Engineer at heart, founder and CTO of @leaningtech. I make compilers: Cheerp, CheerpJ and CheerpX. My younger self wrote Lightspark: an open source flash player
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Kudos to @YIozzelli for making Rust on BrowserPod possible in a ludicrously short amount of time.
New blog post: labs.leaningtech.com/blog/br…
In the last month I have been working on Rust support for BrowserPod: you can now run any Rust CLI application in the browser, without changing any code! Here is a clip of OpenAI's Codex running in the browser:
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Today we are releasing BrowserPod 3.0, with full support for Rust! 🦀
Rust supports WebAssembly natively, but with very limited "system level" access. The end result is that it's simply not possible to compile real world Rust applications for the Web platform.
This changes today. On top of the BrowserPod kernel even extremely large Rust applications just work in the browser. To name a few: jj, ripgrep and even Codex!
For details and crazy live demos: labs.leaningtech.com/blog/br…
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BrowserPod is a WebAssembly code sandbox that can run Claude Code in the browser.
How is this possible, you might ask? Well, we just published a deep dive that explains it all.
In short: we wrote a WebAssembly-native kernel that runs in your tab.
labs.leaningtech.com/blog/br…
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Introducing BrowserCode: run Claude Code fully in your browser.
🖋️ FOSS (Apache 2.0)
🔐Local-first execution
💾 Persistent storage
📱Mobile support
⚡️No install required
Built on BrowserPod, our in-browser WebAssembly code sandbox.
Try to break it 👀browsercode.io/
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Super excited about launching this new tool:
🚀 BrowserCode: A FOSS web app to run TUI agents (such as Claude Code, OpenCode, Gemini CLI and the like) fully in the browser. This first release focuses on Gemini CLI and Claude Code will follow soon.
browsercode.io/
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BrowserCode is released under the Apache License, version 2.0 and it's free to use and unlimited. All the data and execution stays completely local to the browser and it's persistent across sessions thanks to a disk backend based on the OPFS API or IndexedDB.
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This is a preview release, so please try and break it! Please report issues on GitHub and⭐️ the repo if you like our work. Your support will help us push this project forward.
github.com/leaningtech/brows…
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Excited to share BrowserPod 2.0 is now live.
labs.leaningtech.com/blog/br…
This release adds bash, git, and core Linux utilities to BrowserPod, which means running real development workflows directly in the browser.
It is a big usability upgrade and a step toward richer browser based dev environments, agent sandboxes, and interactive tools.
And yes, full agents in the browser are coming very, very soon 🙂
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And Node.js in the browser is just the start. Python, Ruby, Go and Rust coming soon.
And by the end of the year our objective is to run arbitrary Linux containers.
BrowserPod for Node.js launches today, the first engine in our plan to build a universal execution layer for browser based compute for the agentic AI era. By the end of this year BrowserPod will run Linux-class workloads client side . Learn more below 👇labs.leaningtech.com/blog/br…
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Alessandro Pignotti retweeted
BrowserPod for Node.js launches today, the first engine in our plan to build a universal execution layer for browser based compute for the agentic AI era. By the end of this year BrowserPod will run Linux-class workloads client side . Learn more below 👇labs.leaningtech.com/blog/br…
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To further celebrate 16k GitHub stars on the WebVM repo we are also launching on Product Hunt today. Better late than never!
And stay tuned, amazing new features including x64 support and out-of-the-box networking are planned for 2026!
producthunt.com/products/web…
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Huge milestone for @leaningtech: WebVM just passed 16,000 GitHub stars!
That puts us in the top 1,600 repos globally, ahead of repos like OpenAI GPT-3, Audacity, and Signal.
WebVM is based on CheerpX: our engine to run x86 binaries fully in the browser sandbox. x64 coming soon
WebVM has surpassed 16,000 stars on GitHub, placing it in the top 1,600 repos globally.
WebVM is a virtual Linux environment running in the browser using CheerpX. It's FOSS, with no log-in needed.
Try WebVM: webvm.io/
See the repo: github.com/leaningtech/webvm
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Beta launched today: BrowserPod, a #WebAssembly coding sandbox for the browser that boots instantly and runs JavaScript at native speed without cloud provisioning.
Beta supports Node 22. Ruby on Rails & Python coming soon. To learn more/try it yourself:
labs.leaningtech.com/blog/br…
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The internship program at @leaningtech has been a great success, and it is now our preferred path to hire new talent
Started years ago with a single student, the program has now grown to 3 students every 6 months
Looking forward to share more of their stories in the future
New Blog Post 🎊!
As our last set of interns were wrapping up their projects, we asked them to write a little bit about what their internships were like and the projects that they worked on. Read more about it at labs.leaningtech.com/blog/in…
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Alessandro Pignotti retweeted
Introducing the CheerpJ: The Hackathon judging panel!
Four amazing experts are backing us as we bring Java to the browser:
Alessandro Pignotti, Elisabeth Panholzer, Ethan Hale, and Jeff Martin.
Register now to be part of the hackathon:
labs.leaningtech.com/cheerpj…
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🚀Announcing BrowserPod: #WebAssembly powered full-stack developer environment in the browser
Run node.js (and soon Python and Rails) environment fully sandboxed in the browser while exposing ports to the wider internet via Portals.
labs.leaningtech.com/blog/br…
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Can anybody put me in touch with somebody in the Hacker News moderation team?
Our content keeps reaching front page and then being killed for unclear reasons notwithstanding genuine community interested.
I won't lie, I am seriously pissed here.
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🚀 CheerpJ 4.1 out NOW! 🚀
SOTA #WebAssembly JVM that runs large scale #Java applications, applets and libraries in the browser.
In this release:
* Java 17 support (preview)
* Improved Java 11 stability
* Improved mobile support
labs.leaningtech.com/blog/ch…
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