# googleprojectzero/domato

DOM fuzzer

Repository: https://github.com/googleprojectzero/domato
Canonical: https://ross.abutalabs.com/products/domato
Homepage: https://googleprojectzero.blogspot.ch/2017/09/the-great-dom-fuzz-off-of-2017.html
Language: Python
License: Apache-2.0
License Family: permissive
Topics: fuzzing, security, dom
Last push: 2024-11-26T08:55:07+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 3268, "days_push": 645, "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 1785, forks 287 (observed 2026-08-28T04:05:36.080292+00:00)

## What it is
Domato is a grammar-based DOM fuzzer from Google Project Zero that generates HTML, CSS, and JavaScript test cases for finding browser DOM engine vulnerabilities. Its generation engine is reusable as a Python library for building other generation-based fuzzers with custom grammars.

## Use cases
- fuzz browser DOM engines for security bugs
- generate random HTML test cases for crash testing
- write custom grammars for generation-based fuzzing
- find SVG or CSS parsing vulnerabilities in browsers
- bulk-generate fuzz-*.html samples for browser test harnesses

## When to choose
- you are doing browser or DOM engine vulnerability research
- you want an extendible grammar-based fuzzer with a reusable generation engine
- you need to generate structured HTML/CSS/JS test cases at scale

## When to avoid
- you need coverage-guided mutation fuzzing of non-DOM targets
- you want a turnkey fuzzing harness with crash triage built in
- you are not comfortable running potentially malicious generated test cases in a browser

## Facets
- artifact type: cli-tool
- maturity: maintenance
- function: fuzzing, parser, security, developer-tools
- domain: security, web-development, developer-tools
- platform: python, cli, cross-platform
- tags: dom-fuzzing, grammar-based-fuzzing, browser-security, vulnerability-research, test-case-generation, browsers

## Member repositories
- googleprojectzero/domato (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:36.080292+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 2026-08-30T03:24:12.453645+00:00, confidence not recorded.
  - readme: https://github.com/googleprojectzero/domato (fetched 2026-08-28T04:05:36.080292+00:00, sha 6ea7853da524)
  - homepage: https://googleprojectzero.blogspot.ch/2017/09/the-great-dom-fuzz-off-of-2017.html (fetched 2026-08-29T11:02:38.339261+00:00, sha bbed7d120902)
  - site_page: https://projectzero.google/about-pz.html (fetched 2026-08-29T11:02:38.349005+00:00, sha 57bc2a3be387)
- Data as of 2026-08-30T08:39:29.467469+00:00.