zod VS ajv

Compare zod vs ajv and see what are their differences.

zod

TypeScript-first schema validation with static type inference (by colinhacks)

ajv

The fastest JSON schema Validator. Supports JSON Schema draft-04/06/07/2019-09/2020-12 and JSON Type Definition (RFC8927) (by ajv-validator)
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zod ajv
303 60
31,418 13,510
- 0.9%
9.3 7.2
4 days ago 5 days ago
TypeScript TypeScript
MIT License MIT License
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.

zod

Posts with mentions or reviews of zod. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2024-06-24.
  • Valibot: featherweight validator
    2 projects | dev.to | 24 Jun 2024
    Today I want to talk about a tool that makes lightness its cornerstone. It's called Valibot. Valibot is an npm package for data validation. It works independently with JS and TypeScript and allows a wide variety of validations. In practical terms, as for the methods, it's essentially 1 to 1 with the most commonly used package for the same task, namely Zod.
  • Combining Node.js with Async Rust for remarkable performance
    5 projects | dev.to | 18 Jun 2024
    Encore.ts, as the name suggests, is designed from the ground up for TypeScript. But you can't actually run TypeScript: it first has to be compiled to JavaScript, by stripping all the type information. This means run-time type safety is much harder to achieve, which makes it difficult to do things like validating incoming requests, leading to solutions like Zod becoming popular for defining API schemas at runtime instead.
  • Valibot: A New Approach to Data Validation in JavaScript
    3 projects | dev.to | 16 Jun 2024
    Hiller had previously worked on modular forms, but he wanted to bring that same modular philosophy to data validation. While popular validation libraries like Zod offer excellent APIs, Hiller felt there was room to take modularity even further.
  • Type-Safe Env Vars in Remix - A modern approach with ArkType
    4 projects | dev.to | 14 Jun 2024
    Aside from updating Remix (from 1.7 to 2.9) and switching from Zod to ArkType, I’ve introduced a makeTypedEnvironment helper to streamline handling environment variables in both server and client environments. Additionally, I’ve optimized the codebase by removing the typedPick method and refining imports to ensure server code doesn’t leak into the client bundle.
  • NEXT JS STARTER PACK
    3 projects | dev.to | 13 Jun 2024
    React hook form Zod @hookform/resolvers
  • Simple AI Smart Home Manager
    3 projects | dev.to | 12 Jun 2024
    For the language models, Genkit provides the concept of Flows. A flow basically combines a prompt with a set of "tools" or actions that the llm can take. Like other frameworks in this space ZOD is used to provide schema information for both the input and output of flows and actions.
  • Using Arktype in Place of Zod - How to Adapt Parsers
    4 projects | dev.to | 12 Jun 2024
    Ever since I started using Zod, a TypeScript-first schema declaration and validation library, I've been a big fan and started using it in all my projects. Zod allows you to ensure the safety of your data at runtime, extending TypeScript’s type-checking capabilities beyond compile-time. Whenever I need to validate data from an outside source, such as an API, FormData, or URL, Zod has been my go-to tool.
  • 10 must known JS/TS open-source packages
    6 projects | dev.to | 11 Jun 2024
    Zod TypeScript-first schema validation with static type inference
  • This week trending news in tech
    1 project | dev.to | 6 Jun 2024
    Zod
  • Creating GPT Actions with ValTown
    3 projects | dev.to | 25 May 2024
    To define the action's inputs and outputs we will need the zod library. Zod is an npm package and ValTown lets us import it directly into our Vals:

ajv

Posts with mentions or reviews of ajv. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2024-04-07.
  • Popular Libraries For Building Type-safe Web Application APIs
    6 projects | dev.to | 7 Apr 2024
    Ajv’s documentation is available here.
  • 6 Reasons why JSON Schema is worth your time
    5 projects | dev.to | 3 Oct 2023
    In the JavaScript ecosystem you can use the excellent AJV package to validate any JavaScript object against a JSON schema. This is especially useful to ensure that API contracts are maintained when communicating with other services.
  • Migrate Your Express Application to Fastify
    12 projects | dev.to | 5 Jul 2023
    Since Fastify supports schema validation with Ajv, the validate module is no longer required on the /shorten route, and we can specify the JSON schema directly on the route. The controllers for both routes will largely remain the same, except that the res parameter is renamed to reply as before:
  • Has anybody used Typia library?
    3 projects | /r/typescript | 27 Jun 2023
    There's a ton of schema validators out there and most devs have their personal favorite. Mine was zod and is now typebox + ajv.
  • Accept only specific keys in JSON or form-data format in express?
    1 project | /r/node | 16 Jun 2023
    Good validator library: https://www.npmjs.com/package/ajv
  • Advanced Fastify: Hooks, Middleware, and Decorators
    4 projects | dev.to | 31 May 2023
    Fastify uses JSON schema to define the validation rules for each route's input payload, which includes the request body, query string, parameters, and headers. The JSON schema is a standard format for defining the structure and constraints of JSON data, and Fastify uses Ajv, one of the fastest and most efficient JSON schema validators available.
  • Getting Started with Fastify for Node.js
    4 projects | dev.to | 5 May 2023
    In Fastify, JSON schema validation is a built-in feature that allows you to validate the payload of incoming requests before the handler function is executed. This ensures that incoming data is in the expected format and meets the required criteria for your business logic. Fastify's JSON schema validation is powered by the Ajv library, a fast and efficient JSON schema validator.
  • How can we map data from JSON to typescript object efficiently?
    4 projects | /r/reactjs | 30 Apr 2023
    I think you're looking for a json schema validator like Ajv or Zod.
  • 5 useful JSON tools to improve your productivity
    4 projects | dev.to | 11 Apr 2023
    We can use JSON Schema to validate that our data adheres to a specific structure. Ajv is one popular validator tool for JavaScript applications that allows us to create a schema and then validate JSON against that schema. Here's an example of using Ajv to validate one of the above JSON examples against a schema:
  • Ask HN: JSON API object type definitions and validation in 2023?
    2 projects | news.ycombinator.com | 23 Mar 2023
    Hey HN,

    We're designing a new system and have been kicking the can about JSON object definitions and validation. Soon we need to settle on a system to validate API request bodies and provide helpful error messages.

    In the past, I've used JSON Schema ( https://json-schema.org/ ) to define definitions and ajv ( https://ajv.js.org/ ) to validate, but it's a bit verbose and ajv validation errors are more cryptic than I'd like to deal with.

    TypeSchema looks interesting. It seems solid (and perhaps stable?), but development hasn't been active for 2 years. It also looks like we'd still need to generate JSON Schema and choose a validation library

    Anyway, I'm very curious how others are approaching this problem. How do you organize and generate validations for your type definitions? What libraries do you use to validate and provide human readable error messages?

    Thank you!

What are some alternatives?

When comparing zod and ajv you can also consider the following projects:

class-validator - Decorator-based property validation for classes.

joi - The most powerful data validation library for JS [Moved to: https://github.com/hapijs/joi]

joi - The most powerful data validation library for JS [Moved to: https://github.com/sideway/joi]

Yup - Dead simple Object schema validation

typebox - Json Schema Type Builder with Static Type Resolution for TypeScript

tv4 - Tiny Validator for JSON Schema v4

io-ts - Runtime type system for IO decoding/encoding

Superstruct - A simple and composable way to validate data in JavaScript (and TypeScript).

SurveyJS - Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App
With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
surveyjs.io
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InfluxDB - Power Real-Time Data Analytics at Scale
Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
www.influxdata.com
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