Hidden camera detector
A hidden camera detector that runs in your browser.
Sweep the room with your phone. CamFinder reads lens retroreflection and infrared bloom straight from the camera feed, and holds whatever answers back.
- No upload
- Runs on your device
- No account
What a hidden camera detector can honestly do
Hardware detectors sell two things: a ring of red LEDs and an RF meter. The LEDs work by making lenses glint, which is something your phone torch and sensor can already do. The RF meter finds transmitters, but it also finds the router, the smart TV, and the neighbour's doorbell — which is why people give up on them. CamFinder does the optical half properly, and tells you plainly that it does not do the radio half at all.
Signals
What a scan looks for
Three signals, all of them visible to a phone camera you already own.
Optical
Lens retroreflection
A camera lens sends light straight back where it came from. Sweep a bright light across a shelf and a hidden lens answers with a small, fixed glint that follows you.
Infrared
Emitter bloom
Night-vision cameras light the room with infrared your eyes can't see. Your phone's sensor can. It reads as a pale violet glow ringing the lens.
Placement
Sightlines
A camera has to see something to be worth hiding. The scan weights objects with a clear view of the bed, the shower door, and where you undress.
Sequence
How the scan runs
Four passes, in order. The last one is the scan's own work, not yours.
- 01
Allow the camera
The scan runs in the browser. Your phone asks once, and you can revoke it just as fast.
- 02
Sweep the room slowly
Hold the phone at chest height and pan one wall at a time. Slow beats thorough — a fast sweep skips glints entirely.
- 03
Check what it flags
Flagged points hold on screen with how long they have stayed put. Most of them will be screws, smoke sensors, or ordinary reflections.
- 04
Let it rule things out
As you move, the scan compares every flagged point against the room's own motion. A lens stays stuck to its object; a reflection slides off and gets marked as ruled out.
Why the radio half is the part that fails
A radio detector cannot tell a hidden camera from a smart bulb, because both are just a transmitter to it. In a modern room there are already a dozen of them, and a wireless camera can be switched to record onto a card instead of streaming, at which point it emits nothing at all. Optics do not have that escape route: a lens has to be pointed at you and it has to be exposed, whether or not anything is being transmitted.
Field guide
Where cameras usually are
Hidden cameras are placed for sightlines, not for cleverness. Start with anything that faces a bed, a door, or a shower.
Hotel room
- Smoke detectors mounted above the bed
- Alarm clocks turned toward the pillow
- TV bezels and set-top boxes
- Air vents on the bathroom wall
Short-term rental
- Shelf décor with a clean line to the bed
- USB chargers and power strips
- Routers placed unusually high
- Picture frames and wall art
Changing room
- Gaps in mirror seams and trim
- Coat hooks and hanger rails
- Ceiling tiles directly overhead
- Ventilation grilles at eye level
Privacy
Nothing leaves your phone.
The scan runs entirely in your browser. Frames from your camera are read, measured, and discarded in the same moment. They are never uploaded, never stored, and never sent anywhere. There is no account, so there is nothing for anyone to request from us.
- No frames uploaded
- No account, ever
- Nothing is stored
Questions