Free Cosmetic Ingredient Checker & Allergen Scanner
Scan any product label or paste ingredients to flag known irritants and allergens — no signup required.
What we check for:
How AllerNote's ingredient checker works
AllerNote is a free cosmetic ingredient checker built for people with sensitive skin, eczema, contact allergies, and patch-tested triggers. Snap a photo of any product label or paste its INCI list — the scanner reads each line, normalises chemical names (so Arachis Hypogaea shows up as Peanut Oil), and flags ingredients known to cause skin reactions.
A dedicated allergen scanner for cosmetics
Generic safety apps grade every product the same way for everyone. AllerNote's allergen scanner is different: it cross-references each ingredient against published contact-dermatitis databases and the EU 26 fragrance allergen list, so it surfaces the molecules most likely to trigger irritation. Sign in with a free account to add your specific allergens and turn the scanner into a personal safety check.
What the allergen scanner flags
- Fragrance allergens — including the EU 26 (linalool, limonene, geraniol, citronellol, eugenol, coumarin, and more) plus parfum and essential oils that oxidise into sensitisers.
- Preservatives — methylisothiazolinone (MI), methylchloroisothiazolinone (MCI), parabens, and formaldehyde releasers like DMDM hydantoin and quaternium-15.
- Surfactants & sulfates — SLS, SLES, and cocamidopropyl betaine (ACDS Allergen of the Year 2004).
- Sunscreen filters — oxybenzone, octocrylene, and other photoallergens.
- Hair-dye sensitisers — PPD and related para-amines.
Frequently asked questions
Is the ingredient checker free?
Yes. Unlimited scans, both photo OCR and manual entry, with no account needed. A free account adds personal allergy matching, scan history, and reaction tracking.
What products work with the allergen scanner?
Any cosmetic with a printed ingredient list — skincare, moisturisers, cleansers, sunscreens, makeup, shampoos, conditioners, body washes, lip balms, baby lotions, and after-shaves. The scanner handles INCI lists in multiple languages.
How accurate is the ingredient analysis?
The scanner uses Google's vision model to extract ingredients and matches them against curated allergen databases. Accuracy depends on the photo (clear, in focus, close-up of the label gives the best results). For ingredients we don't recognise, you can edit or add them manually before running the check.
Can I check a product without creating an account?
Yes. This page is fully usable anonymously. Your scan is saved locally to your browser only — sign up later if you want a permanent history or personalised allergy matching.
Does the scanner detect my specific allergens?
The free anonymous scan flags common irritants and the EU 26 fragrance allergens. To check products against your own patch-test results or known triggers, create a free account and add them to your allergy profile — every future scan then uses that profile.