skyzh.github.io
A web page that generates Zoom meeting URLs from a meeting ID and optional password and name. It offers PC, mobile and redirect URL options, and notes a known Firefox issue with encoded URLs.
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lewdev.github.io
A browser-based tool that generates HTML meta tags for single-page apps, using Open Graph and Twitter web standards. It also produces social media posts and stores the last generated form in localStorage. Inputs cover title, description, keywords, URL, image URL, author and Twitter username.
projectwallace.com
Project Wallace is a web-based CSS analyzer that examines stylesheets for complexity, specificity, performance and design tokens. Users paste a URL or raw CSS to receive a full analysis, a quality score, a design token audit and a custom property inspector, plus a cascade layer visualizer. Standalone tools include a CSS prettifier, minifier, diff viewer and specificity calculator.
dfir.blog
DFIR tool for parsing URLs, timestamps, IDs, and encoded values into readable investigation clues.
val.town
Val Town is a platform for deploying code to live URLs. It supports cron jobs, REST APIs, webhooks, email, SQLite data storage, npm and Deno modules, and generating images and PDFs. A CLI allows editing code locally and deploying changes instantly, and AI coding tools can be used with it.
anvil.works
Anvil is a Python-based drag-and-drop web app builder. It provides a visual designer, Python in the browser and on the server, and one-click deployment. Apps are automatically hosted, and deployment environments map a URL or Uplink key to a version of the app with its configuration. Apps can be exported from the cloud editor and hosted on a computer using the open-source Anvil App Server.
godbolt.org
Compiler Explorer is an interactive online compiler that shows the assembly output of compiled C++, Rust, Go and other code. It offers configurable compilers and instruction set filters, shareable URLs, local file loading, and optional AI explanations that users can disable with a no-ai directive.
contentdrips.com
An AI social media content creation tool that generates on-brand posts, graphics and carousels from a topic, blog URL or video, writes captions, and schedules publishing to LinkedIn and Instagram. It offers free templates, a free plan and a no-login option to try.
cosmos-cloud.io
Cosmos Cloud is a self-hosted platform for running apps and services at home or in a business. It includes a reverse proxy, automatic HTTPS, SmartShield, a built-in VPN and backups. It can run as a standalone service or as a Docker container, and documentation covers installation, apps, URLs, users, backups, domains and HTTPS, Constellation VPN and storage.
diffshub.com
DiffsHub is a browser-based viewer for code changes from public GitHub diff and patch URLs. It renders pull requests, comparisons, commits, diffs and patches in a virtualized interface, and can be opened by replacing github.com in a URL with diffshub.com. Optional fine-grained or classic GitHub tokens, stored in localStorage, allow viewing private diffs. Large comparisons may crash mobile browsers.
favicon-hash.kmsec.uk
A tool that generates favicon hashes for Shodan hunting. It retrieves a favicon from a URL or uploaded file and returns JSON with the location, content-type, favicon hash, md5 and sha256. The hash is a MurmurHash3 value computed over a modified base64 encoding, as used by Shodan. Requests run on Cloudflare Workers, with limitations on domains, certificates and ports.
freedns.afraid.org
FreeDNS is a free DNS hosting service that lets users manage their own domain, offering dynamic DNS and static DNS services. Users can also create hosts under other hosted domains with the domain owner's consent. It supports subdomain and domain hosting, backup DNS, reverse IPv6 DNS hosting and URL redirection.
icon.horse
Icon Horse fetches favicons for any website from a single URL usable in an img tag. It offers sensible fallbacks when no icon exists and caches icons for speed. A free Hobby plan allows up to 1,000 icons per month without an account.
jsonhero.io
JSON Hero is a web-based JSON viewer that presents JSON files in a UI with extra features. It infers what strings represent, such as images, dates, colors, URLs and videos, shows related values for fields, and generates an inferred JSON schema. It supports searching the whole file and sharing documents, and is open source.
localhost.run
localhost.run connects web applications running on a computer to the internet using the SSH client already installed on major operating systems, with no download or signup required for free domains. It supports custom domains, automatic TLS certificates for HTTPS, and sharing URLs to show clients work or access a local application from another device.
ngrok.com
ngrok is developer infrastructure that routes and secures traffic to apps, APIs and AI models wherever they run, from localhost to production. It offers an AI Gateway, a gateway to services running anywhere, and localhost sharing. It provides a REST-style API at https://api.ngrok.com, plus client libraries, a CLI and a Terraform provider. A guide covers exposing a local MCP server with a stable public HTTPS URL secured by Traffic Policy.
picsum.photos
Lorem Picsum provides placeholder photos. Adding an image size to the URL returns a random image, and options allow a specific image, a seeded random image that stays the same, grayscale and blur. Multiple options can be combined, and .jpg or .webp file endings can be added. Endpoints list images and return details about a specific image.
placeholder.pics
A service that generates placeholder images for designs as sub-kilobyte Scalable Vector Graphics (SVG). Image URLs define size, colours, and an optional short label, and images can be requested in any size or colour.
redirect.name
A DNS-based URL redirection service. Two DNS records describe a redirect: a CNAME or A record points the hostname at the service server, and a TXT record gives the redirect rule. Rules support permanent and temporary redirects, path matching and wildcards, and destinations can use http, https, ftp, mailto, magnet or absolute paths. HTTPS certificates are issued automatically by Let's Encrypt.
responsivetesttool.com
ResponsiveTestTool is a free web tool for previewing any website across mobile, tablet, desktop and TV screen sizes. Users paste a URL to see how the site renders on different devices without signing up.
resttesttest.com
A simple web page for testing APIs. Users specify an HTTP method, URL and parameters and click to send an Ajax request. The page requires a browser with HTML5 support.
spdx.org
The SPDX License List is part of the SPDX Specification and lists commonly found licenses and exceptions used in free and open or collaborative software, data, hardware or documentation. Each entry includes a standardized short identifier, full name, license text and a canonical permanent URL. License Exceptions are used with the "WITH" license expression operator.
svgx.app
SVGX is a free desktop SVG icon and asset manager for Mac and Windows. It searches SVG icons across nested folders, previews and zooms files, edits markup inline, and offers dark mode. It copies markup or URL-encoded code, generates background-image CSS, previews background repeat values, and optimizes SVGs with SVGO. It includes recents, bookmarks, and export to SVG or PNG.
blog.uncensoreddns.org
UncensoredDNS lists public DNS servers, including an anycast address and a unicast node hosted in Copenhagen, Denmark. The listed servers listen on port 853 for DNS-over-TLS and port 443 for DNS-over-HTTPS. The page provides DNS-over-HTTPS URLs, IPv4 and IPv6 addresses, and TLS public keys for the servers.