
CodePen
CodeSandbox
replit
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JS Bin
VS Code
GitHub
Test your JavaScript, CSS, HTML or CoffeeScript online with JSFiddle code editor.

Hookdeck
Svix
Pipedream
LogSnag
Zapier
PagerDuty
Event tracking and alert routing for SaaS teams. Events from your app, Stripe, GitHub or Vercel land in a searchable feed with analytics, user-timelines and rules that route what matters to Slack, a phone or any webhook.
Which is more popular?
Based on our record, JSFiddle seems to be more popular. It has been mentioned 204 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | jsfiddle.net | eventsend.io |
| Pricing | — | |
| Platforms | — | |
| Company | — | Startup from the United States · 1 - 9 employees · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of JSFiddle yet.
EventSend is event tracking and routing for product teams. Your app sends one HTTP POST, and the event lands in a searchable feed and in the places your team already works: Slack, Discord, Telegram, your own HTTPS webhook, Pushover or browser push. No SDK, no bots to build, no retry logic to...
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
No analysis of EventSend yet.
Walkthroughs and reviews on video.
Dashboard JSFiddle Online JavaScript Editor jQuery, Angular, Backbone, Underscore, Knockout, Y
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing JSFiddle and EventSend.
EventSend's answer:
Two halves, and the pairing is the whole point. EventSend tracks every event your product emits: signups, payments, errors, deploys, etc. in a live feed you can search and filter by name, level, source, customer and date, with operational analytics over it and twelve months of history on every plan. And it routes the ones that matter into the tools your team already has open: Slack, Discord, Telegram, your own webhook, or a push notification on your phone. Most tools in this space do one or the other, an analytics product that never tells anyone, or a notifier that forgets what it sent.
The routing half is treated as something you can verify rather than hope for: retries with backoff, circuit breakers around a failing destination, idempotent ingestion so a retried webhook is not a duplicate message, and a log of every attempt with the response it got. And you can get the first alert without writing any code: paste one URL into Stripe, GitHub or Vercel and their events start arriving formatted and deduplicated, in about two minutes.
EventSend's answer:
The honest answer depends on who you are comparing it with.
Against the real default, a Slack incoming webhook you wired up yourself, EventSend is the parts you would otherwise write and then maintain: retries, fan-out to several destinations at once, rules that decide what goes where, a searchable history, and source connectors you would never get around to building.
Against LogSnag: the same 2,500-event free tier, lower prices at every paid tier, and delivery into Slack, Discord, Telegram, your own webhook or your phone, which LogSnag does not do natively. Both keep every event in a searchable feed with analytics on top. If what you want is product analytics: funnels, user journeys, dashboards you build yourself, LogSnag is the better pick and you should use it.
Against Zapier: flat monthly pricing instead of per-task, so the bill stops tracking your traffic.
Against PagerDuty: priced per event with unlimited seats rather than per user, which matters when the second engineer joins. But if you need on-call rotations, escalation policies, status pages or post-incident reviews, EventSend has none of those and PagerDuty is the right tool.
EventSend's answer:
Solo founders and small to medium software teams, typically one to 30 people, running a product that already has users and, usually, revenue. The sharpest fit charges through Stripe, ships from GitHub, deploys to Vercel, and lives in Slack, Discord or Telegram rather than in a monitoring console.
Also the people running internal tools and side projects who want real alerting, retried, routed, recorded, without standing up alerting infrastructure to get it.
EventSend's answer:
I got tired of finding out about failed payments from angry customers. Stripe knew the moment the card was declined, I found out days later, when someone emailed to ask why their account had stopped working, and the gap between those two moments is the whole reason this exists.
The design bet is that notifications should arrive where people already are. Every small team has a Slack, Discord, Telegram or a phone available all day, and most of them have a hand-rolled incoming webhook somewhere that fires once, fails silently, and keeps no record of what it did. EventSend is that webhook taken seriously: the same one-line send, with retries, routing rules, fan-out and a per-attempt log behind it.
It is built and run by a small team, bootstrapped, with no outside funding.
EventSend's answer:
Elixir and Phoenix, with LiveView for the interface, Oban for the delivery pipeline and PostgreSQL for storage. The reliability features are built on that queue rather than bolted beside it: retries with backoff, per-destination circuit breakers, distributed rate limiting, and idempotent ingestion keyed on the sender's idempotency key. Outbound webhooks are signed with HMAC-SHA256 and the request path is hardened against SSRF.
Share your experience with using JSFiddle and EventSend. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Test your javascript, CSS, HTML or coffeescript online with jsfiddle code editor. Jsfiddle – code playground.
JSFiddle cannot be used to host code on your server. The code has to be on JSFiddle and is public all the time.
What is missing from JSFiddle is live previews. You have to basically refresh the page by clicking on the play button. And compared to other playgrounds, JSFiddle is probably the slowest. Another slightly frustrating...
We have no reviews of EventSend yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


Https://jsfiddle.net/ used to be also very popular, I see that it is still available, but haven't used it in a while. Which other alternatives do people use now days? - Source: Hacker News / about 2 months ago
Coding is like learning a new language—you 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 / over 1 year ago
Tracking EventSend since Sep 2026.
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