ufo

npmv1.6.4TypeScript

URL utils for humans

Safe to adopt

Yes — ufo scores well across adoption, maintenance, weight, supply chain, and licensing. 43.6M downloads per week and 5 known dependents. Last published 133 days ago. 5 releases in the last 2 years.

AAdoption: grade A, Excellent.
43.6M downloads per week and 5 known dependents.
BMaintenance: grade B, Good.
Last published 133 days ago. 5 releases in the last 2 years.
AWeight: grade A, Excellent.
Zero runtime dependencies, about 110 KB installed.
BSupply chain: grade B, Good.
This package has a single maintainer (bus factor of 1).
ALicense: grade A, Excellent.
MIT — permissive, with no copyleft found in the dependency tree.

Grades are computed deterministically from registry metadata collected by PackageGraph — downloads, dependents, publish dates, the resolved dependency tree, maintainer count, and declared licenses. No third-party scores are used.

Install cost

What you actually take on by adding ufo to a project.

Direct dependencies

Runtime packages this one declares itself.

Total installed

Distinct packages in the full runtime tree, deduplicated the way a package manager would.

110 KB

Install size

Unpacked size of this package plus its entire runtime tree.

—

Tree depth

Longest resolved dependency chain below this package.

Compatibility

Node.js: No constraint declared
Module format: ESM + CommonJS
TypeScript: Types included
Install scripts: None

Quick start

A usage example from the ufo README.

jsFull README ↗

// ESM
import { normalizeURL, joinURL } from "ufo";

// CommonJS
const { normalizeURL, joinURL } = require("ufo");

// Deno
import { parseURL } from "https://unpkg.com/ufo/dist/index.mjs";

Dependencies

Declared by ufo v1.6.4. Runtime dependencies are installed with the package; dev dependencies are not.

Dev (12)

@types/node ^25.6.0 @vitest/coverage-v8 ^4.1.5automd ^0.4.3changelogen ^0.6.2eslint ^10.2.1eslint-config-unjs ^0.6.2jiti ^2.6.1 prettier ^3.8.3typescript ^6.0.3unbuild ^3.6.1untyped ^2.0.0vitest ^4.1.5

Used by

Popular packages that depend on ufo.

vitenpm

Native-ESM powered web dev build tool

↓ 158.6M/wk◈ 26 dependents⚖ MIT

mllynpm

Missing ECMAScript module utils for Node.js

↓ 25.1M/wk◈ 7 dependents⚖ MITTS

@devframes/hubnpm

Hub layer that orchestrates devframe docks, terminals, messages, and commands on any host.

↓ 0/wk◈ 7 dependents⚖ MITTS

devframenpm

Framework for building one portable devtool integration that runs in any viewer.

↓ 0/wk◈ 14 dependents⚖ MITTS

nypmnpm

Unified Package Manager for Node.js

↓ 0/wk◈ 3 dependents⚖ MITTS

Relationship graph

Dependencies (left) and dependents (right) of ufo.

ufo dependencies dependents

Frequently installed together

cacnpm

Simple yet powerful framework for building command-line apps.

↓ 44M/wk◈ 9 dependents⚖ MIT

pathenpm

Universal filesystem path utils

↓ 0/wk◈ 25 dependents⚖ MITTS

mllynpm

Missing ECMAScript module utils for Node.js

↓ 25.1M/wk◈ 7 dependents⚖ MITTS

h3npm

Minimal H(TTP) framework built for high performance and portability.

↓ 34.2M/wk◈ 8 dependents⚖ MITTS

valibotnpm

The modular and type safe schema library for validating structural data

↓ 16.8M/wk◈ 5 dependents⚖ MITTS

get-port-pleasenpm

Get an available TCP port to listen

↓ 0/wk◈ 10 dependents⚖ MITTS

perfect-debouncenpm

↓ 0/wk◈ 3 dependents⚖ MITTS

@modelcontextprotocol/clientnpm

Model Context Protocol implementation for TypeScript - Client package

↓ 0/wk◈ 2 dependents⚖ MITTS

@standard-schema/specnpm

A family of specs for interoperable TypeScript

↓ 99.1M/wk◈ 9 dependents⚖ MITTS

@modelcontextprotocol/servernpm

Model Context Protocol implementation for TypeScript - Server package

↓ 0/wk◈ 1 dependents⚖ MITTS

obugnpm

A lightweight JavaScript debugging utility, forked from debug, featuring TypeScript and ESM support.

↓ 61.1M/wk◈ 8 dependents⚖ MITTS

mrmimenpm

A tiny (2.8kB) and fast utility for getting a MIME type from an extension or filename

↓ 37.2M/wk◈ 3 dependents⚖ MITTS

Release history

5 releases in the last two years, typically about 38 days apart.

Recent versions of ufo
Version	Published	Size	License
1.6.4latest	4 months ago	110 KB	MIT
1.6.3	7 months ago	110 KB	MIT
1.6.2	8 months ago	109 KB	MIT
1.6.1	1 year ago	102 KB	MIT
1.6.0	1 year ago	103 KB	MIT
1.5.4	2 years ago	101 KB	MIT
1.5.3	2 years ago	101 KB	MIT
1.5.2	2 years ago	100 KB	MIT
1.5.1	2 years ago	100 KB	MIT
1.5.0	2 years ago	100 KB	MIT
1.4.0	2 years ago	95 KB	MIT
1.3.2	2 years ago	65 KB	MIT
1.3.1	2 years ago	64 KB	MIT
1.3.0	3 years ago	47 KB	MIT
1.2.0	3 years ago	46 KB	MIT

Overview

ufo is an npm package that uRL utils for humans. It is extremely widely used, with about 43.6M downloads per week and 5 known dependents in the graph. The latest version is 1.6.4, released under the MIT license.

Who should use it

Teams working in the npm ecosystem who need uRL utils for humans and value a battle-tested, widely-adopted solution.

When not to use it

Consider an alternative if you need to or if a more actively-maintained option better fits your npm stack.

Pros

Large, well-established user base (43.6M weekly downloads).
Ships TypeScript type definitions.
Clear open-source license (MIT).

Cons

No significant drawbacks detected from available metadata.

Auto-generated from collected registry metadata. No external claims are inferred.

Maintainers

pi0

Frequently asked questions

Should I use ufo?

How do I install ufo?

Run `npm install ufo` to add ufo to your npm project.

What license is ufo released under?

ufo is distributed under the MIT license.

How popular is ufo?

ufo has approximately 43,577,011 downloads per week and 5 known dependent packages.

Is ufo still maintained?

The most recent release of ufo (v1.6.4) was published 4 months ago.

Does ufo run install scripts?

No. ufo does not define preinstall, install, or postinstall scripts, so installing it does not execute publisher-supplied code.