Dev tools · alternatives · 2026

24 alternatives to Convert JSON Schema to SQL DDL

While doing research for an architectural change at work, I couldn’t find a nice npm library that let’s you create SQL tables from a JSON Schema. That’s how I decided to create one myself.

Convert JSON Schema to SQL DDL is a developer tool that transforms JSON Schema definitions into SQL table creation statements. Designed for developers and database architects, it addresses the gap in available npm… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.

1. 1
   Json2graphql – From a JSON file to Postgres-backed realtime GraphQL▲120

   Blazing fast, instant realtime GraphQL APIs on all your data with fine grained access control, also trigger webhooks on database events. - graphql-engine/community/tools/json2graphql at master · hasura/graphql-engine

   2019 · github.com · its alternatives →

2. 2
   DDL to Data – Generate realistic test data from SQL schemas▲55

   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 →

3. 3
   Schema Sculpt▲14

   Transform JSON into database-ready schemas.

   2025 · schemasculpt.cloud · its alternatives →

4. 4
   A tool to Convert JSON schemas into TypeScript Deno classes▲43

   Hello all To preface this is just something I've been making as a learning exercise, so all feedback is appreciated. This is a tool that converts JSON schemas into TypeScript utility classes for use in Deno. Automatic Type Generation: Typescript interfaces for the compressed and uncompressed versions of your data. Compression & Decompression: Compress and decompress your data. Validation: Built-in data validation using Ajv ensures your data adheres to the schema. Reusability: Once generated, the utility classes can be used in other Deno projects. It currently only supports a subset of JSON…

   2023 · github.com · its alternatives →

5. 5
   Dbdot – Golang tool to help generate Postgres schema diagrams▲119

   Generate DOT description for postgres db schema. Contribute to akarki15/dbdot development by creating an account on GitHub.

   2019 · github.com · its alternatives →

6. 6
   JSONSchema to TypeScript compiler▲72

   Compile JSON Schema to TypeScript type declarations - bcherny/json-schema-to-typescript

   2017 · github.com · its alternatives →

7. 7
   Sqlify▲191

   JSON, CSV and SQL converter

   2017 · its alternatives →

8. 8
   jql – Easier jq Alternative with a Lispy Syntax Written in Go▲217

   Easy JSON Query Processor with a Lispy syntax in Go - cube2222/jql

   2020 · github.com · its alternatives →

9. 9
   Json To Xml (XSD) Schema Converter▲18

   Convert JSON to XML Schema (XSD) effortlessly

   2025 · its alternatives →

10. 10
    Querying JSON documents using SQL-like language in Scala▲70

    SQL micro-dialect implementation for querying JSON objects. Written purely in Scala. - mmalek06/JsonSql

    2020 · github.com · its alternatives →

11. 11DA
    DTL: a language and JavaScript lib to transform and manipulate data▲63

    DTL is a project that began it's life as part of a another piece of software for a startup I founded a few years ago. For that project I needed a way to describe how to rewrite data in a portable way. I needed to be able to create the rules on the fly and store them in a database, I needed them to be able to describe transformations I hadn't thought about, but also needed them to be safe and predictable. Though the startup didn't survive, the language I made was so useful to me I felt I had to extract it and make it usable to everyone. DTL is the result. Though the npm module is relatively…

    2022 · getdtl.org · its alternatives →

12. 12
    SQL Database Schema Generator▲133

    Generate a 100% free database schema for your project

    2024 · supalaunch.com · its alternatives →

13. 13
    Json2Html▲97

    App to convert JSON into human friendly tabular format.

    2015 · its alternatives →

14. 14
    MistQL, a mini-language for querying JSON-like structures▲55

    A query language for JSON-like structures

    2021 · mistql.com · its alternatives →

15. 15
    Verify JSON using minimal schema▲91

    verify-json. Contribute to yusufnb/verify-json development by creating an account on GitHub.

    2020 · github.com · its alternatives →

16. 16
    Generate JSON Schema from a JSON Object▲5

    🧞 Convert JSON Objects to MySQL, JSON Schema, Mongoose, Google BigQuery, Swagger, and more. - nijikokun/generate-schema

    2015 · github.com · its alternatives →

17. 17DS
    DBML – simple DSL language to document database schemas▲57

    2019 · dbml-lang.org · its alternatives →

18. 18
    TypeScript to GraphQL conversion tool with type inference▲90

    Build Typed GraphQL Queries in TypeScript without the code generation - acro5piano/typed-graphqlify

    2018 · github.com · its alternatives →

19. 19NM
    Npm module that makes easy to convert JSON to CSV▲64

    2017 · npmjs.com · its alternatives →

20. 20
    FSET▲93

    A JSON Schema editor, no more writing json schema by hand

    2021 · fset.app · its alternatives →

21. 21
    JSON to Mongoose Schema Converter▲9

    Convert, create, generate mongoDB, Mongoose Schema from json

    2025 · its alternatives →

22. 22AS
    A Schemaless Data Store Within Your SQL Database▲45

    Hi HN, we're Eric and Dean, creators of SchemafreeSQL. Its roots go back to an on-line Web App Development Environment we developed back in 1999. It was comprised of an IDE, Web Server, Object Store, Virtual File System, Template System, and polyglot (Java, JavaScript, and Python). Of course, we named it “.OS”. Then we ended up dropping it. But that's a story for another time. It was the ease of use of the Object Store from .OS that we really missed, which brings us back to SchemafreeSQL. It provides an enhanced API to your SQL Database which allows it to function as a Schemaless…

    2022 · schemafreesql.com · its alternatives →

23. 23
    Schema Cast▲3

    Generate JSON schemas from your code instantly

    Jul 2026 · schema-cast-web.vercel.app · its alternatives →

24. 24DT
    Daba – Turn your JSON into a database▲15

    Hi all, I built this tool when I needed a simple LocalStorage-esque database for a client project, and figured others might want something similar. Basically turns your JSON into a query-able, hosted database in seconds. You can read/update/delete JSON files by path, just like you would in Javascript. So, something like get(”users[7].address”) And while we’re at it, I also built a simple file storage service where you upload a file and it gives you the URL back. A lot of my (and other devs friends') side projects will never require more data than a JSON file can handle. Yet we…

    2023 · daba.so · its alternatives →

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 →