JSFiddle
CodePen
CodeSandbox
Pastebin.com
replit
JS Bin
VS Code
GitHub
Conversion Probe
Hotjar
Google Lighthouse
Nibbler
Audit Landin Page
CRO Checker
Cro Software Solutions
Crazy Egg
JSFiddle Conversion ProbeConversion Probe's answer:
Most landing page tools measure performance (speed, SEO, accessibility). ConversionProbe measures persuasion. It runs your page through 7 behavioral psychology frameworks namely Cialdini, Kahneman, Fogg, and more and tells you exactly why visitors leave without converting. You get a scored report with specific fixes. No signup required. The free audit alone gives you a conversion score, blind spots, quick wins, and a first-person visitor perception narrative.
Conversion Probe's answer:
A CRO consultant charges $600-$2,400 and takes weeks. Tools like Hotjar show you what users do but not why they leave. Google Lighthouse scores performance, not persuasion.
ConversionProbe bridges that gap, it gives you the psychology-backed conversion analysis a consultant would deliver, for $29 one-time (or free for the core audit). No subscription, no booking calls, no waiting. Paste a URL, get actionable fixes in 60 seconds.
Conversion Probe's answer:
Founders and marketing teams at early to mid stage companies who know their landing page should convert better but can't justify hiring a CRO consultant. They're data-literate and time-strapped, they've tweaked headlines and button colors based on gut feel and want framework-backed analysis instead.
Conversion Probe's answer:
I've launched products before and watched landing pages underperform without understanding why. Hiring a CRO consultant was too expensive for an early-stage budget, and tools like Lighthouse told me my page was fast but said nothing about whether the copy was persuasive or the trust signals were missing. I built ConversionProbe to give founders the same psychology-driven audit a consultant would run instantly and affordably.
Conversion Probe's answer:
React, TypeScript, Node.js/Express, PostgreSQL, Puppeteer for page scraping, and OpenAI for AI-powered analysis.
Based on our record, JSFiddle seems to be a lot more popular than Conversion Probe. While we know about 203 links to JSFiddle, we've tracked only 1 mention of Conversion Probe. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Coding is like learning a new languageโyou must practice by writing code, not just reading about it. Use free online editors like CodePen, JSFiddle, or Replit to experiment. - Source: dev.to / about 1 year ago
As you embark on these projects, take your time to familiarize yourself with HTML tags and CSS properties. Use online tools like CodePen or JSFiddle to experiment with your code and visualize your results. - Source: dev.to / about 1 year ago
> This specific example, https://jsfiddle.net, is not a monopoly and has many suitable replacements (e.g. https://livecodes.io/, https://liveweave.com). The other two don't even have sidebars... They are suitable replacements in the same way that crickets are a suitable replacement for beef โ It'll get the job done. But often the customer wants more, like the whole experience, and jsfiddle does have a... - Source: Hacker News / over 1 year ago
Open a code editor (or an online editor like CodePen or JSFiddle) and try this:. - Source: dev.to / over 1 year ago
Save your work to get a unique URL like https://jsfiddle.net/yourusername/yourfiddleID/. - Source: dev.to / over 1 year ago
If you want to check this without doing it manually, Conversion Probe scores your page on these principles and shows you where the gaps are. Paste your URL, get a report in about a minute. Free, no signup. - Source: dev.to / 3 months ago
CodePen - A front end web development playground.
Hotjar - The #1 Leader in Heatmaps, Recordings, Surveys & More. Sign up for a 15-day free trial and start learning from real user behavior today!
CodeSandbox - Online playground for React
Google Lighthouse - Lighthouse is an open-source, automated tool for improving the quality of web pages.
Pastebin.com - Pastebin.com is a website where you can store text for a certain period of time.
Nibbler - Free tool for testing how good your website is, and what you can do to improve it. Check accessibility, SEO, social media, compliance and more.
