# Level/levelup

Superseded by abstract-level. A wrapper for abstract-leveldown compliant stores, for Node.js and browsers.

Repository: https://github.com/Level/levelup
Canonical: https://ross.abutalabs.com/products/levelup
Language: JavaScript
License: MIT
License Family: permissive
Topics: leveldb, javascript, nodejs, browser, level
Archived: true
Last push: 2024-12-01T21:28:29+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 5133, "days_push": 640, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 4068, forks 266 (observed 2026-08-28T04:08:34.156654+00:00)

## What it is
levelup is a Node.js and browser wrapper providing a convenient API over abstract-leveldown compliant key-value stores, following LevelDB characteristics. It exposes get/put/delete/batch operations and streaming iterators, though it is now superseded by abstract-level.

## Use cases
- embed a key-value store in a Node.js application
- use LevelDB-style storage in the browser
- query a sorted key-value store with Node streams
- swap storage backends behind a common API
- batch writes to an embedded database

## When to choose
- maintaining legacy code already built on levelup or abstract-leveldown
- you need a fast embedded key-value store with a stream-based query interface

## When to avoid
- starting a new project - use abstract-level instead
- you need SQL, rich queries, or multi-node replication

## Facets
- artifact type: library
- maturity: maintenance
- function: database, database-driver, caching
- domain: databases, developer-tools, web-development
- platform: browser, cross-platform
- tags: leveldb, key-value-store, abstract-leveldown, streams, embedded-database, superseded, nodejs, javascript

## Member repositories
- Level/levelup (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:34.156654+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 2026-08-29T18:23:31.839816+00:00, confidence not recorded.
  - readme: https://github.com/Level/levelup (fetched 2026-08-28T04:08:34.156654+00:00, sha 9c6279492dfb)
  - registry_npm: https://registry.npmjs.org/levelup (fetched 2026-08-29T09:15:53.709238+00:00, sha 43ba7cedb75f)
- Data as of 2026-08-30T08:39:29.467469+00:00.