Bug Identifier by Picture: Upload a Photo, Get an ID (Free)

How to take a usable photo for the bug identifier

Get close and focused
Tap the bug on your phone screen until the focus locks. Phone zoom keeps detail; cropping later loses it.
Use natural light
Move toward a window or shine a flashlight from above. Hard shadows confuse the AI; soft side light shows texture.
Include the whole body
Show the head, legs, and wings (if any). Cutting off body parts cuts the AI's accuracy in half.
Add scale
Place a coin or fingertip in the frame. The size of a bug is one of the strongest identification clues.
Upload to the tool above
JPG or PNG up to 15 MB. The result appears in a few seconds, with a confidence level.

The angle that matters changes with the bug

Generic photo advice gets you most of the way. The last stretch depends on what you are photographing, because the deciding feature sits somewhere different on each group. Shoot the feature that settles the identification, not just the prettiest side of the insect.

Where to aim, by what you found

Spiders

Shoot this: The underside, if you can do it safely through a glass
Why it decides the ID: A black widow's red hourglass is only on the belly. Top-down, a widow is just a black spider

Beetles

Shoot this: Straight down on the back
Why it decides the ID: Wing case (elytra) pattern, shape, and shine separate species that look alike from the side

Caterpillars

Shoot this: The full length, side on
Why it decides the ID: Stripes, horns, and which end is the head. Both ends look similar in a cropped shot

Flies and gnats

Shoot this: Wings at rest, from above
Why it decides the ID: One pair of wings means a true fly. Wing venation splits the families

Ants vs termites

Shoot this: The waist, side on
Why it decides the ID: A pinched waist and elbowed antennae mean ant. Straight-sided means termite

Bed bugs

Shoot this: Top down, flat on the seam
Why it decides the ID: Flatness, the segmented abdomen, and the absence of hair rule out carpet beetle larvae

Mites and tiny specks

Shoot this: Against plain white paper
Why it decides the ID: At under a millimetre, contrast matters far more than magnification

Moths

Shoot this: Wings spread, from above
Why it decides the ID: Resting posture and wing markings. A folded moth hides its diagnostic pattern

Where to aim, by what you found

Subject	Shoot this	Why it decides the ID
Spiders	The underside, if you can do it safely through a glass	A black widow's red hourglass is only on the belly. Top-down, a widow is just a black spider
Beetles	Straight down on the back	Wing case (elytra) pattern, shape, and shine separate species that look alike from the side
Caterpillars	The full length, side on	Stripes, horns, and which end is the head. Both ends look similar in a cropped shot
Flies and gnats	Wings at rest, from above	One pair of wings means a true fly. Wing venation splits the families
Ants vs termites	The waist, side on	A pinched waist and elbowed antennae mean ant. Straight-sided means termite
Bed bugs	Top down, flat on the seam	Flatness, the segmented abdomen, and the absence of hair rule out carpet beetle larvae
Mites and tiny specks	Against plain white paper	At under a millimetre, contrast matters far more than magnification
Moths	Wings spread, from above	Resting posture and wing markings. A folded moth hides its diagnostic pattern

For a suspected termite, our page on what termites look like up close shows the antennae, waist and soldier heads to zoom in on.

What a bug identifier by picture actually reads in your photo

Knowing what the model looks at explains why some photos work and others do not. It does not match your image against a library of pictures. It weighs several measurable features together. That is why a missing leg or a cropped abdomen costs more accuracy than a blurry background does.

Body proportions. The ratio of head to thorax to abdomen, and how long the legs are relative to the body. This is the single heaviest signal, and it is what a cropped photo destroys.
Leg count and arrangement. Six versus eight settles insect versus arachnid before anything else is considered.
Wing state. None, one pair, two pairs, or hardened wing cases. Each points to a different order.
Colour pattern and its layout. Not just the colour, but where the bands, spots, or stripes sit on the body.
Surface texture. Smooth, hairy, waxy, or bristled. This is what separates a bed bug from a carpet beetle larva.
Scale, when you give it one. A 2 mm bug and a 20 mm bug can look identical in a frame-filling photo. A coin removes the ambiguity entirely.

How to read the confidence score

Every result carries a confidence number, and it is worth taking seriously rather than skipping past. A low score is the tool telling you something useful, not failing.

What each confidence band means in practice

90% and above

How to treat it: Very likely correct at species level
What to do next: Act on it. Follow the linked guide

70 to 89%

How to treat it: Confident, occasionally the wrong species in the right family
What to do next: Check the look-alikes listed with the result

50 to 69%

How to treat it: A best guess. The group is probably right, the species may not be
What to do next: Reshoot with better light and scale, then compare

Below 50%

How to treat it: The tool is genuinely unsure and says so
What to do next: Photo quality is usually the cause. Try a second angle

What each confidence band means in practice

Score	How to treat it	What to do next
90% and above	Very likely correct at species level	Act on it. Follow the linked guide
70 to 89%	Confident, occasionally the wrong species in the right family	Check the look-alikes listed with the result
50 to 69%	A best guess. The group is probably right, the species may not be	Reshoot with better light and scale, then compare
Below 50%	The tool is genuinely unsure and says so	Photo quality is usually the cause. Try a second angle

Any tool that never admits doubt is worse than one that does, because a confident wrong answer about a brown recluse or a black widow is the kind of mistake that matters. So when the score is low on something that might be medically serious, treat it as unknown and keep your distance.

When photo identification will not work

Photo ID has real limits, and knowing them saves you from trusting a result you should not. These are the situations where no identifier, ours or anyone else’s, can give you a dependable answer.

The bug is squashed. Proportions are the main signal, and crushing destroys them. A flattened specimen on paper is often unidentifiable.
It is a larva or a nymph. Immature stages frequently look nothing like the adult, and many are simply not distinguishable by eye at all.
The species needs a microscope. Some mites and small flies are separated by features under a millimetre. No phone camera resolves them.
You photographed a bite instead of a bug. Skin reactions look alike across species. Start at bug bite identification instead.
There is no bug in the frame. Damage, webbing, or droppings need the trace-based approach on what bug is this.

Free bug identifier app vs browser tool

Several apps offer bug identification by picture. The trade-offs:

Bug identifier by picture, apps and browser tools compared

This site (browser tool)

Install required: No
Free: Yes
Best for: Quick browser ID, mobile-friendly

Picture Insect (app)

Install required: Yes
Free: Limited free
Best for: Frequent mobile identification

iNaturalist (app)

Install required: Yes
Free: Yes
Best for: Rare or unusual species; community help

Seek by iNaturalist (app)

Install required: Yes
Free: Yes
Best for: Live camera scanning; family-friendly

Google Lens

Install required: Built-in to Android / Photos
Free: Yes
Best for: Quick visual lookup, broader than just bugs

Bug identifier by picture, apps and browser tools compared

Option	Install required	Free	Best for
This site (browser tool)	No	Yes	Quick browser ID, mobile-friendly
Picture Insect (app)	Yes	Limited free	Frequent mobile identification
iNaturalist (app)	Yes	Yes	Rare or unusual species; community help
Seek by iNaturalist (app)	Yes	Yes	Live camera scanning; family-friendly
Google Lens	Built-in to Android / Photos	Yes	Quick visual lookup, broader than just bugs

Bug scanner online, what to expect

An online “bug scanner” is just a bug identifier by picture under another name. They all do the same thing: take an image, return a species guess and a confidence score. Accuracy comes down to the model and to how good your photo is.

For most home situations you do not need a specialist tool. The browser identifier above handles common indoor and garden bugs. Your result often links to a deeper guide here, such as tiny black bugs in house or the spider identifier. Follow that link for safety notes and next steps.

Pest control disclaimer. Photo-based identification can help, but it is not always perfect. For dangerous spiders, large infestations, or anything you are unsure about, contact a licensed pest control professional.

Frequently asked questions

How does a bug identifier by picture work?

An AI vision model examines body shape, color, markings, leg count, and wing pattern in your photo. It compares those features to a trained set of common insects and spiders, then suggests the most likely match with a confidence level.

Is the bug identifier by picture really free?

Yes. The browser tool on this site is free, requires no signup, and works on phone, tablet, or laptop.

What is the best free bug identifier app?

Free options include Picture Insect, iNaturalist, and Seek by iNaturalist. Our browser tool gives you a quick answer without installing anything.

Can I identify a bug by photo without an app?

Yes. Upload your photo to the tool above, no app install required. The tool runs in your browser on any device.

What photo angle works best for bug identification?

A top-down shot showing the body, legs, and any wings or antennae works best. For spiders, include the underside if you can do it safely, the red hourglass on a black widow only shows from below. For caterpillars, capture both ends so the head is distinguishable from the rear claspers. Avoid extreme close-ups that crop off legs or wing edges; the tool reads body proportions, not just texture.

Does the bug identifier work for spiders?

Yes. For spider-specific identification, the dedicated spider identifier hub gives more detailed comparisons.

Can I identify a bug from a photo online for free?

Yes. Our bug identifier works entirely online in your browser, no app, no account, and no fee. Upload or snap a photo and the AI names the most likely insect or spider from the photo in seconds, with a safety rating. It works the same on a phone, tablet, or computer.

Why does my photo give a low confidence score?

Almost always one of four things: the body is cropped, the light is harsh enough to blow out the markings, the shot is too far away to resolve texture, or there is no scale in the frame. Body proportions are the heaviest signal the model uses, so a photo missing legs or a cut-off abdomen loses more accuracy than a slightly soft focus does. Reshoot straight down, in indirect daylight, with a coin beside the bug.

Can I identify a dead bug from a picture?

Yes, and often better than a live one, because it holds still. The exception is a squashed specimen. Crushing destroys the body proportions the model depends on, so a flattened bug on tissue is frequently unidentifiable. Place it on plain white paper, shoot straight down, and include something for scale.

Does the identifier work on larvae, maggots, and caterpillars?

Partly. Caterpillars with distinctive markings identify well, and photographing the full length side-on matters because both ends look similar when cropped. Generic pale grubs and maggots are much harder, since many species are genuinely indistinguishable by eye at that stage even to an entomologist.

How close should I get to the bug?

Close enough to fill roughly a third of the frame, and no closer. Filling the entire frame usually crops the legs or antennae, which costs more accuracy than the extra detail gains. Use the phone's zoom rather than cropping afterwards, because cropping throws away the pixels the model needs.

Is it safe to photograph a spider up close?

Keep a sensible distance and never handle a spider to pose it. Use zoom instead of proximity. If you need the underside, which is the only way to see a black widow's hourglass, coax the spider into a clear glass or jar and photograph through the base. Never reach toward a spider you think may be a widow or a recluse.

Are my uploaded photos stored?

Photos are sent to our identification service to get a result, then discarded. We do not build a profile of you. See our Privacy Policy for full details.

Bug Identifier by Picture: Upload a Photo, Get an ID

How to take a usable photo for the bug identifier

Get close and focused

Use natural light

Include the whole body

Add scale

Upload to the tool above