Browser & Utilities
Inspect your device, preview code, test input
Read your screen size, viewport, pixel ratio and user agent, test keyboard and pointer events, inspect files by drag and drop, and preview HTML, CSS, Markdown and SVG live. Nothing here is transmitted - the readings come from your own browser APIs.
17 tools in this category
Browser Information Viewer
See what your browser reports about itself: version, engine, language, time zone and capabilities.
Clipboard Text Cleaner
Strip the invisible characters that come with text copied from documents and web pages.
CSS Live Preview
Try CSS against sample markup and see the result immediately.
Device Pixel Ratio Viewer
Find your display density and how large an image needs to be to look sharp on it.
Drag and Drop File Inspector
See exactly what a browser knows about a file before it is read.
HTML Live Preview
Write HTML and see it render immediately in an isolated frame.
JavaScript Scratchpad
Run a snippet of JavaScript in an isolated sandbox and see the console output.
Keyboard Key Code Viewer
See the key, code and legacy keyCode values for any key you press.
Local File Metadata Inspector
Inspect a file from your device without uploading it anywhere.
Markdown Live Preview
Write Markdown and see the rendered result, with sanitised HTML you can copy.
Mouse Coordinate Viewer
Understand the difference between client, page and screen pointer coordinates.
My User Agent
See your browser user agent string and what it decodes to.
Operating System Detector
Work out which operating system and device type your browser is reporting.
Screen Resolution Viewer
See your screen resolution, available area, colour depth and pixel density.
SVG Live Preview
Paste SVG markup and see it rendered on a transparency checkerboard.
Touch Support Tester
Check whether your device reports a touchscreen, and how many touch points it supports.
Viewport Size Viewer
Check the size of your browser viewport and which CSS breakpoint it falls into.