Picture‑in‑Picture Tester - Online Float Video Anywhere
Open a test video in Picture‑in‑Picture mode. Control entering and leaving PiP. Copy the code snippet for your own app.
UD5 Toolkit
Open a test video in Picture‑in‑Picture mode. Control entering and leaving PiP. Copy the code snippet for your own app.
A horizontal photo gallery that scrolls with a smooth CSS animation using scroll‑timeline. Pure HTML/CSS. Copy the code.
Search any HTML, CSS, or JavaScript feature and instantly see browser support percentages and version notes. Offline‑capable with embedded data.
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.
See which fonts map to generic families (serif, sans‑serif, monospace) on different operating systems. A handy reference.
Paste your CSS and see warnings for properties that have limited browser support. Links to CanIUse. Modernize safely.
Record your screen, window, or tab with audio directly in the browser. Download as WebM. No extension required.
Explore your website’s IndexedDB databases and object stores. Add, delete, and inspect records. Like phpMyAdmin for IndexedDB.
See a comprehensive table of which modern web APIs your current browser supports. Includes WebGPU, AVIF, and more.
View, edit, and manage JSON objects saved in your browser's localStorage. Delete, export, or import keys. No setup.
Browse the built‑in styles that browsers apply to HTML elements. Understand why your page looks different. Static reference.
Record your screen, window, or tab with audio directly in the browser. Download the recording as a WebM file. No upload.
Play a selection of local lo‑fi tracks (embedded). Simple UI with play/pause. No copyright issues. Stay focused.
Upload multiple sizes of the same image and generate the complete srcset and sizes attributes. For perfect responsive performance.
Explore your website’s IndexedDB databases and object stores. Add, delete, and inspect records. Like phpMyAdmin for IndexedDB.
Scan for nearby Bluetooth Low Energy devices using the browser. Read device names and signal strength. Experimental API.
Upload an image at multiple widths and generate a complete <picture> or <img srcset> snippet. Modern web performance.
Create a slow, zooming and panning photo montage (Ken Burns effect) from your images. Export as WebM video. Canvas.
Combine JPGs and PNGs into a single PDF. Drag to reorder pages. All processing happens locally; your files never leave your device.
See how many tabs you have open and estimate memory usage based on navigator object. Fun productivity check.
Fill in name, match URL, and description to get a ready‑to‑edit UserScript header. Start your browser extension easily.
Generate a hash showing how trackers can fingerprint your browser (canvas, WebGL, fonts). Educational and privacy‑aware.
Select multiple images, arrange their order, and merge them into a single PDF document. Works offline in your browser.
Upload two images and apply CSS blend modes (multiply, screen, overlay, etc.). See the result and copy the filter CSS. Pure frontend.
Look at HTTP headers and JavaScript objects to guess which browser extensions might be installed. For awareness.
See exact dimensions of your current browser inner/outer window, screen resolution, and pixel ratio. Developer debug.
Upload two face portraits and watch a simple morphing transition. Not professional, but fun experiment with canvas.
Paste a simple drum tab or select a pattern and hear it played. Learn drum set notation interactively.
Paste a raw cookie string and see a formatted key‑value table. Debug session cookies and understand flags. Runs in browser.
Record your screen, application window, or browser tab directly using the Screen Capture API. Download as WebM. All local.