DOM inspector

DOM Inspector — Azad University
Everything runs on your device — nothing is uploaded
Source HTML

Paste a page's HTML (View Source → copy), or drop an .html file here. A URL can't be fetched in the browser without a server, so DOM Inspector works on the markup you provide — keeping everything private.

Build a DOM map to begin.
SELECTION
Click a node in the DOM map to inspect its HTML, CSS and score.
Page, metadata & SEO audit

Parses the <head> and content of the HTML you loaded in the Inspector. For live IP / hosting / server-tech lookups, those require a server request to the remote site — see the note below.

Search & social preview

Load HTML and run the analysis to preview how this page looks in search results and social cards.

Live server lookup (optional, not private)

IP address, web-hosting technology and live server headers can't be read in the browser — the same-origin policy blocks it, and reading them needs a server to fetch the remote site. DOM Inspector keeps everything on your device by default. If you want those, open a dedicated third-party service in a new tab — this sends the domain to them, not to Azad University.

Contrast checker (WCAG 2.1)
Aa
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contrast ratio
Specificity calculator

Enter one selector per line to see its (ids, classes, elements) weight and which one wins.

Box-model visualizer
×
Color converter
CSS unit converter (px ⇄ rem ⇄ em ⇄ pt ⇄ %)
Regex tester

MATCHES (highlighted)

JSON formatter & validator
JWT decoder

Decodes header & payload locally. Signature is not verified (that needs the secret) — never paste production secrets.

Encode / decode