).…
Dec 2025 · github.com · its alternatives →
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Generate customized, realistic mock data & APIs, via GPT
2023 · its alternatives →
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dgw generates Golang struct, and simple Table/Row Data Gateway functions from PostgreSQL table metadata - kanmu/dgw
2016 · github.com · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →