# Level/level

Universal abstract-level database for Node.js and browsers.

Repository: https://github.com/Level/level
Canonical: https://ross.abutalabs.com/products/level
Language: JavaScript
License: MIT
License Family: permissive
Topics: leveldb, javascript, nodejs, level, electron, browsers, abstract-level
Last push: 2026-05-02T00:40:26+00:00

## Health v2 (maintenance only)
Score: 62/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 80, release rhythm 16, longevity 100
- inputs: {"age_days": 4854, "days_push": 124, "days_rel": 500, "gap_med": 140, "n_releases_24m": 2}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1674, forks 111 (observed 2026-08-28T04:05:20.403281+00:00)

## What it is
Level is a universal JavaScript key-value database library built on the abstract-level interface, exporting classic-level in Node.js and browser-level in browsers. It provides lexicographically sorted embedded storage with put/get/batch operations, iterators, sublevels, and TypeScript support.

## Use cases
- embed a sorted key-value store in a Node.js app
- store data locally in the browser with IndexedDB-backed storage
- persist JSON documents with typed keys and values
- iterate over ranges of keys in sorted order
- use the same database API across Node.js, Electron, and browsers
- create namespaced sublevel databases within one store

## When to choose
- you need an embedded, dependency-free key-value store in JavaScript
- you want one API that works in Node.js and browsers
- you need lexicographically sorted keys and range iterators
- you're building an Electron app needing local persistence

## When to avoid
- you need a client-server or networked database
- you need SQL, joins, or relational queries
- you need multi-process write concurrency at scale
- you need a distributed or replicated datastore

## Facets
- artifact type: library
- maturity: stable
- function: database, database-driver
- domain: databases, developer-tools, web-development
- platform: browser, cross-platform
- tags: key-value-store, leveldb, embedded-database, abstract-level, storage-engine, nodejs, electron

## Member repositories
- Level/level (main) score 62

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:20.403281+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:42:30.696138+00:00, confidence not recorded.
  - readme: https://github.com/Level/level (fetched 2026-08-28T04:05:20.403281+00:00, sha 653526e4050d)
  - registry_npm: https://registry.npmjs.org/level (fetched 2026-08-29T11:15:33.010629+00:00, sha 41def43140c0)
- Data as of 2026-08-30T08:39:29.467469+00:00.