Popular Device & Media Tools workflows

Direct links to four high-demand tools in this category.

Online Ruler Screen Size Calculator Scroll Wheel Test Online Mirror

34 device & media tools

Device & Media Tools

Browser-local tests for microphones, webcams, speakers, keyboards, mice, touch, controllers, displays and capture workflows.

Connect → Test → Measure → Diagnose → Retest

Start with a quick functional check, use browser-visible measurements only when useful, and keep permission and hardware boundaries explicit.

Calls, camera & audio

Check the devices most likely to fail immediately before a meeting, class, recording or stream.

Pre-Call Device CheckThe combined checklist is for quick readiness. Open the dedicated Mic, Webcam or Speaker tools when you need deeper measurements or troubleshooting.Media Permission CheckerPermission APIs vary by browser. A state of unsupported means the browser did not expose that query here; it does not automatically mean camera or microphone access itself is unsupported.Mic Test / Microphone TestUse Mic Test for basic signal and playback. Use Microphone Clipping Test when the question is specifically whether normal-use peaks are approaching digital full scale.Microphone Clipping TestSpeak at the normal level you plan to use. Do not shout to force a peak; the useful question is whether ordinary use is already too close to digital full scale.Webcam TestUse the actual negotiated stream settings rather than assuming a requested 1080p or 4K mode was delivered.Webcam FPS TestChoose a camera, run a timed local frame sample, and compare actual preview FPS, median frame interval, jitter, and captured resolution without uploading video.Speaker TestStart with comfortable system volume. A browser tone can verify channel routing but cannot calibrate loudness, hearing, distortion or frequency response.Online MirrorPreview your selected camera locally, toggle mirroring, zoom the view, and capture a local snapshot if needed.Media Device CheckerDevice labels and complete enumeration can remain hidden until permission is granted; absence from a pre-permission list does not prove the hardware is missing.

Keyboard, pointer & controllers

Verify browser-visible input events, simultaneous keys, pointer movement, gestures, wheels, controllers and touch.

Keyboard TestUse Keyboard Ghosting or Keyboard Chatter when simultaneous-key rollover or unwanted duplicate presses are the actual problem.Key Code TesterPress keys to inspect KeyboardEvent values and copy a live event history for debugging or hardware checks.Keyboard Ghosting TestHold several keys together and compare the physical combination with the codes the browser receives; missed keys can reveal a rollover limitation, but the browser cannot inspect the keyboard matrix directly.Keyboard Chatter TestPress keys normally and review repeated same-key events that arrive inside a configurable debounce window; results are browser-observed and not a hardware certification.Mouse TestUse polling, jitter, DPI, and scroll diagnostics only when those measurements answer the problem you are checking.Touchpad TestThe page deliberately reports event patterns rather than claiming to identify the physical hardware, because browsers usually do not expose a reliable mouse-versus-touchpad identity.Mouse Jitter TestDraw a deliberate straight or curved path, then review distance, straight-line efficiency, average turn, sample cadence, and a browser-local trace without uploading pointer data.Scroll Wheel TestScroll inside the test zone to inspect vertical/horizontal deltas, event count, recent cadence, delta mode, direction changes, and a small rolling history.Gamepad Tester / Controller TesterA browser can expose controller values but cannot certify mechanical condition; compare neutral stick values and repeated movement patterns rather than one momentary sample.Touchscreen TestBrowser touch events are useful for functional checks but do not replace manufacturer calibration or hardware diagnostics.Pointer Event InspectorView pointer type, ID, buttons, pressure, contact geometry, tilt, twist, timestamps, coalesced-event counts, and a copyable recent-event log locally in your browser.

Display, timing & motion

Inspect panel pixels, gradients, frame cadence, motion behavior and screen geometry with browser-visible measurements.

Dead Pixel TestCheck the full panel at normal viewing distance and lighting; this is a visual inspection aid rather than automated pixel classification.Display TestSwitch among fullscreen-friendly display patterns to inspect pixels, clipping, gradients, and text sharpness.Screen Gradient TestChoose a gradient pattern and fullscreen the test area to inspect smooth tonal transitions.Refresh Rate TestKeep the tab visible and avoid heavy background work. The result describes browser frame cadence, not a direct electrical measurement of panel timing.Frame Time TestCollect requestAnimationFrame samples and inspect median, average, p10–p90 spread, and long-frame count.Motion Clarity TestAdjust speed and object size, then compare moving text and high-contrast blocks at your current browser frame rate.Screen Resolution CheckerOpen the page at the browser size you want to inspect. The report updates on resize and distinguishes CSS pixels from the device-pixel estimate derived from devicePixelRatio.Screen Size CalculatorEnter diagonal size, aspect ratio, and resolution to calculate display dimensions and PPI for monitors, TVs, laptops, and other screens.

Capture & physical-reference utilities

Use browser-native capture and practical screen/camera reference tools without installing an app.

Online Screen RecorderChoose what to share, optionally include microphone audio, preview the capture, and download a WebM recording without uploading it.Online RulerCalibrate once against a standard payment card or known physical length, switch horizontal/vertical orientation, measure a span, use fullscreen, and keep the calibration locally in this browser.Printable Ruler GeneratorChoose paper, units, ruler length and tick density, then create a 1:1 printable ruler with built-in 50 mm and ID-1 card verification marks.Online ProtractorDrag the vertex and ray handles, optionally place them over an uploaded image, inspect the smaller/reflex angle and use snapping without uploading the image.Device InfoSee useful client-side device and browser details without installing software.

All Device & Media Tools

Device & Media Tools

Online Screen Recorder

Record a browser tab, application window, or screen directly in your browser.

Device & Media Tools

Mic Test / Microphone Test

Run a private microphone check with device selection, browser-visible RMS/dBFS/peak feedback, requested processing constraints and short playback verification.

Device & Media Tools

Webcam Test

Run a private webcam preview with device and preferred-resolution controls, actual negotiated size, track FPS, measured preview FPS, mirror/fullscreen and snapshots.

Device & Media Tools

Keyboard Test

Verify keyboard events with a live key map, held/seen key state and browser-exposed key/code information.

Device & Media Tools

Mouse Test

Verify browser-visible mouse buttons, movement, coordinates, wheel behavior, dragging, double clicks and recent pointer cadence.

Device & Media Tools

Dead Pixel Test

Inspect a display with fullscreen solid-color fields and controlled color changes.

Device & Media Tools

Screen Resolution Checker

Check CSS screen size, viewport, device pixel ratio, estimated device pixels, available screen, color depth, orientation, zoom scale, and copy a reusable report.

Device & Media Tools

Screen Size Calculator

Calculate the physical width, height, area, pixel density, and dot pitch of a display.

Device & Media Tools

Refresh Rate Test

Estimate browser-visible display cadence from requestAnimationFrame timing with median interval, jitter and stability context.

Device & Media Tools

Device Info

Inspect browser-reported screen, viewport, language, platform, memory, and capability information.

Device & Media Tools

Online Ruler

Use a calibrated on-screen ruler in centimeters, millimeters, inches or pixels, then drag across the ruler to measure a real object on your display.

Device & Media Tools

Gamepad Tester / Controller Tester

Inspect Gamepad API buttons, triggers, axes and stick positions locally in real time.

Device & Media Tools

Speaker Test

Play short browser-generated left, right or stereo tones at a conservative page-level gain for channel checks.

Device & Media Tools

Key Code Tester

Inspect browser keyboard events including key, code, location, repeat state, and modifiers.

Device & Media Tools

Keyboard Ghosting Test

Inspect simultaneous browser key detection with a visual held-key panel, maximum rollover count, unique keys seen, key-up tracking, and common gaming-combo presets.

Device & Media Tools

Mouse Jitter Test

Trace mouse or trackpad motion and inspect path efficiency, direction change, event spacing, and movement consistency in one local diagnostic.

Device & Media Tools

Scroll Wheel Test

Test mouse-wheel or trackpad scroll direction, delta mode, event cadence, reversals, and accumulated movement in the browser.

Device & Media Tools

Mouse DPI Calculator

Estimate effective cursor DPI from measured pointer travel, with inch/cm input, calibration guidance, and sensitivity/scale context.

Device & Media Tools

Touchscreen Test

Map browser-visible touch/pointer contacts and movement locally to help inspect dead zones and multi-touch behavior.

Device & Media Tools

Display Test

Run a browser display test for solid colors, grayscale, contrast steps, and sharpness patterns.

Device & Media Tools

Screen Gradient Test

Inspect a display for visible gradient banding with configurable grayscale and color ramps.

Device & Media Tools

Frame Time Test

Measure browser animation frame intervals and estimate frame-time consistency.

Device & Media Tools

Motion Clarity Test

Run a controllable moving-object test for browser display motion inspection.

Device & Media Tools

Online Mirror

Use your webcam as a private browser mirror with zoom and mirror controls.

Device & Media Tools

Media Device Checker

List browser-visible audio/video devices and media capabilities with explicit permission boundaries.

Device & Media Tools

Keyboard Chatter Test

Detect suspicious rapid repeated browser keydown events that can indicate keyboard switch chatter or double typing.

Device & Media Tools

Webcam FPS Test

Measure the browser-visible frame rate and frame-time stability of a live webcam preview.

Device & Media Tools

Online Protractor

Measure an angle interactively on screen or over a local image with draggable rays and instant degree readout.

Device & Media Tools

Printable Ruler Generator

Generate a true-scale metric, inch, or dual ruler for A4 or US Letter and print or download it as SVG.

Device & Media Tools

Pointer Event Inspector

Inspect browser PointerEvent data for mouse, pen, and touch input in real time.

Device & Media Tools

Pre-Call Device Check

Run microphone, camera and speaker basics on one page before a call or stream.

Device & Media Tools

Microphone Clipping Test

Measure browser-visible microphone RMS, peak dBFS, digital headroom and samples near full scale without recording or uploading audio.

Device & Media Tools

Touchpad Test

Inspect pointer and wheel events while you use a trackpad or other pointing device.

Device & Media Tools

Media Permission Checker

Inspect secure-context support, MediaDevices APIs, permission state where exposed, and visible camera/microphone device counts.