Link Preview

An API for getting near perfect link preview data.

Works with multiple fallbacks, such as stealth emulation of a browser + fetching images by search.

API built on Next.js project bootstrapped with create-next-app. Can be easily used in any other Node.js enviroments (NOT serverless - see serverless issues).

Demo - Try it out!

Article - Code Explained

Usage

For link previews, make GET requests to /api/link-preview?url=

Requires "url" parameter to fetch link preview.

Optional boolean parameters "stealth", "search", "validate" (all default to true):

1. "stealth" - includes stealth browser emulation (longer fetch but very accurate results)
2. "search" - includes bing search images (longer fetch but multiple images)
3. "validate" - includes "top" image that is validated (longer fetch but ensures image src exists and loads)

For Bing Search to work you will need the following enviroment variable: AZURE_BING_SEARCH_KEY, see Bing Image Search API.

Example Link Preview

Link preview for https://www.youtube.com/

Preview route: https://favorited-link-preview.herokuapp.com/api/link-preview?url=https://www.youtube.com/

Result:

{
  "errors": [
    null
  ],
  "success": true,
  "result": {
    "siteData": {
      "url": "https://www.youtube.com/",
      "title": "YouTube",
      "favicon": "https://www.youtube.com/s/desktop/6b6f031c/img/favicon.ico",
      "description": "Enjoy the videos and music that you love, upload original content and share it all with friends, family and the world on YouTube.",
      "image": "https://www.youtube.com/img/desktop/yt_1200.png"
    },
    "imageSearch": "YouTube",
    "imageResults": [
      "https://i.pinimg.com/736x/b6/3f/a4/b63fa416051653ae9cc944b67e559355--youtube-logo-social-media-marketing.jpg",
      "https://freepngimg.com/download/youtube/24980-9-youtube-transparent-background.png",
      "https://i.pinimg.com/736x/b6/3f/a4/b63fa416051653ae9cc944b67e559355--youtube-logo-social-media-marketing.jpg",
      "http://cdn.osxdaily.com/wp-content/uploads/2018/08/play-youtube-video-background-iphone.jpg",
      "https://trcmedia.org/media/1508/youtube-originals.jpg",
      "https://freepngimg.com/download/youtube/24980-9-youtube-transparent-background.png",
      "https://clipground.com/images/youtube-music-logo-png-2.png",
      "http://cdn2.computeridee.nl/articles/Youtube.png",
      "https://www.buysocialbuzz.com/wp-content/uploads/2018/10/youtube-logo.png",
      "https://img1.cgtrader.com/items/1026261/696391c77b/youtube-logo-3d-model-low-poly-max-obj-mtl-3ds-fbx-c4d-ma-mb.jpg",
      "http://cdn.osxdaily.com/wp-content/uploads/2018/08/play-youtube-video-background-iphone.jpg",
      "https://yt3.ggpht.com/a-/AAuE7mBc4ZIdvvJdkoMJnVhED2Uzxllm3dtpgd0GEw=s900-mo-c-c0xffffffff-rj-k-no",
      "https://cliply.co/wp-content/uploads/2019/04/371903520_SOCIAL_ICONS_YOUTUBE.png",
      "http://www.h3xed.com/blogmedia/youtube-thumb.png",
      "https://www.thegadgethelper.com/wp-content/uploads/2020/04/youtube-com-activate.png",
      "https://trcmedia.org/media/1508/youtube-originals.jpg",
      "https://www.magneticmag.com/.image/t_share/MTM0NDIyOTg3MTcxNDgxNjEw/youtube_music_service_concept_logojpg.jpg",
      "https://www.freeiconspng.com/uploads/image-youtube-icon-9.png",
      "https://www.iconpacks.net/icons/2/free-youtube-logo-icon-2431-thumb.png",
      "https://yt3.ggpht.com/a/AATXAJwRo5CFo9_WXrjTw19ddoEKN-4XZCJn0jkaBg=s900-c-k-c0xffffffff-no-rj-mo",
      "https://clipground.com/images/youtube-music-logo-png-2.png",
      "http://www.newdesignfile.com/postpic/2010/04/youtube-logo-transparent_306220.png",
      "https://cdn.wccftech.com/wp-content/uploads/2015/10/YouTube_Play.png",
      "https://cloudfront.bernews.com/wp-content/uploads/2016/01/youtube-icon-generic-322141-2.png",
      "https://images.techhive.com/images/article/2017/03/youtube-music-videos-100716013-orig.jpeg",
      "https://clipartart.com/images/youtube-subscribe-button-clipart-download-1.jpg",
      "https://vectorified.com/images/official-youtube-icon-3.jpg",
      "https://www.clker.com/cliparts/9/f/d/9/13672177341152140441free-gold-button-youtube-hi.png",
      "https://www.freeiconspng.com/uploads/youtube-icon-21.png",
      "https://images.template.net/wp-content/uploads/2016/04/28063332/Sample-Youtube-Icon-Download.jpg",
      "https://upload.wikimedia.org/wikipedia/commons/8/80/YouTube_Spotlight_logo.png",
      "https://cdn.macrumors.com/article-new/2015/11/youtubemusic-800x707.jpg?retina",
      "https://clipartart.com/images/clipart-youtube-icon-7.jpg",
      "https://cdn.wccftech.com/wp-content/uploads/2015/10/YouTube.png",
      "https://bloximages.chicago2.vip.townnews.com/heraldextra.com/content/tncms/assets/v3/editorial/5/8f/58f38b9c-d7a6-5e17-8a01-d33ff1c4ac6c/5665ff6c7f058.image.jpg?resize=1200%2C1200",
      "https://clipground.com/images/youtube-logo-black-and-white-2.jpg",
      "https://clipground.com/images/youtube-icon-png-free-download-3.png",
      "http://cdn.onlinewebfonts.com/svg/img_45240.png",
      "https://yt3.ggpht.com/a/AATXAJxFxv7GkT4x65uBGNa6Dz9YCdCsTD6L8ppv8Q=s900-c-k-c0xffffffff-no-rj-mo",
      "https://clipground.com/images/youtube-clipart-file-13.jpg"
    ],
    "topImage": "https://www.youtube.com/img/desktop/yt_1200.png"
  }
}

Next.js - Getting Started

Download/Fork project then install packages:

npm install
# or
yarn install

Then run the development server:

npm run dev
# or
yarn dev

Open http://localhost:3000 with your browser to see the landing page.

Link preview route should work on http://localhost:3000/api/link-preview?url=...

Heroku - Deploy to production in 5 minutes

Deploy the Next.js app to production in 5 minutes - this great article gives a very quick way to get this API up and running in production using Heroku. I highly recommend doing this, if you plan on using this in production, since the public routes for the demo shouldn't be relied upon for production!

Using Heroku, requires a few additional steps to make sure Puppeteer is working - see Running Puppeteer on Heroku. In essence you need to ensure puppeteer.launch({ args: ['--no-sandbox'] }); is used and Heroku's Linux box requires additional dependencies to be installed which can be done by the command heroku buildpacks:add jontewks/puppeteer.

Serverless Issues

This API will be difficult to get working with serverless enviroments, especially AWS lambdas - this is primarily due to Puppeteer which is quite a large package (definitly hitting the AWS lambda limit of 50MB). Unfortunatly without Puppeteer the results of the link previews get severely degraded. See Running Puppeteer on AWS Lambda for further info.

Contributing

This API was built for use with the Favorited platform and is actively maintain by the Favorited team. We'd love any help with the project - feel free to open any issues, contribute with PRs, and whatever you'd feel like doing! We're keen on getting the link preview working as close to perfect as can be.

The idea to open source this was inspired after seeing popular social media apps (signal, whatsapp, facebook etc.) having very good link preview services, and in contrary the freely available APIs / link preview systems online being quite lack lustre. The fetching of link previews is hard to perfect since many sites put methods in place to prevent easy data fetching/scraping - see puppeteer-extra to prevent detection. Therefore its hard to guarantee link previews for all the URLs that exist, so if you do find any "problem sites" that don't generate great links - please open an issue, so we can get it working!