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

Vault by HashiCorp
Infisical
Airlock
Doppler
Pipelock
DhiWise
Tragentics
AgentLock is a security gateway for AI agents: agents request, you approve on your phone. Zero-knowledge key vault, full audit trail, free plan available.

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 | agentlock.net |
| Pricing | — | |
| Platforms | — | |
| Company | — | Startup from Switzerland · 1 - 9 employees |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of JSFiddle yet.
AgentLock is a security gateway between AI agents and the services they touch. An agent sends its intended action - an HTTP call, an MCP tool call, a browser session, an SSH command - through AgentLock, where a policy decides whether it runs, is blocked, or needs human approval. Approvals arrive...
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 AgentLock yet.
Walkthroughs and reviews on video.
Dashboard JSFiddle Online JavaScript Editor jQuery, Angular, Backbone, Underscore, Knockout, Y
More videos
No AgentLock videos yet. You could help us improve this page by suggesting one.
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing JSFiddle and AgentLock.
AgentLock's answer:
AgentLock sits between the agent and the outside world instead of trusting the agent to behave. Every HTTP call, MCP tool call, browser action or SSH command becomes a request that a policy decides on, and anything sensitive waits for a human approval that arrives on the phone. Credentials live in the vault and are injected only at execution time, so an agent can use a key without ever seeing it - and if nobody approves in time, the action simply does not happen.
AgentLock's answer:
A secrets manager stores keys, but once an agent holds one, nothing stops it from making the wrong call. AgentLock covers both halves: the encrypted vault plus a gateway with policies, human approval, automatic redaction, a full timeline and undo for supported actions. It is available as an MCP server and an SDK, so an existing agent can be routed through it without a rewrite, and the free plan already covers 100 actions a month with one agent.
AgentLock's answer:
Developers who run autonomous agents against real systems - deployments, payments, mail, customer data - and want an audit trail and a stop button instead of hoping the prompt holds. Small teams also use it to let an agent work with shared credentials without handing the keys to every team member or to the model itself.
AgentLock's answer:
TypeScript across the stack: a React dashboard on Vercel, Supabase with Postgres, Auth and Edge Functions for data, policies and the encrypted vault, a self-hosted runner for actions that need a private network, React Native for the iOS and Android approval app, and Stripe for billing.
Share your experience with using JSFiddle and AgentLock. 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 AgentLock 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 / 3 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 / over 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 AgentLock since Sep 2026.
When comparing JSFiddle and AgentLock, you can also consider the following products.




Infisical is an open source, end-to-end encrypted platform that lets you securely sync secrets and configs across your engineering team and infrastructure
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Code, create, andlearn together. Use our free, collaborative, in-browser IDE to code in 50+ languages — without spending a second on setup.
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