Device & Network Diagnostic Tools
Test your internet speed, check for IP leaks, scan your browser fingerprint, verify your webcam and microphone, generate WiFi QR codes, and more. All tools run directly in your browser — no downloads, no signups, completely private. For deeper native diagnostics, try our DeviceGPT app.
Background Color Detector
Use this free webcam background color detector for video calls. Check if your...
Battery Status Checker
Check battery status checker. See your battery level, charging status, estimated time...
Browser Fingerprint Test
Check how unique your browser fingerprint is. This free test collects canvas, WebGL,...
What Does Your Browser Reveal?
Discover what your browser reveals about your device. See user agent, screen...
DNS Leak Test
Check DNS leak test. Check your IP address, ISP, DNS resolver, and whether your DNS...
DNS Lookup
Use this free DNS lookup tool. Check A, AAAA, CNAME, MX, NS, TXT, and SOA records for...
Encrypted DNS Checker
Check whether your browser can reach major DNS-over-HTTPS providers and review secure...
What Is My DNS Server?
Get a best-effort answer to your DNS setup and see what a browser page can actually...
HTTP Headers Viewer
Discover what HTTP headers your browser sends and receives. View User-Agent,...
Is My Website Down?
Free instant status check with response time, DNS, and server IP. Runs in your browser, no sign-up.
Website Monitor Dashboard
Track multiple websites at once with live status, uptime %, and response-time sparklines. In-browser only.
Internet Speed Test
Test your internet speed instantly. Measure download speed, upload speed, ping...
Internet Speed Calculator
Calculate how much internet speed your household needs based on devices, streaming, gaming, and...
IP Geolocation Lookup
Look up the geographic location of any IP address. Find city, region, country, ISP,...
What Is My IP Address?
Find your public IP address, geographic location, ISP, timezone, and coordinates...
Online Metronome
Use this free metronome with adjustable BPM, time signatures, and accent options....
Microphone Volume Meter
Use this free microphone test and volume meter. Check mic input level in real-time dB,...
Online Mirror Camera
Use your phone or laptop as a mirror instantly. Free online mirror camera with flip,...
Network Connection Info
Use this free network connection info tool. Check your connection type, effective...
Online Tuner & Tuning Fork
Use this free tuning fork for guitar, ukulele, and other instruments. Play precise...
Passport Photo Maker
Generate passport photo maker with webcam capture. Crop and resize to US, UK, EU,...
Password Strength Checker
Test how strong your password is with our free checker. Analyze entropy, crack time...
Online Privacy Score
Check your online privacy score. Free tool tests your browser for VPN usage, tracking...
Online Photo Booth
Use this free photo booth with webcam timer, flash effect, and classic photo strip...
QR Code Scanner
Scan QR codes instantly with your device camera. Free online scanner with...
Resolution Checker
Check your screen resolution, pixel density, viewport size, and DPI. Upload images to check their dimensions.
Screen Resolution Test
Check screen resolution test tool. Check your display resolution, viewport size, pixel...
Sound Level Meter (dB Meter)
Use this free sound level meter to measure ambient noise in decibels. Monitor...
Tone Generator
Generate tone generator — play sine, square, sawtooth, and triangle waves at any...
VPN Cost Comparison Calculator
Compare VPN prices side-by-side. Calculate total cost over 1, 2, or 3 years for...
VPN Leak Test
Run a combined privacy scan for public IP exposure, WebRTC leaks, and encrypted DNS...
VPN Detector
Check if your VPN is working right now. Free VPN detection tool tests your IP, ISP,...
VPN Speed Test
Test your VPN connection speed with download speed, latency, and jitter measurements....
Webcam & Microphone Test
Check webcam and microphone test. Check if your camera and mic work, see live video...
WebRTC Leak Test
Check if WebRTC is leaking your real IP address. This free browser test detects local...
White Noise Generator
Generate white noise generator for sleep, focus, and relaxation. Play white, pink, or...
WiFi QR Code Generator
Generate WiFi QR code generator. Create a scannable QR code for your WiFi network so...
WiFi Range Calculator
Calculate your WiFi coverage range based on router power, frequency band, walls, and obstacles. Free visual estimator.
Download Time Calculator
Calculate how long a file download will take based on file size and internet speed. Supports all units from KB to TB.
Why Use Browser-Based Diagnostics?
Browser-based diagnostic tools give you instant insights about your device, network, and privacy without installing anything. They are perfect for quick checks — is my VPN working? Is my webcam functional? How fast is my connection right now? These tools use modern browser APIs to collect real data directly on your device.
Want Deeper Device Analysis?
For comprehensive device health monitoring, battery analysis, power consumption tracking, security scanning, and AI-powered diagnostics, download DeviceGPT — our free Android app that turns complex device data into plain-English explanations.