Dev tools · alternatives · 2026
24 alternatives to volder
Schema builder and data validation for javascript
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. volder launched in 2022; newer entries below may have overtaken it.
- 1
Hey HN! We’re Kevin and Steve. We’re building PromptTools (https://github.com/hegelai/prompttools): open-source, self-hostable tools for experimenting with, testing, and evaluating LLMs, vector databases, and prompts. Evaluating prompts, LLMs, and vector databases is a painful, time-consuming but necessary part of the product engineering process. Our tools allow engineers to do this in a lot less time. By “evaluating” we mean checking the quality of a model's response for a given use case, which is a combination of testing and benchmarking. As examples: - For generated…
2023 · github.com · its alternatives →
- 2
Boost SEO with One-Click Schema & Rich Results Testing
2023 · sproutseo.io · its alternatives →
- 3TA
TypeSchema is a JSON specification to describe data models in a programming language neutral format.
2024 · typeschema.org · its alternatives →
- 4
A full-featured schema.org rich cards validation tool
2020 · redirection.io · its alternatives →
- 5
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 →
- 6
2018 · npoint.io · its alternatives →
- 7
verify-json. Contribute to yusufnb/verify-json development by creating an account on GitHub.
2020 · github.com · its alternatives →
- 8
Free json-ld & schema.org validator tool
Nov 2025 · schemavalidator.com · its alternatives →
- 9
A simple, fast, extensible python library for data validation. - guyskk/validr
2016 · github.com · its alternatives →
- 10
OrchestraML▲82From English prompt to deployed ML model with human approval
Jun 2026 · orchestra-ml.vercel.app · its alternatives →
- 11
A JSON Object Validator and Sanitizer to check User-Input
2022 · github.com · its alternatives →
- 12
Traceformer.io is a web application that ingests KiCad projects or Altium netlists along with relevant datasheets, enabling LLM-based schematic review. The system is designed to identify datasheet-driven schematic issues that traditional ERC tools can't detect. Since our first launch (formerly as Netlist.io), we've made some big changes: - Full KiCad project parsing via an open-source plugin - Pass-through API pricing with a small platform fee - Automatic datasheet retrieval - ERC/DRC-style review UI - Revamped review workflow with selectable frontier models (GPT 5.2, Opus 4.5, and…
Jan 2026 · traceformer.io · its alternatives →
- 13
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 →
- 14
Flake schemas enable you to teach Nix about new flake output types.
2023 · determinate.systems · its alternatives →
- 15
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 →
- 16
Promptotype▲18Develop, test, and monitor your LLM structured tasks
2024 · promptotype.io · its alternatives →
- 17
Schema Markup Visualization Tool & Schema Generator Online
2024 · its alternatives →
- 18
Schema markup generator & validator
2024 · schemagenerator.dev · its alternatives →
- 19
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
2024 · schematools.herondata.io · its alternatives →
- 20
The most customizable validation framework for JavaScript. - soc221b/form-validation.js
2020 · github.com · its alternatives →
- 21
Let JSON play nicely with Typescript. Contribute to ostrowr/ts-json-validator development by creating an account on GitHub.
2019 · github.com · its alternatives →
- 22
Generate Schema for your webpages and Blogs to improve SERP
2023 · scalesleek.com · its alternatives →
- 23
Generate realistic mock JSON data with AI.
2025 · schema-ai-ten.vercel.app · its alternatives →
- 24
CSV Validation Tool and API (CSV Schema RI). Contribute to digital-preservation/csv-validator development by creating an account on GitHub.
2018 · github.com · its alternatives →
Also compare
- PromptTools – open-source tools for evaluating LLMs and vector DBs alternatives
- Schema Validator Browser Extension alternatives
- TypeSchema – A JSON specification to describe data models alternatives
- Structured data validator alternatives
- Pg_jsonschema – A Postgres extension for JSON validation alternatives
- JSON storage bins with schema validation 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 →