# webmproject/libwebp

Mirror only. Please do not send pull requests. See https://chromium.googlesource.com/webm/libwebp/+/HEAD/CONTRIBUTING.md.

Repository: https://github.com/webmproject/libwebp
Canonical: https://ross.abutalabs.com/products/libwebp
Language: C
License: BSD-3-Clause
License Family: permissive
Last push: 2026-08-25T09:23:48+00:00

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 35, longevity 100
- inputs: {"age_days": 4390, "days_push": 8, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2380, forks 618 (observed 2026-08-28T04:06:42.268605+00:00)

## What it is
libwebp is the reference C library for encoding and decoding images in the WebP format, maintained by the WebM project. It also ships command-line tools such as cwebp and dwebp for compressing and decompressing images.

## Use cases
- add WebP encoding support to an application
- convert PNG or JPEG images to WebP from the command line
- decode WebP images in a C or C++ program
- compress images for faster web page loading
- handle animated WebP files
- inspect WebP image metadata and info

## When to choose
- you need fast, well-supported WebP encode/decode in native code
- you want the canonical implementation of the WebP format
- you need simple CLI tools for batch image conversion

## When to avoid
- you need a general-purpose image library supporting many formats
- you want a high-level API in a language other than C without bindings
- you only need to display images rather than encode/decode them

## Facets
- artifact type: library
- maturity: stable
- function: image-processing, compression, cli
- domain: image-processing, graphics, web-development, files
- platform: cross-platform, cli, c
- tags: webp, codec, encoder, decoder, image-format

## Member repositories
- webmproject/libwebp (main) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:42.268605+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 2026-08-30T02:34:52.570343+00:00, confidence not recorded.
  - readme: https://github.com/webmproject/libwebp (fetched 2026-08-28T04:06:42.268605+00:00, sha 600430fa713b)
- Data as of 2026-08-30T08:39:29.467469+00:00.