Free utilities
Handy testing tools
A growing pond of free, local-only testing utilities. No AI, no tokens, no sign-up — just useful data to stress your next form, API, or feature.
Available tools
Each tool runs locally in your browser. Pick one and start generating test ammo.
Duck Data Generator
Generate emails, postcodes, boundary numbers, unicode strings, and dates with edge cases. Simple, complex, or completely ducky.
Generate data
TestSphere Card Picker
Draw a random TestSphere card for instant testing inspiration — quality aspects, heuristics, feelings, techniques and patterns.
Shuffle the deckAI Risk Deck: Discrimination & Toxicity
Draw a card of AI harms — biased data, toxic content, unequal performance — with sub-categories to test your AI features against.
Draw an AI cardAI Risk Deck: Privacy & Security
Draw a card of AI privacy and security harms — data leakage, prompt injection, jailbreaks, model theft — with sub-categories to attack your AI features with.
Draw an AI cardAI Risk Deck: Misinformation
Draw a card of AI misinformation harms — hallucination, fabricated sources, sycophancy, information pollution — to test what your AI confidently gets wrong.
Draw an AI card