What is this cloud?
Upload a sky photo and get an instant AI identification — cloud type, typical weather, altitude and how to tell it apart from look-alikes. Free, no sign-up.
📷 Drop a sky photo here, or tap to choose / take a photo
How it works
1. Upload a photo — Take or pick a sky photo with clear cloud structure. Your photo is re-encoded in your browser (location data stripped) before anything is sent.
2. AI identification — A vision model reads the shape, texture and altitude cues and ranks the three most likely cloud genera.
3. Read the report — Get the cloud type with a confidence score, the typical weather it brings, and the features that separate it from similar clouds.
The 10 cloud genera
Every cloud in the sky belongs to one of ten genera in the WMO International Cloud Atlas. Learn to tell them apart:
Base roughly 5-13 km
Base roughly 5-13 km
Base roughly 5-13 km
Base roughly 2-7 km
Base roughly 2-7 km
Base often below 3 km
Base below roughly 2 km
Base below roughly 2 km
Base roughly 0.4-2 km
Base roughly 0.5-2 km, tops up to 12 km+
Test yourself
Think you can tell cirrus from cirrostratus? Take the 10-question cloud types quiz.
Cloud gallery
Browse real identified cloud photos, organised by genus.
Frequently asked questions
What is cloud identification?
It means matching the cloud you see to one of the ten genera in the WMO International Cloud Atlas — cumulus, cirrus, stratus and so on — based on shape, altitude and structure. Upload a clear sky photo and the identifier ranks the three most likely genera with a confidence score.
How accurate is it?
On our 20-photo verified reference set covering all ten genera, the model's top choice was right 85% of the time and the correct genus was in its top three 100% of the time. Accuracy depends on photo quality: clear edges, natural colour and enough sky context help. Treat results as educational guidance.
Is it free?
Yes. You can identify a few photos per day for free, with no account. The daily limits exist because each identification runs a real AI model.
Which cloud types can it identify?
All ten genera: cumulus, stratus, stratocumulus, altocumulus, altostratus, nimbostratus, cirrus, cirrocumulus, cirrostratus and cumulonimbus — plus it will honestly report when a photo has no identifiable cloud.
What makes a good photo for identification?
Daylight, no heavy filters, and enough of the sky to show the cloud's base, top or layered texture. Very dark, blurry or tightly cropped photos are harder to classify.
What happens to my photo?
Your photo is re-encoded in your browser first, which strips location (EXIF) data. The image is sent to our identification service, processed, and not stored or published. See the privacy policy for details.