Package

fastify-no-additional-properties

Add `additionalProperties: false` by default to your JSON Schemas

v3.0.1, 24 Jan 2025MITESM + CommonJSTypes: BundledSchema validation

$ npm install fastify-no-additional-properties

npm GitHub Homepage

Key numbers

As of 25 Sept 2026

Weekly downloads: 2.2k; +161% over 12 months
Gzip bundle size: -; No Bundlephobia data
Dependencies: 1; Direct, from package.json
Last release: 1 year ago; v3.0.1
GitHub stars: 19; 2 forks
Open issues / PRs: 0 / 0
Contributors: -
Commits, last 52 weeks: 0

Downloads

Last week 2026-09-15 to 2026-09-21

Weekly npm downloads, one point per week, weeks starting 23 Sept 2025 to 15 Sept 2026. The y axis starts at zero.

2,248 downloads last week, 8,289 in the last month. The 12-month change of +161% compares the average of the last 4 weeks with the first 4 weeks of the series.

Maintenance

Releases, last 12 months: -
Latest version: 3.0.1, 24 Jan 20251 year ago
First published: -
Last push to GitHub: 24 Jan 2025608 days before the snapshot
Repository archived: No
Open issues: 0
Open pull requests: 0
Commits, last 52 weeks: 0
Dependents on npm: 2

Major versions

Recent releases

Compatibility

Module format: ESM + CommonJSFrom package.json type, main and exports fields
TypeScript types: Bundled
Node.js engine range: Not declared
Runtimes: -
Unpacked size (npm): 10 kB
Dependencies (1): fastify-plugin

Install

npm install fastify-no-additional-properties

CDN

jsDelivrhttps://cdn.jsdelivr.net/npm/fastify-no-additional-properties@3.0.1/
unpkghttps://unpkg.com/fastify-no-additional-properties@3.0.1/
esm.shhttps://esm.sh/fastify-no-additional-properties@3.0.1

Alternatives

Package	Weekly downloads	Gzip	Last release	Module	Comparison
@fastify/response-validation A simple plugin that enables response validation for Fastify.	7.9k	-	1 month ago	CommonJS	-

Sources: npm registry, npm downloads API, GitHub API. Data fetched 25 Sept 2026.

Indexability: Not indexed (discovery only): downloads_week 2248 < 10000.