nowfound

Life & fun · January 4, 2019

An experimental data-flow analysis tool for JavaScript

Find the origin of any character in the DOM

An experimental data-flow analysis tool for JavaScript launched on January 4, 2019 with 95 votes, #365 of 2,587 launches that month and more than 90% of that year's launches. The site was still online in September 2026, 7 years on.

Visit fromjs.com ↗Alternativestop 14% of January 2019

In plain words

An experimental data-flow analysis tool for JavaScript that tracks how data moves through code. It helps developers understand the flow of information in their JavaScript applications by visualizing where values come from and how they propagate. The tool is designed for developers who want to debug complex data transformations or better understand program behavior. Its distinctive feature is the ability to trace data dependencies across code execution.

written from the facts on this page · September 2026

From the sources

For example, some data might have been loaded using fetch, some might have been stored in localStorage, and some might have been hard-coded in the JavaScript code. Then run fromjs from the command line. This will open a new Chrome window. Loading pages will be very slow and some sites will befrom fromjs.com

Does a similar job

all alternatives →
  • Context.devJul 2026 · context.dev · ▲814

    Hello, My name is Yahia, I've been working on scraping products for a long time and maintain a couple of free sites in my spare time (E.g. knifegeek.io) What prompted this is i've rebuilt scraping infra at every company I've started and finally just made it a product. Pass a URL, get clean markdown, html, images, sitemap or pass a domain, get logos, colors, socials, industry data. Goal is to offer a better service than VC funded competitors at a fraction of the cost. Stealth is included and automatic at no additional cost (normally an upcharge by alternatives). Would love your honest thoughts.

  • FromJS2019 · fromjs.com · ▲4

    An experimental data-flow analysis tool for JavaScript

  • How to ensure JavaScript code quality2017 · deepscan.io · ▲83

    DeepScan is a cutting-edge static analysis tool for JavaScript. You can inspect all of your JavaScript code comprehensively.

  • SCRAPRMar 2026 · scraprbeta.vercel.app · ▲260

    The data layer for the agentic web

  • NotebookJS2016 · datazar.com · ▲109

    Scientific computation for JavaScript

  • Compare Analysis Tools For Python, Ruby, C, PHP, Go2020 · analysis-tools.dev · ▲175

    Find static code analysis tools and linters for Java, JavaScript, PHP, Python, Ruby, C/C++, C#, Go, Swift, and more. All tools and linters are peer-reviewed by fellow developers to select the best tools available. Avoid bugs in production, outages on weekends, and angry customers.

More life & fun this month

the category →

Source: Show HN post ↗

Launched alongside, January 2019

the whole month →