ofetch vs ky vs undici 2026

TL;DR

ofetch is the best choice when you want one fetch wrapper that feels good across browser, server, and framework runtimes like Nuxt or Nitro.

ky is the cleanest browser-first option when you want a tiny, elegant wrapper around fetch with retries and hooks. undici is the right answer when you care about Node.js throughput, connection pooling, or low-level HTTP control. In pure Node.js apps, that often means using built-in fetch first and dropping to undici APIs only when you outgrow the default abstraction.

Quick Comparison

Library	npm package	Weekly downloads	Latest	Bundlephobia min+gz	Best for	Biggest tradeoff
ofetch	ofetch	~6.7M/week	1.5.1	~3.8 KB	Universal apps that want interceptors, auto parsing, and one API across browser and server.	It is a wrapper convenience layer, not a low-level transport toolkit.
ky	ky	~5.7M/week	2.0.2	~7.0 KB	Browser-first apps that want a small, pleasant fetch abstraction with retries and hooks.	It is less compelling when most of your important HTTP work happens in Node rather than the browser.
undici	undici	~91.2M/week	8.1.0	~151.8 KB	Node.js services that need performance, pooling, streaming, or direct access to the HTTP client behind native fetch.	It is much lower level and much heavier than a simple wrapper when all you need is ergonomic fetch.

Why this matters in 2026

The old HTTP-client question used to be "Axios or fetch?" In 2026, that is too broad. fetch exists almost everywhere, so the real question is what extra layer you want on top of it.

That extra layer changes by runtime:

• Browser apps want retries, hooks, and a nicer API.
• Isomorphic apps want the same behavior on server and client.
• Node services want connection reuse, streaming, and transport control.

That is why these three libraries are worth comparing. They all sit near fetch, but they solve different problems. Teams get into trouble when they pick based on API aesthetics instead of runtime needs.

What actually changes the decision

• If you need one wrapper to work across browser and server, ofetch is usually the cleanest answer.
• If your code mostly runs in browsers, ky is more focused and pleasant than undici.
• If you need connection pooling, streaming, mock agents, or raw Node performance, undici is the only one here that is really built for that.
• If Node's built-in fetch is already enough, adding undici directly may be unnecessary.
• If you want automatic JSON handling and ergonomic defaults, ofetch has the best all-around DX.
• If bundle size matters in browser code, ofetch and ky are easy to justify while undici usually is not.

Package-by-package breakdown

ofetch

Package: ofetch | Weekly downloads: ~6.7M | Latest: 1.5.1 | Bundlephobia: ~3.8 KB min+gz

ofetch is the most balanced pick when you want a modern fetch wrapper without committing to a browser-only or Node-only worldview. That is why it keeps showing up in Nuxt, Nitro, and other full-stack JavaScript environments where requests happen in several runtimes.

Why teams like it:

• Very small shipped footprint
• Sensible defaults for JSON parsing and request handling
• Interceptors and configuration that stay easy to understand
• Good fit for SSR and universal apps

Where it is weaker:

• Not a transport-level performance tool
• Less specialized for browser-only UX than ky
• Less direct control than undici when you need to tune Node networking behavior

If your team keeps asking for "something like fetch, but nicer everywhere," ofetch is usually what they mean.

ky

Package: ky | Weekly downloads: ~5.7M | Latest: 2.0.2 | Bundlephobia: ~7.0 KB min+gz

ky is a browser-first fetch wrapper for teams that want excellent ergonomics with very little complexity. It feels polished because it stays close to fetch instead of trying to become an all-purpose HTTP platform.

Why teams pick it:

• Clean API and excellent readability
• Built-in retry and hooks story for frontend requests
• Small enough for browser bundles without much debate
• Strong fit for SPAs, dashboards, and client-heavy React apps

Where it is weaker:

• Less universal than ofetch for mixed server and client environments
• Not a serious substitute for undici when Node performance matters
• Best when the browser is the center of your request lifecycle

ky is often the nicest developer-experience choice, but only if its browser-first bias matches your app.

undici

Package: undici | Weekly downloads: ~91.2M | Latest: 8.1.0 | Bundlephobia: ~151.8 KB min+gz

undici is not best thought of as a fetch convenience library. It is the Node.js HTTP engine that powers native fetch, and that framing matters. You reach for it when request throughput, pooling, streaming, and lower-level transport behavior become important enough that a wrapper is not the right tool anymore.

Why teams use it directly:

• Excellent performance in Node.js services
• Connection pooling and client control
• Strong streaming support
• Mocking and testing primitives tied to the same transport stack as Node fetch

Where it is overkill:

• Browser code
• Simple client-side API calls
• Teams that only need nicer request ergonomics, not transport primitives

In many Node applications, the practical advice is still: start with built-in fetch, then use undici APIs when you need more control.

Which one should you choose?

• Choose ofetch if you want one clean HTTP layer for browser, server, and SSR code.
• Choose ky if your HTTP logic is mostly browser-side and you want the best lightweight wrapper experience.
• Choose undici if your important workloads run in Node.js and performance or connection control really matters.
• Choose ofetch for universal DX.
• Choose ky for frontend ergonomics.
• Choose undici for Node transport control.

Final recommendation

For most universal JavaScript apps, pick ofetch.

For browser-first React apps, ky is the most pleasant choice. For Node.js backends, prefer native fetch unless you specifically need undici's lower-level APIs. The important point is not which library is "best" in the abstract. It is choosing the one that matches where your requests actually run.

Related reading

got vs undici vs node-fetch 2026 · wretch vs ky vs ofetch 2026 · Compare ky vs ofetch