35 hidden online treasures, unveiled by @lucasweb
@lucasweb unveils a hidden online treasure every day in short videos on Instagram and TikTok: small, clever and strange websites that never show up in a search.
This is the collection to come back to after the reel has scrolled away. Every treasure is linked, described and checked by a person.
Updated · 35 sites · hand-checked
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1. Chemical Equations Online
Type the reactants and it predicts the products and balances the equation, with the steps shown.
- Learn
- Free
- chemequations.com
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2. Excalidraw
A hand-drawn-feeling virtual whiteboard. Diagrams that look deliberately rough, shareable in one link.
- Design & Type
- Open source
- excalidraw.com
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3. tixy.land
A 16 by 16 grid of dots driven by one line of JavaScript. Change the formula and the grid comes alive. Tiny, endlessly fiddly.
- Fun & Weird
- Free
- tixy.land
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4. musicForProgramming();
A long-running series of mixes selected specifically for staying in flow. No talking, no ads.
- Music & Audio
- Free
- musicforprogramming.net
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5. 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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6. Regex Crossword
Crossword puzzles whose clues are regular expressions, starting gentle and ending somewhere near cruel. The most painless way to actually learn the syntax.
- Games & Play
- Free
- regexcrossword.com
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7. endless.horse
Scroll down to see the horse's legs. Keep scrolling. One of the internet's most committed jokes.
- Fun & Weird
- Free
- endless.horse
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8. JSON Crack
Paste JSON, YAML or CSV and watch it explode into an interactive node graph you can actually read.
- Developer
- Freemium
- jsoncrack.com
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9. 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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10. Jackson Pollock
Move your mouse and paint drips across the screen, faster for thinner lines. Click to change colour. An internet art piece from 2003 that still works.
- Fun & Weird
- Free
- jacksonpollock.org
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11. Grid Garden
The same trick as Froggy, but for CSS grid. Water your carrots with grid-column-start.
- Learn
- Open source
- cssgridgarden.com
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12. 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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13. Agar.io
Be a cell, eat smaller cells, avoid bigger ones. The game that started the whole .io genre is still running.
- Games & Play
- Free
- agar.io
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14. Radio Garden
Spin a globe and listen to live local radio from anywhere on earth. The best map on the internet.
- Music & Audio
- Free
- radio.garden
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15. TypingBird
Typing lessons and arcade-style games that build speed and accuracy, gentle enough for kids.
- Learn
- Free
- typingbird.com
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16. Cat Bounce
Physics-enabled cats fall from the top of the screen. You can throw them. That is all.
- Fun & Weird
- Free
- cat-bounce.com
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17. Floor796
A huge animation scene with many references to memes, games, films, series, anime, music groups
- Fun & Weird
- Free
- floor796.com
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18. delphitools
Small everyday tools for images, text and colour that run entirely in your browser. No logins and no data collection.
- Everyday Tools
- Free
- delphi.tools
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20. Little Alchemy 2
Start with air, earth, fire and water and combine them into hundreds of things, one discovery at a time. A calm puzzle you keep coming back to.
- Games & Play
- Free
- littlealchemy2.com
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21. IsThereAnyDeal
Track PC game prices across dozens of stores, with price history and alerts for when something hits a new low.
- Everyday Tools
- Free
- isthereanydeal.com
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22. make 8-bit art!
A cheerful little pixel-art canvas by Jenn Schiffer. Pick a colour, pick a brush size, draw, save as PNG.
- Design & Type
- Open source
- make8bitart.com
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23. Lobsters
A smaller, invite-only, tag-driven link aggregator with a notably high signal to noise ratio.
- Read & Archive
- Open source
- lobste.rs
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24. Quick, Draw!
You have twenty seconds to draw a prompt while a neural network guesses out loud. Then see how millions of others drew the same thing.
- Games & Play
- Free
- quickdraw.withgoogle.com
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25. Compiler Explorer
Type code on the left, watch the assembly appear on the right, colour-matched line by line, across dozens of compilers. The fastest way to see what yours actually does.
- Developer
- Open source
- godbolt.org
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26. PaperMe
Make and print any kind of paper: lined, dotted, isometric, Cornell notes, guitar tabs or calligraphy grids, with every size and spacing adjustable.
- Everyday Tools
- Free
- paperme.pixzens.com
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29. Hordes.io
A full 3D MMORPG that runs in a browser tab. Pick a class, party up and fight in huge faction battles.
- Games & Play
- Free
- hordes.io
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30. LottieFiles
A huge library of small vector animations, free to use, with an editor to recolour them and export for web or apps.
- Design & Type
- Freemium
- lottiefiles.com
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31. AutoDraw
Scribble a lopsided bicycle and a neural net offers clean drawings of bicycles by real illustrators to swap in. A Google experiment.
- Fun & Weird
- Free
- autodraw.com
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32. SVG Repo
Half a million free SVG icons and vectors, searchable, editable in the browser and downloadable without an account.
- Design & Type
- Free
- svgrepo.com
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33. Bartosz Ciechanowski
Long, gorgeous interactive essays explaining how gears, cameras, GPS and light actually work.
- Learn
- Free
- ciechanow.ski
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34. Scale of the Universe
Zoom continuously from the Planck length to the observable universe. Still stunning years later.
- Science & Space
- Free
- scaleofuniverse.com
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35. DH Tools
46+ free online tools: PDF compressor, photo background remover, AI OCR table extractor, code formatter.
- Everyday Tools
- Freemium
- denizlihub.com
Want more than 35?
This list is one slice of a directory of 481 websites. Search, filter by category or tag, or shuffle the lot.
Explore the full directoryQuestions
What websites does @lucasweb show in their videos?
Hidden gems: little-known websites that are useful, beautiful or just delightful. This page lists them with a link and a short description for each.
Do I need an account to use them?
Almost never. They open in a browser tab, and any that charge for something are labelled with their price.
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