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Device Pixel Ratio Checker - Online See Your DPR

Display your screen's current devicePixelRatio. See how it changes when you zoom. Useful for high‑res image decisions.

Developer Tools check device pixel ratio display DPR

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Emoji Version Detector - Online Check Unicode Support

See how your browser renders emojis from different Unicode versions. Detect gaps in your system's emoji font support.

Developer Tools emoji support Unicode version

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Window Size Detector - Online Outer & Inner Dimensions

See outerWidth, innerWidth, outerHeight, innerHeight, screenX/Y, and availWidth/Height live. Understand the viewport.

Developer Tools dimensions size viewport window

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Browser Feature Support Detector - Online Check Your Device

See a comprehensive table of which modern web APIs your current browser supports. Includes WebGPU, AVIF, and more.

Developer Tools API browser feature detection support

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Online Ping Test - Measure Latency to Servers

Send HEAD requests to popular websites and measure the round‑trip time. Quick network health check. Client‑side.

Info latency network ping test

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Font Tech & Format Checker - Online Supports incremental font?

Detect browser support for font‑tech() and font‑format() values in @font‑face src. Check COLRv1, variable, etc.

Developer Tools CSS font‑format font tech support

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Screen Color Depth Checker - Online 8‑bit vs 16‑bit

See your monitor's color depth and pixel depth. Detect if HDR or wide gamut is available using media queries.

Info bits check color depth screen

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Connection Speed Estimator - Online Download Test

Quickly estimate your internet connection speed by downloading a small test file. See class and recommendations.

Info connection download speed test

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Viewport & Document Size Viewer - Online Real‑Time

See the current viewport width/height, document size, scrollbar width, and pixel ratio. Essential responsive data.

Developer Tools dimensions responsive size viewport

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Video Metadata Viewer - Online Check Codec, Bitrate & Size

Drop a video file and instantly see its container format, codec(s), resolution, duration, and bitrate. Browser‑based, no upload.

Info codec info metadata video

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Storage Quota Visualizer - Online See Available Space

Call navigator.storage.estimate() and display a visual pie chart of used vs. available browser storage. For PWA debugging.

Developer Tools estimate quota storage visualizer

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Network Information API Checker - Online Downlink Speed

Display your effective connection type (4g, 3g, etc.) and downlink speed using the Navigator API. Adapt your app accordingly.

Info API connection Network Information speed

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Battery Status API Viewer - Online Check Level

See your device's battery level, charging status, and discharge time using the Battery Status API. Fun utility.

Info API Battery charging level

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Browser Storage Quota Estimator - Online Check Limit

Estimate how many MB/GB your storage can hold based on navigator.storage.estimate() and display as a pie chart.

Developer Tools estimator IndexedDB quota storage

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HDR Color Preview - Online See Wide Gamut Colors

Test if your display supports HDR colors by rendering a gradient in Rec.2020 space. See what you're missing. Canvas based.

Color Tool color HDR preview wide gamut

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Browser Color Gamut Test - Online P3 or sRGB?

Check if your browser and display support the wider DCI‑P3 color space. See the difference with a simple test pattern.

Color Tool gamut P3 sRGB test

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Media Device Tester - Online Check Camera, Mic & Speaker

Quickly test if your webcam, microphone, and speakers work correctly. See live video and audio meter. No data sent.

Info media microphone test webcam

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Browser Fingerprint Viewer - Online See Your Unique ID

Generate a hash showing how trackers can fingerprint your browser (canvas, WebGL, fonts). Educational and privacy‑aware.

Info browser canvas fingerprint privacy

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Browser Storage Usage Viewer - Online See LocalStorage & IndexedDB Quota

Check current browser storage usage (localStorage, IndexedDB, Cache) and available quota. Handy debugging tool.

Developer Tools IndexedDB localStorage quota storage

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Tab Counter & Memory Estimator - Online Window Stats

See how many tabs you have open and estimate memory usage based on navigator object. Fun productivity check.

Info browser counter memory tabs

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Browser Window Info - Online Viewport & Screen Data

See exact dimensions of your current browser inner/outer window, screen resolution, and pixel ratio. Developer debug.

Developer Tools browser info viewport window

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What Is My IP Address - Online IP Lookup & Info Tool

Find your public IP address and view approximate geolocation, ISP, and browser header details. No personal data stored. Static and instant.

Info IP address location lookup my IP

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Screen Resolution Detector - Online Viewport Size Checker

Detect your current screen resolution, viewport dimensions, and device pixel ratio. Useful for responsive design testing. No data collection.

Developer Tools detector display screen resolution viewport

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What Are My DNS Servers - Online Detect via Browser

Attempt to detect your current DNS resolver IPs using DNS‑leak test queries. Educational. Privacy‑friendly.

Info detect DNS network server

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File MIME Type & Magic Bytes Detector - Online

Drop a file to see its MIME type and the first few magic bytes (hex and ASCII). No upload, works instantly.

Developer Tools detector file magic bytes MIME

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Browser Extension Headers Check - Online Detect Injected Scripts

Look at HTTP headers and JavaScript objects to guess which browser extensions might be installed. For awareness.

Info browser checker extension privacy

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What is My Browser - Online Browser Details Viewer

Display detailed information about your current browser, including version, JavaScript status, cookie support, and screen size. Works instantly with no input.

Developer Tools browser info details screen user agent

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PDF Metadata Viewer - Online Read Author, Title & Keywords

Drop a PDF and see its embedded metadata: author, title, creation date, and more. No content is uploaded; pure browser PDF parsing.

Document Tool info metadata PDF viewer

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Virtual Keyboard Tester - Online Check All Keys Functionality

Press keys on your physical keyboard and see them highlighted on a virtual keyboard. Detects multi-key rollover. Quick hardware check.

Info keyboard key press tester virtual