50 powerful websites you should know
The "powerful websites you should know" from those reels, all in one place. Each one does something you would expect to need expensive software, a lab or a team for, and does it in a browser tab.
You can split a song into vocals and instruments, print a city in 3D, simulate a circuit, fly a plane or ask a maths engine anything. Most are free.
Updated · 50 sites · hand-checked
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1. Google Earth
The whole planet in 3D in a browser tab. Fly through cities, take the guided Voyager stories or measure anything.
- Maps & Earth
- Free
- earth.google.com
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2. F4map
OpenStreetMap rendered as a 3D city with buildings, trees and moving shadows. Fly anywhere in the world.
- Maps & Earth
- Free
- demo.f4map.com
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3. CADMAPPER
Select any area in the world and download its buildings, roads and terrain as CAD files for architecture models.
- Maps & Earth
- Freemium
- cadmapper.com
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4. ShadeMap
Every mountain, building and tree shadow on earth, simulated for any date and time. Find the sunny café terrace or the shady campsite.
- Maps & Earth
- Freemium
- shademap.app
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5. Wolfram Alpha
A computational knowledge engine that answers questions with worked steps rather than links.
- Learn
- Freemium
- wolframalpha.com
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6. Vocal Remover
Drop in a song and get the vocals and the instrumental as separate tracks. Also has pitch, tempo and key tools for karaoke and practice.
- Music & Audio
- Freemium
- vocalremover.org
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7. Cleanup.pictures
Paint over an object in a photo and it disappears, with the background plausibly filled in.
- Everyday Tools
- Freemium
- cleanup.pictures
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8. Animated Drawings
Upload a child's drawing of a person or creature and it gets a skeleton, then walks, jumps and dances. A research demo from Meta.
- Fun & Weird
- Free
- sketch.metademolab.com
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9. Tinkercad
Snap shapes together into 3D models, wire up simulated Arduino circuits or build with code blocks. The friendliest way into CAD.
- Design & Type
- Free
- tinkercad.com
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11. PCBX Simulator
Build Arduino circuits on a 3D breadboard in the browser, wire up displays and LEDs, and run real code against them.
- Learn
- Free
- pcbx.com
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12. GeoFS
Fly anything from a Cessna to an airliner over real satellite imagery of the whole planet, in a browser tab, alongside other pilots online.
- Games & Play
- Freemium
- geo-fs.com
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13. Spline
Model, animate and add interactions to 3D scenes in the browser, then embed them on a website like an image.
- Design & Type
- Freemium
- spline.design
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14. 3DLogoLab
Drop in a flat logo or SVG and get a spinning 3D version with chrome, glass or gold materials, ready to export as a video.
- Design & Type
- Freemium
- 3dlogolab.io
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15. TopoExport
Draw a box on the map and download that terrain as a 3D model or contour lines, ready for 3D printing or CAD.
- Maps & Earth
- Freemium
- app.topoexport.com
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16. Stowaway
Look up and see what's actually overhead: planes, satellites and stars drawn in 3D exactly where they are in your sky right now.
- Maps & Earth
- Free
- stowaway.live
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17. World Monitor
Ships, jets, air-raid sirens, undersea cables and markets layered on one live map of the world's raw signals.
- Maps & Earth
- Free
- worldmonitor.app
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18. Playphrase.me
Type any phrase and watch a montage of film scenes where someone says it. Great for language learners and settling quote arguments.
- Music & Audio
- Freemium
- playphrase.me
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19. trace.moe
Drop in a screenshot from an anime and it tells you the show, the episode and the exact second it is from.
- Everyday Tools
- Open source
- trace.moe
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20. Wayback Machine
Nine hundred billion saved web pages. The reason the internet has a memory at all.
- Read & Archive
- Donation
- web.archive.org
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22. TinyWow
Hundreds of single-purpose PDF, image and video tools behind one search box, free and without an account.
- Everyday Tools
- Free
- tinywow.com
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23. 123apps
A shelf of small browser tools for cutting audio, trimming video, recording the screen and converting PDFs.
- Everyday Tools
- Freemium
- 123apps.com
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24. Keepa
Price history charts for nearly every Amazon product, so you can tell a real deal from a fake discount and set drop alerts.
- Everyday Tools
- Freemium
- keepa.com
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25. Can You Run It
Pick a game and it checks your PC against the minimum and recommended specs, then tells you what to upgrade.
- Everyday Tools
- Free
- systemrequirementslab.com
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26. PhET Interactive Simulations
Hundreds of physics, chemistry and biology simulations you can poke at — drag a mass onto a spring, mix a solution, build a circuit and watch it burn out.
- Science & Space
- Free
- phet.colorado.edu
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27. Javalab
Hundreds of small, clear simulations of physics, chemistry and earth science, from pendulums to tides.
- Science & Space
- Free
- javalab.org
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28. Anatomy Atelier
Explore the human body in 3D, organ by organ, with hotspots and short lessons on what each part does.
- Science & Space
- Free
- anatomyatelier.org
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29. Eye Atlas
An interactive 3D model of the human eye. Orbit it, peel it apart layer by layer, slice it in half and see what goes wrong in common conditions.
- Science & Space
- Free
- eye-anatomy-delta.vercel.app
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30. Car Anatomy
An interactive 3D car you can take apart: engine, gearbox, brakes and suspension, each explained in plain English as it moves.
- Learn
- Free
- underthehood.online
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31. NB Chemistry Lab
A virtual chemistry lab in 3D: pick up glassware, mix reagents and watch the reactions happen without breaking anything.
- Learn
- Freemium
- chemistry-en.nobook.com
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32. OpenGridWorks
An interactive map of the power grid: every plant by fuel type, plus transmission lines and substations.
- Maps & Earth
- Free
- opengridworks.com
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33. Namelix
Type a few words about a project and get pages of short, brandable names with domain availability and a logo sketch.
- Everyday Tools
- Free
- namelix.com
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34. Image to ASCII
Turn any image into ASCII art with sliders for character count, contrast and edge detection, then copy it as text.
- Design & Type
- Free
- asciiart.eu
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35. Flourish
Paste in a spreadsheet and get an animated, interactive chart or map, including the famous racing bar charts.
- Design & Type
- Freemium
- flourish.studio
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36. iFixit
Step-by-step photo guides for opening and repairing almost anything, from phones to washing machines, written by a community of fixers.
- Everyday Tools
- Free
- ifixit.com
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37. ManualsLib
Millions of user manuals for appliances, cars, cameras and gadgets, searchable by model and readable online.
- Read & Archive
- Free
- manualslib.com
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38. Supercook
Tick off what is in your fridge and cupboard and it finds recipes you can make right now without going shopping.
- Everyday Tools
- Free
- supercook.com
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39. MuscleWiki
Click a muscle on the body map and get exercises for it, each with a looping video of how to do it properly.
- Everyday Tools
- Freemium
- musclewiki.com
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40. Hero Forge
Build your tabletop character as a 3D miniature, from pose and armour to the shape of the nose. Designing is free; ordering a print isn't.
- Games & Play
- Freemium
- heroforge.com
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42. DOF Simulator
Pick a camera, lens, aperture and distance and watch the depth of field and background blur change on a sample photo.
- Learn
- Free
- dofsimulator.net
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43. Meta AI Demos
Try Meta's research demos in the browser: cut objects out of any video, or turn a single photo into a 3D model.
- Fun & Weird
- Free
- aidemos.meta.com
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44. Stella Nova
A space colony game whose lab doubles as a playground of live physics simulations, from orbits to black holes and wormholes.
- Science & Space
- Free
- davesgames.io
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45. Electude Simulator Challenge
Diagnose a broken engine with a virtual multimeter and wiring diagrams, the way trainee mechanics do. Scored against the clock.
- Learn
- Free
- simulator.electude.com
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46. Fingerprint
Type a username, email or phone number and see which of 700+ platforms it turns up on. A sobering look at your footprint.
- Everyday Tools
- Freemium
- fingerprint.to
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47. Max Intel
A free OSINT toolkit in the browser: username, email and phone lookups, domain recon and image forensics in one place.
- Everyday Tools
- Free
- maxintel.org
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48. NukeSimulation
Drop a nuclear weapon on any city in 3D and see the fireball, blast rings, heat and fallout plume. Sobering and clearly explained.
- Science & Space
- Free
- nukesimulation.com
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49. Thiings
Over ten thousand 3D object icons in one cheerful style, free to search and download.
- Design & Type
- Free
- thiings.co
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50. VibeSail
A 3D sailing simulator where trimming the sails actually matters. Daily races, real coastlines and short tutorials on how wind works.
- Games & Play
- Free
- vibesail.com
Want more than 50?
This list is one slice of a directory of 478 websites. Search, filter by category or tag, or shuffle the lot.
Explore the full directoryQuestions
What are the most powerful websites to know?
Google Earth and F4map for exploring the planet in 3D, Wolfram Alpha for computing answers, Vocal Remover for splitting songs, and Tinkercad and Wokwi for designing and simulating hardware.
Do I need to pay or install anything?
No install. Everything runs in a browser. Most are free, and the rest have free tiers. Each entry shows its price.
How is this different from the useful websites list?
The useful list is everyday helpers like PDF and image tools. This list is the "how is this even possible in a browser" kind.
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