Cool Websites — June 22, 2026

A fresh batch of 36 hand-picked, genuinely useful corners of the internet — from privacy tools and OSINT sandboxes to AI research assistants, browser Photoshop, and indie games you've never heard of.

🔐 Security & Privacy

Have I Been Pwned

Troy Hunt's legendary breach database now indexes over 17.6 billion compromised accounts. Enter any email address to instantly see which data breaches exposed it — then set up free alerts so you're notified the moment your address appears in a future leak.

SimpleLogin

Create unlimited email aliases that forward to your real inbox so you never hand out your actual address again. Replies go back through the alias, sites never learn who you are, and killing a spammy alias takes one click. Open source, owned by Proton, free tier available.

Privnote

Write a message, generate a one-time link, and once the recipient reads it the note destroys itself — the server never stores plaintext, and you can optionally password-protect it or set an expiry. Perfect for sending credentials or sensitive snippets without leaving them in Slack history forever.

🕵️ OSINT & Investigation

OSINT Framework

A free, community-maintained tree of hundreds of open-source intelligence resources organized by category: people search, email lookup, domain research, social media, geolocation, and much more. Think of it as the card catalog for the entire OSINT universe — start here when you don't know which tool to reach for.

urlscan.io

Submit any URL and get a sandboxed screenshot, full DOM snapshot, network requests, cookies, TLS details, and threat indicators — all without touching the site yourself. Essential for safely investigating phishing links, sketchy redirect chains, or malware landing pages.

WiGLE

A crowdsourced global database of WiFi networks mapped by latitude/longitude — over 1 billion networks contributed since 2001. Security researchers use it to correlate SSIDs with physical locations; you can search by SSID, BSSID, or area, and even upload your own wardrive data via the Android app. Owners can request removal.

🖥️ IT & Sysadmin Tools

Crontab.guru

The quickest way to decode or compose a cron schedule expression. Type any * * * * * string and it instantly tells you in plain English when the job fires — with a history of recent examples and a random expression generator for testing edge cases. Bookmark it; you'll open it every time you write a cron job.

Regex101

Build, test, and debug regular expressions in your browser with live match highlighting, a full reference sidebar, match breakdown tree, substitution preview, and unit-test panel. Supports PCRE2, JavaScript, Python, and Java flavors, and you can share a permalink to any regex you build.

BGP.Tools

Explore the internet's underlying routing infrastructure — look up any ASN, IP prefix, or domain to see BGP routing data, upstream/downstream peers, near-real-time route changes, and geographic breakdown. Invaluable when diagnosing routing anomalies, tracking down a CDN edge, or just understanding who actually "owns" a subnet.

🤖 AI Tools

NotebookLM

Google's document-grounded AI: upload PDFs, web pages, YouTube transcripts, or Google Docs, and an AI becomes an expert on only that material — it won't hallucinate facts from outside your sources. Free tier includes up to 100 notebooks with 50 sources each; it can even auto-generate a podcast-style audio discussion of your documents.

Phind

An AI search engine tuned specifically for developers — answers come with cited sources, working code snippets, and the model reasons through technical edge cases rather than just pattern-matching. If you spend your day in a terminal or IDE, Phind often gets to a working answer faster than generic LLM chat.

Consensus

Search over 200 million academic papers and get a "Consensus Meter" showing at a glance whether 80% of the evidence agrees or disagrees on a topic. Each result links to the actual paper and quotes the relevant finding — a genuinely useful tool for cutting through pop-science takes.

🎨 Video & Image Tools

Squoosh

Google Chrome Labs' browser-based image compressor processes everything on your device — nothing is uploaded to any server. Drag in a photo, compare codecs side-by-side (WebP, AVIF, MozJPEG, OxiPNG), adjust quality, and download. A 1.4 MB JPEG can come out at 80 KB with nearly invisible quality loss.

Photopea

A full-featured Photoshop-compatible image editor that runs entirely in the browser, free with no login required. It opens PSD, XCF, Sketch, and 40+ other formats, supports layers, masks, adjustment layers, curves, and even has a built-in AI background remover. The closest thing to a free, install-nothing Photoshop that actually exists.

Carbon

Paste code, pick a theme (there are dozens), set your window style, and export a gorgeous shareable image of your code snippet in seconds. Used by developers everywhere for READMEs, social media posts, and presentations. Open source and endlessly customizable.

👨‍💻 Developer Tools

Bundlephobia

Before you npm install that shiny new package, drop its name here and see exactly how many KB it will add to your bundle, how tree-shakeable it is, how long it takes to download over 3G, and what its own dependencies look like. Also accepts an entire package.json for bulk auditing.

Transform.tools

50+ code-format converters in one place: JSON → TypeScript interfaces, SVG → JSX, CSS → Tailwind, GraphQL → TypeScript, HTML → JSX, TOML → JSON, and much more. Open source and works entirely in the browser — paste code on the left, transformed output appears instantly on the right.

roadmap.sh

Community-built, visually interactive learning roadmaps for 25+ developer career paths — Frontend, Backend, DevOps, AI/ML, Android, and more — plus skill-based roadmaps for specific technologies. 358k+ GitHub stars and 2.8 million registered users; each node links to curated resources. The clearest map of "what to learn and in what order" that exists.

🪟 Windows Software

Ninite

Select from 100+ popular Windows apps (browsers, media players, dev tools, utilities), download one installer, and it silently installs every selected app with zero toolbars, bloatware, or "next next next" prompts. Keeps everything updated on re-run. Processes roughly a million installs a day.

PortableApps.com

Over 1,400 portable apps — browsers, editors, security tools, utilities — packaged to run directly from a USB drive or cloud folder without leaving traces on the host machine. OSI-certified open source, no bundleware, 1.2 billion downloads. Essential kit for carrying your tools across machines.

Microsoft PowerToys

25+ free open-source power-user utilities for Windows: FancyZones for window tiling, PowerToys Run for app launching, a system-wide Color Picker, PowerRename for bulk regex renaming, Always on Top, a file preview pane, and much more. Actively developed by Microsoft and community contributors; installs from the Microsoft Store or GitHub.

🐧 Open Source Software

Immich

A self-hosted Google Photos alternative with 90,000+ GitHub stars and one of the fastest-growing self-hosted communities. Full mobile backup (iOS/Android), facial recognition, timeline browsing, albums, map view, and multi-user support — running on your own hardware with your own storage.

Jellyfin

Fully free, fully open-source personal media server for movies, TV shows, music, live TV with DVR, and photos — no subscription, no tracking, no phone-home. Clients exist for every platform (web, Android, iOS, Apple TV, Fire TV, Roku). The volunteer-driven alternative to Plex that doesn't lock features behind a paywall.

Coolify

A self-hostable open-source alternative to Vercel, Heroku, and Netlify — point it at any server (VPS, Raspberry Pi, bare metal), connect your Git repo, and it handles deployments, SSL certificates, databases, backups, and 280+ one-click services with a clean web UI. Free forever as open source, with an optional managed cloud tier.

📚 Learning & Reference

Learn X in Y Minutes

Community-contributed "scenic tours" of 200+ programming languages and tools: each page is a densely commented, runnable code file that teaches the full syntax and idioms of a language in one sitting. Covers everything from Python and Rust to TOML, Git, Make, and lambda calculus. All content is CC-licensed.

Exercism

Practice 83 programming languages through 8,500+ progressively harder coding exercises, with the option to request personal feedback from real volunteer mentors. The in-browser editor means nothing to install, and everything is 100% free — no credit card, no catch. One of the best ways to get fluent in a language you already know the basics of.

Typing.com

A free, structured touch-typing curriculum that goes from "home row" basics through advanced speed training, with games, coding-specific drills, and a full K–12 lesson plan. No account required to start. If you can't type without looking at your hands, this is the 5-10 hours of investment that pays back every single day.

🎮 Games & Interactive

Neal.fun

Thirty-plus delightful interactive browser experiments by designer Neal Agarwal: drag your cursor to draw a perfect circle, craft an infinitely recursive universe in Infinite Craft, survive The Password Game's increasingly absurd rules, launch an asteroid and watch it level cities, or spend Bill Gates' money. A playground with no ads and no logins.

Wikitrivia

A free browser card game that pulls historical events from Wikidata's 100 million+ entries and asks you to place them in chronological order on a timeline. Cards cover everything from the founding of ancient kingdoms to the death of scientists. Endlessly replayable, and a surprisingly effective history lesson.

itch.io

The independent game marketplace with thousands of browser-playable free games, pay-what-you-want solo projects, and regular charity bundles. Filters for "Playable in Browser" + "Free" surface an endless stream of creative experiments — from 10-minute narrative games to full jam entries that rival commercial releases.

✈️ Travel

FlightConnections

An interactive world map of every scheduled direct commercial flight route — 1,162+ airlines, every airport. Click any airport and see at a glance everywhere it flies nonstop; filter by airline, date, price, and aircraft type. Great for discovering that your nearest regional hub actually has a cheap direct flight to somewhere surprising.

Wanderlog

A free collaborative trip-planning app where you build day-by-day itineraries on an integrated map, forward booking confirmation emails to auto-populate reservations, split and track expenses, and share edit access with travel companions. Does in one place what normally requires a spreadsheet, Google Maps, and three group chats.

Rome2Rio

Enter any two points on Earth and get every possible transport combination between them: 53,000+ flight routes, 199,000 train lines, 970,000 bus routes, 13,000 ferry services, driving directions, and bike-share options — all with estimated times and prices. Indispensable for multi-modal trips and for routes where Google Maps only shows you "fly there."

💰 Money & Finance

Unbury.me

A simple, no-signup loan calculator and debt visualizer — enter your balances, interest rates, and monthly payment and it maps out your debt-free date on a timeline. Toggle between avalanche (highest-rate first) and snowball (smallest-balance first) strategies and watch your payoff date shift. Has been quietly doing this since 2011.

Investor.gov Compound Interest Calculator

The SEC's free, no-ads, no-account compound interest calculator — plug in principal, contribution amount, rate, and time horizon and it produces a year-by-year table and chart of your growth. Unglamorous but authoritative; perfect for settling "is it worth maxing out the 401k?" arguments with actual numbers.

Goodbudget

A digital take on the classic envelope budgeting method — allocate your income into spending categories at the start of the month, and Goodbudget shows each "envelope" draining in real time as you log purchases. Syncs across devices so partners can both see and update the same budget. Free plan covers 20 envelopes across two devices.

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36 sites this week. Found something broken or have a site to suggest? Reply to the email.