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miniflare

Fun, full-featured, fully-local simulator for Cloudflare Workers

v5.20260923.0-alpha, 24 Sept 2026MITCommonJSTypes: BundledCloud SDKs
$ npm install miniflare
npmGitHubHomepage

Key numbers

As of 25 Sept 2026
Weekly downloads
17.2m
+756% over 12 months
Gzip bundle size
-
No Bundlephobia data
Dependencies
6
Direct, from package.json
Last release
today
v5.20260923.0-alpha
GitHub stars
4.6k
1.5k forks
Open issues / PRs
303 / 211
Contributors
-
Commits, last 52 weeks
2,548

Downloads

Last week 2026-09-15 to 2026-09-21
010m20m30mSept 2025Mar 2026Sept 2026High 22.7m (12 May 2026)Low 1.9m (23 Dec 2025)
Weekly npm downloads, one point per week, weeks starting 23 Sept 2025 to 15 Sept 2026. The y axis starts at zero.

17,226,635 downloads last week, 77,927,849 in the last month. The 12-month change of +756% compares the average of the last 4 weeks with the first 4 weeks of the series.

Maintenance

Releases, last 12 months
89300 in total
Latest version
5.20260923.0-alpha, 24 Sept 2026today
First published
20 May 2021
Last push to GitHub
25 Sept 2026same day as the snapshot
Repository archived
No
Open issues
303
Open pull requests
211
Commits, last 52 weeks
2,548
Dependents on npm
125

Major versions

  1. v4 first release 4.20250310.0, 13 Mar 2025
  2. v3 first release 3.0.0, 17 May 2023
  3. v2 first release 2.0.0, 7 Jan 2022
  4. v1 first release 1.0.0, 2 Jul 2021
  5. v0 first release 0.1.0, 20 May 2021

Recent releases

VersionPublished
4.20260730.030 Jul 2026
4.20260722.128 Jul 2026
4.20260722.023 Jul 2026
4.20260721.021 Jul 2026
4.20260714.017 Jul 2026
4.20260710.015 Jul 2026
4.20260708.19 Jul 2026
4.20260708.09 Jul 2026
4.20260706.07 Jul 2026
4.20260702.07 Jul 2026
4.20260701.02 Jul 2026
4.20260630.030 Jun 2026
4.20260625.025 Jun 2026
4.20260623.023 Jun 2026

Compatibility

Module format
CommonJSFrom package.json type, main and exports fields
TypeScript types
Bundled
Node.js engine range
>=22.0.0
Runtimes
-
Unpacked size (npm)
22.7 MB
Dependencies (6)
wssharpyouchundiciworkerd@cspotcode/source-map-support

Install

npm install miniflare

CDN

  • jsDelivrhttps://cdn.jsdelivr.net/npm/miniflare@5.20260923.0-alpha/
  • unpkghttps://unpkg.com/miniflare@5.20260923.0-alpha/
  • esm.shhttps://esm.sh/miniflare@5.20260923.0-alpha

Alternatives

PackageWeekly downloadsGzipLast releaseModuleComparison
itty-router254.1k-3 months agoESM + CommonJS-
@neondatabase/serverless2.8m-5 months agoESM + CommonJS-
Sources: npm registry, npm downloads API, GitHub API. Data fetched 25 Sept 2026.

Indexability: Indexed.