UD5 Toolkit
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.
Tag: Browser Info - Version & Features
22+ toolsBrowser Feature Compatibility Lookup – Can I Use Data
Search any HTML, CSS, or JavaScript feature and instantly see browser support percentages and version notes. Offline‑capable with embedded data.
IndexedDB Browser - Online View & Edit Client‑Side DB
Explore your website’s IndexedDB databases and object stores. Add, delete, and inspect records. Like phpMyAdmin for IndexedDB.
Local JSON Data Explorer - Online Browser Storage Viewer
View, edit, and manage JSON objects saved in your browser's localStorage. Delete, export, or import keys. No setup.
PDF Text Extractor - Online Copy Text from PDF Without Upload
Extract plain text from a PDF file entirely in the browser using PDF.js. No file upload to server. Supports multi-page extraction and search.
Browser Screen Recorder - Online Record Tab & Download WebM
Record your screen, window, or tab with audio directly in the browser. Download the recording as a WebM file. No upload.
Tampermonkey Script Skeleton - Online UserScript Generator
Fill in name, match URL, and description to get a ready‑to‑edit UserScript header. Start your browser extension easily.
Browser Window Info - Online Viewport & Screen Data
See exact dimensions of your current browser inner/outer window, screen resolution, and pixel ratio. Developer debug.
Browser Screen Recorder - Online Record Tab & Download WebM
Record your screen, window, or tab with audio directly in the browser. Download as WebM. No extension required.
Web Bluetooth Scanner - Online Explore Nearby Devices
Scan for nearby Bluetooth Low Energy devices using the browser. Read device names and signal strength. Experimental API.
IndexedDB Browser - Online View & Edit Client‑Side DB
Explore your website’s IndexedDB databases and object stores. Add, delete, and inspect records. Like phpMyAdmin for IndexedDB.
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.
User Agent Parser - Online Browser & OS Detector
Paste a user agent string to get a human-readable breakdown of browser, operating system, and device. See your own current agent info automatically.
Keyboard Shortcuts Viewer - Online Your Browser & OS Keys
Display a dynamic list of keyboard shortcuts for the current browser and operating system. Filter by category. Keep it open for reference.
User Agent Style Sheet Explorer - Online See Default CSS
Browse the built‑in styles that browsers apply to HTML elements. Understand why your page looks different. Static reference.
Browser Font Stacks Explorer - Online Defaults Per OS
See which fonts map to generic families (serif, sans‑serif, monospace) on different operating systems. A handy reference.
Instant Image Slideshow - Online Local Photo Player
Select a folder of images and start a full‑screen slideshow right in your browser. Adjust interval and transition. No upload.
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.
Cookie String Parser - Online Decode & Format Browser Cookies
Paste a raw cookie string and see a formatted key‑value table. Debug session cookies and understand flags. Runs in browser.
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.
CSS Compatibility Linter - Online Check Browser Support
Paste your CSS and see warnings for properties that have limited browser support. Links to CanIUse. Modernize safely.
Screen Recorder - Online Record Browser Tab & Download WebM
Record your screen, application window, or browser tab directly using the Screen Capture API. Download as WebM. All local.