Online Tool Store
Recipe Allergen Checker
Scan a recipe's ingredients for the major allergen groups and flag hidden sources, as a preparation step before cooking for guests.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Education
Recipe Allergen Checker
Frontend preview — no upload or external service.
Allergen findings
4 flags: soy sauce contains soy and usually wheat; sesame oil is sesame; flour is gluten; stock cubes commonly contain celery and milk derivatives.
How the Recipe Allergen Checker works
- Paste the full ingredient list, including sauces, stocks, and anything pre-made.
- Read the hidden sources as well as the obvious ones — the flags on prepared ingredients are the ones people miss.
- Verify against the actual packaging you are using, since formulations differ between brands and change over time.
FAQ
Can this be relied on for someone with a serious allergy?
No. It works from ingredient names, not from the specific products in your kitchen. For anyone with an anaphylactic allergy, read every package label and check for may-contain warnings — the packaging is the only authority.
Which hidden sources catch people out most?
Wheat in soy sauce, celery and milk derivatives in stock cubes, and nuts or sesame in oils and spice blends. All of them look like single-ingredient items and are not.
What about cross-contamination?
This checks ingredients, not preparation. Shared utensils, fryers, and boards matter enormously for serious allergies and cannot be assessed from a recipe.
How we compare
| Feature | Online Tool Store | Pen and paper | A classroom platform |
|---|---|---|---|
| Flags hidden sources | ✓ | Depends | Yes |
| Covers the 14 major allergens | ✓ | ✗ | ✓ |
| Nothing uploaded | ✓ | ✓ | ✗ |
| Replaces reading the label | ✗ | ✗ | ✗ |
Recipe Allergen Checker is a preparation aid that flags likely and hidden sources; the packaging in your kitchen remains the only reliable authority.