universal-middleware

Write middleware once, target Hono, Express, Cloudflare, and more!

One middleware, multiple adapters

Automatically generate compatible middlewares for popular servers, from a single codebase

Bundle your middlewares for Express, Hono, Fastify, Cloudflare, Vercel, h3, Elysia, Hattip, Webroute and srvx

Write middlewares following established web standards (WinterCG, WHATWG) to ensure consistency and future-proofing

Who is this for?

Library authors looking to create cross-platform middleware that works seamlessly across multiple web servers and cloud platforms
Framework developers who want to provide flexibility by allowing users to choose their preferred server runtime and deployment target