Online mole checker.
Catch changes early.
Worried about a spot? Answer 5 questions based on the ABCDE criteria dermatologists use and get a clear next step in about 30 seconds. Free, no sign-up. It does not diagnose.
Want a photo looked at too? AI photo check in the app (paid, describes what is visible, does not diagnose).
index
0.08
irregularity
Low
variance
18%
measured
4.2mm
change rate
Stable
NEXT STEP
49
Skin conditions
explained in detail
ABCDE
Clinical criteria
dermatologist standard
136
Pages
of medical content
30s
Self-check
suggested next step
How an AI mole checker works
About a minute from photo to next step. Prefer no photo? The 5-question ABCDE check is free.
1. Take or upload a photo
A clear, close photo of the spot. No app to install: it works in your browser.
2. The AI looks at the ABCDE signs
It describes the shape, border and colour visible in the photo. Size and change come from your answers.
3. Get your result and a next step
Keep watching it, show it to a doctor, or book a visit soon. It does not diagnose.
Paid photo check: open the web app
See the app
iPhone preview of CheckMole. Educational screening, not a diagnosis. The photo check is paid.
Live UV index by city — forecasts for 50 cities, no sign-up.
See it in 20 seconds
From worried glance to a clear next step
ABCDE Mole Checker
The same 5 criteria dermatologists use to screen for melanoma. Answer 5 questions about your mole and get a suggested next step — educational screening, not a diagnosis.
Start free check
Popular guides
Most-read answers, including moles after Accutane
Key conditions to know
The most searched skin conditions
Melanoma
The most dangerous skin cancer - but 99% survival when caught early. Learn the ABCDE signs.
Basal Cell Carcinoma
The most common cancer in humans. Slow-growing, rarely spreads, but can cause serious tissue damage if untreated.
Actinic Keratosis
Rough, sandpaper-like patches from years of sun damage. The most common precancer - 5-10% progress to squamous cell carcinoma.
Dysplastic Nevus
Atypical moles with irregular features. The single strongest visual risk marker for melanoma.
Seborrheic Keratosis
Waxy, stuck-on growths - the most common benign tumor in adults over 50. Harmless but frequently mistaken for melanoma.
Not sure what you see?
Side-by-side condition comparisons
Built on medical evidence
Every page on CheckMole is based on peer-reviewed dermatological literature and clinical screening guidelines.
Evidence-based
Content sourced from medical literature and clinical guidelines
Clinical criteria
ABCDE rule and risk factors used by dermatologists worldwide
Self-screening tools
Interactive assessments based on validated screening methods
Mole checker: common questions
Is the CheckMole mole checker free?
Yes. The ABCDE mole checker and the other self-check tools on this site are free and need no sign-up. The photo check and the photo history are part of the paid app: $4.99 for the first 7 days, then $9.99/week or $24.99/month until you cancel, or $9.99 one-time with nothing renewing.
Is CheckMole a free AI mole checker?
Partly. The free part is a questionnaire built on the ABCDE criteria, with no AI: your own answers decide the result. The AI mole checker is the photo check in the paid app, where AI describes what is visible in a photo of a spot (shape, border, colour). Fixed safety rules then combine that description with your answers to suggest a next step. It does not diagnose.
Can an app or AI tell if a mole is cancer?
No. Skin cancer is diagnosed by a doctor, usually with a dermatoscope and, when needed, a biopsy examined under a microscope. A phone photo cannot show what those show, and no app, ours included, can rule melanoma out. Read more in how AI skin cancer detection works and where it fails. A checker can help you decide how soon to get a spot looked at; it cannot tell you a spot is safe. If a mole worries you, see a dermatologist whatever the result.
What is the ABCDE rule?
ABCDE is a checklist dermatologists teach for spotting possible melanoma: Asymmetry, Border that is irregular, Colour that is uneven, Diameter over about 6 mm, and Evolving, meaning any change. A mole that stands out from your other moles, the ugly duckling sign, matters too. Some melanomas do not follow the rule, so a spot that worries you deserves a doctor's look even when it passes.
What happens to my photo?
The free 5-question check does not need a photo. If you add a photo for the AI check, it is resized in your browser and, only after you agree on that screen, sent once to Google's Gemini service for an automated description, before you pay; the photo itself is not stored on our servers. In the paid app your photos and results are stored only in your own browser, on your device. When you ask for a photo check, and only after you agree on that screen, the photo is sent once to Google's Gemini service for an automated description, without your name or email, and we do not store it. Details are in the privacy policy.
When should I see a doctor now instead of using a checker?
See a doctor promptly, without waiting for any online result, if a mole is changing in size, shape or colour, bleeds without being injured, does not heal, or is new and growing quickly. If you are unsure how urgent it is, read is this mole an emergency.
Worried about a mole?
Most moles are harmless. Our free ABCDE checker gives you a clear answer in 30 seconds, using the same criteria your dermatologist would use.
Check your mole nowFree. No sign-up required. Takes 30 seconds.