Free online web utilities

Measures distance to servers, jitter, lag spikes, packet loss and bandwidth to judge if Xbox Cloud Gaming will run well.

Builds QR codes for links, WiFi logins, contacts or SMS, with color and error-correction choices and PNG or SVG download.

Fetches a site's pages and assets and rates how likely it was built with AI app builders like v0, Bolt, Cursor or Lovable.

Pulls images from pasted web content and lists each one's alt text and URL with ready-made Markdown and HTML snippets.

Turns a Bluesky handle into its DID via the AT Protocol API.

Shows the posts a given Bluesky user has liked.

Lists posts that quote a given Bluesky post.

Checks a Bluesky account's recent posts for timing and engagement patterns typical of reply bots.

Set of drag-to-install bookmarklets for web development and everyday browsing.

Queries A, AAAA, MX, TXT and other record types through Cloudflare's DNS-over-HTTPS with a choice of resolver.

Fetches up to 1,000 recent comments by a Hacker News user.

Lists unique links, with titles, from pasted web content and exports them as plain text, Markdown or HTML.

Shows when web APIs first shipped in each browser, using MDN's compatibility data.

Makes QR codes for links, text or WiFi logins, with choice of module style, size and colors.

Decodes QR codes from an uploaded image, pasted picture or live webcam feed.

Cuts everything after the question mark from a URL so you can share a clean link without tracking parameters.

Collects every valid HTTP link from pasted HTML into a plain list.

Displays the user agent string your browser sends along with an explanation of what it tells sites.

Lists every thumbnail size YouTube serves for a video URL or ID with copyable links.