nowfound

Dev tools · alternatives · 2026

24 alternatives to schema-tools – Build and Edit JSON Schemas

We built this in a day to help save some time internally and wanted to share as others might find it useful for managing structured output schemas. There’s a few other tools out there - but none had exactly what we needed! Key Features: 1. Two-Way Editing: Paste in an existing JSON schema and edit it within the UI 2. Data-Type Validations: add validations to fields 3. Local Storage & Version History: track your edits, don’t lose changes Link: https://schematools.herondata.io Source Code: https://github.com/heron-data/schema-tools

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. schema-tools – Build and Edit JSON Schemas launched in 2024; newer entries below may have overtaken it.

  1. 1
    FSET▲93

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

    2021 · fset.app · its alternatives →

  2. 2

    Effortless JSON Editing, Anywhere!

    2023 · chromewebstore.google.com · its alternatives →

  3. 3

    pg_jsonschema is a solution we're exploring to allow enforcing more structure on json and jsonb typed postgres columns. We initially wrote the extension as an excuse to play with pgx, the rust framework for writing postgres extensions. That let us lean on existing rust libs for validation (jsonschema), so the extension's implementation is only 10 lines of code :) https://github.com/supabase/pg_jsonschema/blob/fb7ab09bf6050... happy to answer any questions!

    2022 · github.com · its alternatives →

  4. 4

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

    2020 · github.com · its alternatives →

  5. 5

    After two years of improvement, I think it's time to share it with you all. Here’s a quick overview: - Common features include validation, formatting, minification, and more. - Visualize JSON in a graph or table view. - Structured comparison with fallback to text comparison. - Navigate though JSON using JSON pointer. - Supports jq. Would love to hear the community's questions, thoughts and comments!

    2024 · github.com · its alternatives →

  6. 6

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

    2017 · github.com · its alternatives →

  7. 7

    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 →

  8. 8

    Bulletproof your GraphQL API

    2019 · the-guild.dev · its alternatives →

  9. 9

    Turn any URL into a JSON Schema, Zod, or Pydantic model

    Jun 2026 · schema.tabstack.ai · its alternatives →

  10. 10

    Transform JSON into database-ready schemas.

    2025 · schemasculpt.cloud · its alternatives →

  11. 11
  12. 12

    Generate, validate, and parse React forms using Mongoose-inspired JSON schemas - SteveVitali/react-form-generator

    2015 · github.com · its alternatives →

  13. 13SO
  14. 14

    A one-stop-shop tool for JSON processing on Mac

    2022 · tickplant.com · its alternatives →

  15. 15

    JSON-LD TypeScript types for Schema.org vocabulary - google/schema-dts

    2019 · github.com · its alternatives →

  16. 16

    jsoncompat: json schema compatibility checker

    Apr 2026 · jsoncompat.com · its alternatives →

  17. 17

    Free json-ld & schema.org validator tool

    Nov 2025 · schemavalidator.com · its alternatives →

  18. 18

    Free, visual JSON editor - Validation, Type Support etc

    Nov 2025 · visualjsoneditor.com · its alternatives →

  19. 19

    Fix broken schema and unlock rich results

    May 2026 · jsonschemaapp.com · its alternatives →

  20. 20

    Let JSON play nicely with Typescript. Contribute to ostrowr/ts-json-validator development by creating an account on GitHub.

    2019 · github.com · its alternatives →

  21. 21

    Type-checked Schema.org JSON-LD for React. Contribute to google/react-schemaorg development by creating an account on GitHub.

    2019 · github.com · its alternatives →

  22. 22IM
  23. 23

    Stop editing raw JSON. Manage data through a structured UI.

    Jan 2026 · jsondata.net · its alternatives →

  24. 24

    Generate one JSON Schema from multiple samples

    Jun 2026 · jsondevtools.org · its alternatives →

Also compare

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 →