# minimaxir/big-list-of-naughty-strings

The Big List of Naughty Strings is a list of strings which have a high probability of causing issues when used as user-input data.

Repository: https://github.com/minimaxir/big-list-of-naughty-strings
Canonical: https://ross.abutalabs.com/products/big-list-of-naughty-strings
Language: Python
License: MIT
License Family: permissive
Last push: 2024-04-18T03:26:59+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 4043, "days_push": 867, "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 47712, forks 2153 (observed 2026-08-28T04:12:11.313713+00:00)

## What it is
A curated list of strings with a high probability of causing issues when used as user input, provided as newline-delimited text and JSON files. It is intended for automated and manual QA testing to expose string-handling and validation bugs.

## Use cases
- test form inputs with problematic strings
- fuzz user input handling with edge-case unicode
- find string validation bugs in my app
- generate adversarial test data for QA
- test how my API handles emoji and special characters

## When to choose
- you need a ready-made list of tricky input strings for QA or automated tests
- you want to check unicode, encoding, and injection edge cases in software you own

## When to avoid
- you need formal security or penetration testing rather than input edge-case checks
- you need a programmatic fuzzing tool rather than a static string list

## Facets
- artifact type: dataset
- maturity: maintenance
- function: testing, fuzzing, data-generation
- domain: testing, developer-tools, security
- platform: cross-platform
- tags: qa-testing, test-data, edge-cases, unicode, input-validation, naughty-strings

## Member repositories
- minimaxir/big-list-of-naughty-strings (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:12:11.313713+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 2026-08-29T16:20:52.147897+00:00, confidence not recorded.
  - readme: https://github.com/minimaxir/big-list-of-naughty-strings (fetched 2026-08-28T04:12:11.313713+00:00, sha cacc7abe6080)
  - registry_npm: https://registry.npmjs.org/big-list-of-naughty-strings (fetched 2026-08-29T07:42:16.043723+00:00, sha dff3afb7d15c)
- Data as of 2026-08-30T08:39:29.467469+00:00.