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App Screenshotchecked Sep 28
appscreenshot.base31.org↗ (opens in a new tab)utilityscreenshottoolsGenerate polished app screenshots for product pages, portfolios, and presentations.
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CompMails
compmails.base31.org↗ (opens in a new tab)emailprivacyutilityUse a disposable inbox for temporary signups and quick online testing.
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Daily Wordlechecked Sep 28
dailywordel.base31.org↗ (opens in a new tab)gamewordpuzzleSolve a fresh daily word puzzle and test your vocabulary.
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Donation
donation.base31.org↗ (opens in a new tab)donationssupportbase31Support the independent tools and experiments hosted by base31.org.
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GitHub Explorer
githubexplorer.base31.org↗ (opens in a new tab)githubdeveloperaicodeBrowse any GitHub repository's files and code, explore a user's repositories, and draft READMEs and docs with AI.
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iframe tester
iframetester.base31.org↗ (opens in a new tab)iframedevTest any url with this tool, iframe testing.
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Image Compressorchecked Sep 28
imagecompressor.base31.org↗ (opens in a new tab)imagecompressresizeutilitytoolCompress and resize images in the browser, with batch processing, before-and-after sizes and no upload.
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Is It Downchecked Sep 26
isitdown.base31.org↗ (opens in a new tab)utilitynetworkstatusCheck whether a website is reachable and verify its current status.
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Is It Takenchecked Sep 25
isittaken.base31.org↗ (opens in a new tab)domainsutilitytoolCheck whether a domain name is available and see registration insights and instant alternatives.
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Joke Generator
jokegenrator.base31.org↗ (opens in a new tab)entertainmentfunutilityGenerate a quick joke whenever you need a little entertainment.
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Password Generatorchecked Sep 24
passwordgen.base31.org↗ (opens in a new tab)securitypasswordutilitytoolGenerate strong random passwords and passphrases, and save them in a vault encrypted with your own master passphrase.
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QR Code Generatorchecked Sep 28
qrgenerator.base31.org↗ (opens in a new tab)qrutilitytoolgeneratorCreate free custom QR codes for links, Wi-Fi, contacts and messages, with PNG and SVG download.
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Share Fileschecked Sep 27
share.base31.org↗ (opens in a new tab)utilityfreeonlinefilesUpload a file and get a shareable link without creating an account.
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Subdomain Finderchecked Sep 26
subdomain.base31.org↗ (opens in a new tab)subdomainutilitytoolFind any domains of any URL.
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Word of the Daychecked Sep 27
wordoftheday.base31.org↗ (opens in a new tab)educationvocabularylearningLearn a new word each day with definitions and example sentences.
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＋Add your own siteUpload your HTML files — we host them here for free, and visitors can browse and vote on your site.↗
Want the full story on any of these? Read the tool guides →
Other cool sites
52 links
Hand-picked corners of the web that live at their own addresses — not made by base31, just worth the trip.
Window Swap↗window-swap.comOpen a window somewhere in the world — views from strangers' homes, submitted by people everywhere.
The Useless Web↗theuselessweb.comA one-button router into the internet's strangest corners. The classic starting point for a pointless adventure.
Neal.fun↗neal.funSpend Bill Gates' money, scale the Space Elevator, dive the Deep Sea — a shelf of the web's best interactive toys.
A Soft Murmur↗asoftmurmur.comMix rain, thunder, waves, fires and coffee shops into a background ambience for working or drifting off.
Radio Garden↗radio.gardenSpin a glowing globe and drop in on live radio stations from almost every town on Earth.
Pointer Pointer↗pointerpointer.comMove your mouse anywhere and a photo of someone pointing at exactly that spot appears. Pointless, perfect.
Zoomquilt↗zoomquilt.orgAn endlessly zooming collaborative painting — keep going deeper and the scene never stops unfolding.
Music for Programming↗musicforprogramming.netHour-long, carefully sequenced mixes designed to sit behind long stretches of focused work.
Httpster↗httpster.netA curated showcase of simply beautiful websites — proof that great design is not the same as heavy design.Neal.fun↗neal.funA collection of beautifully made interactive web experiments, including space visualizations, drawing challenges, and playful simulations.The Useless Web↗theuselessweb.comPress one button to be sent to a random, pointless, strange, and entertaining website.
Cloudhiker↗cloudhiker.netA hand-picked collection of thousands of small independent websites, delivered randomly without feeds or rankings.
Bored Button↗boredbutton.comA single button that launches a new game, mini activity, visual toy, or strange internet experience.
The Secret Door↗thesecretdoor.comOpen a digital door and instantly discover a random image or place from somewhere on the internet.Radio Garden↗radio.gardenExplore a 3D globe and tune into live radio stations from cities all around the world.
Drive & Listen↗driveandlisten.herokuapp.comVirtually drive through cities worldwide while listening to local radio stations and street sounds.
Earth Nullschool↗earth.nullschool.netA mesmerizing live visualization of global wind, ocean currents, weather systems, and air conditions.Pointer Pointer↗pointerpointer.comMove your cursor anywhere on the screen and the site finds a photo of someone pointing directly at it.
Cat Bounce↗cat-bounce.comA completely unnecessary but delightful page filled with endlessly bouncing cats.
Patatap↗patatap.comPress keyboard keys to create colorful animations and musical sounds in a playful audiovisual experience.
Silk↗weavesilk.comCreate glowing symmetrical digital art by moving your cursor across the screen.
This Is Sand↗thisissand.comPour colored digital sand onto the screen to create layered landscapes and abstract artwork.
Find the Invisible Cow↗findtheinvisiblecow.comUse increasingly loud sound cues to find an invisible cow hidden somewhere on the page.A Soft Murmur↗asoftmurmur.comMix rain, thunder, wind, waves, café noise, and other ambient sounds into a custom background soundscape.
WindowSwap↗window-swap.comLook through video windows submitted by people around the world and experience views from their homes.Zoomquilt↗zoomquilt.orgAn endlessly zooming collaborative painting — keep going deeper and the scene never stops unfolding.
The Zen Zone↗thezen.zoneA collection of calming, playful, and visually interactive experiences designed for a short mental break.
The Pudding↗pudding.coolA studio of outstanding visual stories and interactive data journalism with strong design and animation.
Information Is Beautiful↗informationisbeautiful.netA collection of visualizations that turn complex facts, comparisons, and datasets into engaging graphics.
The True Size Of...↗thetruesize.comDrag countries around the globe to see their true relative size without common map-projection distortion.
OneZoom↗onezoom.orgExplore the entire tree of life through a smooth zoomable map of species and evolutionary relationships.
Scale of the Universe 2↗scaleofuniverse.comScroll from the smallest known physical scales to the largest structures in the observable universe.
Library of Babel↗libraryofbabel.infoA surreal digital library inspired by Borges that contains every possible combination of text.
Museum of Endangered Sounds↗museumofendangeredsounds.comA nostalgic archive of sounds made by old technology, including dial-up modems, floppy disks, and startup chimes.
FutureMe↗futureme.orgWrite a letter or email to your future self and schedule it to be delivered on a date you choose.
Awwwards Interactive↗awwwards.comA curated gallery of award-winning interactive websites and premium web-design inspiration.
CSS Zen Garden↗csszengarden.comA classic demonstration of how dramatically different designs can be created using the same HTML and different CSS.
Coolors↗coolors.coA fast color-palette generator for finding polished color combinations for websites, brands, and interfaces.
Khroma↗khroma.coAn AI-powered color tool that learns your preferences and generates personalized color palette ideas.
Type Scale↗typescale.comA typography tool for creating balanced font-size scales and type systems for web projects.
Spline↗spline.designA browser-based design tool for creating interactive 3D scenes, objects, and animations for the web.
Sketchfab↗sketchfab.comA large online library of interactive 3D models, artwork, scenes, and creative projects.
Cameron's World↗cameronsworld.netA colorful internet-art experience built from archived GeoCities pages and early-web design aesthetics.
Little Alchemy 2↗littlealchemy2.comCombine simple elements such as water, fire, earth, and air to discover hundreds of new objects and ideas.
GeoGuessr↗geoguessr.comA geography game where you identify locations around the world using clues from Street View.
MapCrunch↗mapcrunch.comGet dropped into a random Google Street View location anywhere in the world.
WikiRoulette↗wikiroulette.coDiscover random Wikipedia articles and fall into unexpected learning rabbit holes.
Quick, Draw!↗quickdraw.withgoogle.comDraw an object in a few seconds while Google's neural network tries to recognize what you are sketching.
Akinator↗en.akinator.comThink of a real or fictional character while the genie asks questions and attempts to guess who it is.Infinite Craft↗neal.funCombine words and concepts to discover increasingly unexpected creations in an endless crafting game.
2048↗play2048.coA deceptively simple sliding-tile puzzle where you combine matching numbers to reach the 2048 tile.
Fallen London↗fallenlondon.comA rich browser-based narrative game set in a dark, surreal underground Victorian world.
Cool APIs
63 links
Free public APIs worth building with — no key hunting, no paid tier to start, just an endpoint and its docs.
Public APIs↗github.comThe community's master list of free APIs, sorted by category — the first place to look when you need a service for a side project.
Open-Meteo↗open-meteo.comFree weather forecasts and historical climate data for any coordinate, with no API key and no signup.
NASA Open APIs↗api.nasa.govAstronomy Picture of the Day, Mars rover photos and near-Earth objects, all on a demo key that works out of the box.
PokéAPI↗pokeapi.coEvery Pokémon, move, ability and sprite in one free REST API — a favourite first API for learning to fetch data.
REST Countries↗restcountries.comFlags, capitals, currencies, languages and populations for every country on Earth, as clean JSON.
TheCatAPI↗thecatapi.comRandom cat photos, breed lookups and vote endpoints — a light-hearted way to test image handling.
Dog CEO↗dog.ceoRandom dog pictures by breed, hosted over HTTPS with no key required and no rate-limit drama.
Open Library↗openlibrary.orgSearch millions of book records, covers and authors from the Internet Archive's open catalogue.
Wikipedia REST API↗mediawiki.orgArticle summaries, random pages, page images and full-text search straight from Wikipedia.
Datamuse↗datamuse.comA word-finding API for rhymes, synonyms and related terms — a poet's, or a word game's, toolbox.
Free Dictionary API↗dictionaryapi.devDefinitions, phonetics and audio pronunciations for English words, with no key and no signup.
Frankfurter↗frankfurter.devReference exchange rates from the European Central Bank, published daily and served as simple JSON.
CoinGecko↗coingecko.comLive prices, market caps and historical charts for thousands of cryptocurrencies on a free tier.
ExchangeRate.host↗exchangerate.hostCurrency conversion and historical rates with a free key that never asks for a credit card.
The Color API↗thecolorapi.comTurn a hex value into names, harmonies and schemes, or generate a full palette from a single colour.
DiceBear↗dicebear.comGenerate identicon-style profile pictures as SVG or PNG straight from a URL, in dozens of styles.
Lorem Picsum↗picsum.photosPlaceholder images at any size, with blur and grayscale options, from nothing but a URL.
Unsplash API↗unsplash.comSearch and download millions of free high-resolution photographs, with attribution built into the rules.
Pexels API↗pexels.comFree stock photos and videos through a simple keyed REST API with a generous monthly quota.
Random User Generator↗randomuser.meFake user profiles with names, photos and addresses — perfect for seeding a UI with believable test data.
JSONPlaceholder↗jsonplaceholder.typicode.comFake posts, comments, todos and users for prototyping a front end before the real backend exists.
httpbin↗httpbin.orgA tiny service that echoes your request back — headers, redirects, auth, cookies and all.
Open Trivia DB↗opentdb.comThousands of multiple-choice questions with categories and difficulty, free for quizzes and bots.
TheMealDB↗themealdb.comRecipes, ingredients and meal photos by category, cuisine, or a single random pick.
TheCocktailDB↗thecocktaildb.comCocktail recipes, glassware and ingredient images for a home-bar app or a quick lookup.
Open Food Facts↗world.openfoodfacts.orgA crowd-sourced database of packaged food: barcodes, ingredients, nutrition and label photos.
Open Brewery DB↗openbrewerydb.orgA free, key-less directory of breweries searchable by city, state, country and type.
Art Institute of Chicago↗api.artic.eduThe museum's public collection — artworks, artists, images and descriptions — as open data.
The Met Collection↗metmuseum.github.ioSearch the Metropolitan Museum's objects and pull high-resolution public-domain images.
OpenSky Network↗openskynetwork.github.ioLive aircraft positions and flight states collected by a volunteer network of receivers.
Where the ISS at?↗wheretheiss.atThe International Space Station's current latitude, longitude and altitude, refreshed every second.
USGS Earthquake Feed↗earthquake.usgs.govQuery real earthquakes by magnitude, place and date range from the USGS catalogue.
Nager.Date↗date.nager.atPublic holidays for over a hundred countries, by year, as plain JSON.
WorldTimeAPI↗worldtimeapi.orgThe current time, timezone and UTC offset for a place or an IP address, with no key.
Zippopotam.us↗api.zippopotam.usPostal code lookups that return the places, coordinates and timezone hiding behind them.
Nominatim↗nominatim.orgOpenStreetMap's geocoder: turn an address into coordinates, or coordinates back into an address.
Wayback Machine API↗archive.orgAsk whether a URL has been archived, and get back the closest snapshot to any date.Hacker News API↗github.comStories, comments and user profiles from Hacker News — read-only, key-free and instant.
GitHub REST API↗docs.github.comRepositories, issues, releases, commits and users — the API behind most developer dashboards.
Lichess API↗lichess.orgGames, puzzles, ratings and live board streams from the free open-source chess server.
Deck of Cards↗deckofcardsapi.comShuffle, draw and deal a virtual deck — the simplest way to add cards to a side project.
Rick and Morty API↗rickandmortyapi.comCharacters, locations and episodes from the show, with images and filters on every endpoint.
Star Wars API↗swapi.devThe classic Star Wars dataset — people, planets, films and starships, all with stable IDs.
Studio Ghibli API↗ghibliapi.vercel.appFilms, characters, locations and species from Studio Ghibli's catalogue of animated features.SpaceX API↗github.comLaunches, rockets, capsules and Starlink data compiled from public sources and kept current.
PubChem↗pubchem.ncbi.nlm.nih.govChemical compounds, properties and structures from the NIH's enormous public database.
World Bank Data↗datahelpdesk.worldbank.orgDevelopment indicators for every country going back decades, as free and open data.
Hugging Face Inference↗huggingface.coRun hosted open-source models — text, images and audio — from a single REST call.
LibreTranslate↗libretranslate.comOpen-source machine translation you can call from an app, or self-host and run for free.
IP-API↗ip-api.comLook up a visitor's country, city, ISP and coordinates from their IP address.
ipwho.is↗ipwho.isFree IP geolocation with no key, no signup and a JSON-first response built for browsers.
QR Code API↗goqr.meGenerate QR codes as PNG, SVG or EPS just by building a URL — no key and no server needed.
RSS to JSON↗rss2json.comTurn any RSS feed into JSON so a browser can read it without tripping over CORS.
Agify↗agify.ioGuess a person's age from their first name, with country-level breakdowns and sample sizes.
Nationalize↗nationalize.ioGuess the likely nationality behind a first name, returned with probability scores per country.
Genderize↗genderize.ioPredict the gender associated with a first name, from a large aggregated international dataset.
Cat Facts↗catfact.ninjaA random cat fact on every request, plus breed lists and pagination for browsing.
Useless Facts↗uselessfacts.jsph.plRandom trivia delivered as JSON or plain text, with a daily-fact endpoint for a steady drip.
Advice Slip↗api.adviceslip.comRandom pieces of advice, searchable by word, each with a stable slip ID you can cite.
ZenQuotes↗zenquotes.ioInspirational quotes and a today's-quote endpoint, free for non-commercial projects.
Yes No↗yesno.wtfAnswers yes, no or maybe, each with an animated GIF to match. That is the whole API.
Kanye Rest↗api.kanye.restOne random Kanye West quote per request, plus an optional timestamp parameter.
Fruityvice↗fruityvice.comNutrition facts for dozens of fruits, each filed under a genus, family and order.
about the directory
A small home for the interesting internet.
base31.org is an independent collection of personal sites, experiments, tools, and other projects worth exploring. It is a hand-built alternative to noisy app lists: every link leads to a real project with something to see or use.
Looking for Base44? base31 is a separate, independent project and is not affiliated with Base44. Start here for a different kind of website directory: slower, stranger, and made for curious people.
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base31.org is an independent directory of cool sites, fun websites, creative web projects and useful online tools. Every entry is a real, working site you can open right now — no store listings and no dead links.
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By hand. Each site is opened and checked, then given a short description and a few tags. Community submissions go through the same bar: the site has to have something to look at or something you can use.
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