ide.zerethon.com
Zerethon IDE
Write and run code in the browser, and learn how software gets shipped.
- Run code in 14 languages
- Projects and share links
- Algorithm samples
Zerethon
Useful software for developers, schools and everyday work
Six live products on one account: Flow shows where your Laravel app spends its time, Tools gives you 180 free browser utilities, IDE writes and runs code in the browser, Smart Edu runs lessons and online exams for schools, Games offers 27 free browser games, and Social is a calmer place to keep in touch.
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Live today
What you can use on Zerethon
Each product is a separate site and works on its own. All are free; each overview lists what it does today and what it can't do yet.
flow.zerethon.com
Flow
See what your application actually does at runtime.
- Runtime request traces
- Deterministic bottleneck detection
- Offline and Connected modes
tools.zerethon.com
Zerethon Tools
180 free utilities for developers, creators and learners.
- Developer utilities (73)
- Security and hashing
- Algorithm visualisers (31)
edu.zerethon.com
Smart Edu
Lessons, question banks and online exams for schools, teachers and students.
- Organisations and roles
- Question bank with imports
- Lessons
game.zerethon.com
Zerethon Games
27 free browser games — puzzles, arcade and learning games.
- Puzzle games
- Learning games
- Real-time two-player
social.zerethon.com
Zerethon Social
A calmer social space built around people you actually know.
- Feed and profiles
- Friends, groups and pages
- Real-time chat and notifications
Knowledge
What we've learned building these
Practical articles on engineering, web development, security, privacy and education technology — written from the work behind the products.
How we build
What you can expect from every product
Useful first
Every feature has to solve a real task — no sign-up walls in front of ten-second jobs, no feeds built to keep you scrolling.
Private by default
Where a task can run in your browser, it does. Products share your account, never your data.
Honest about limits
We describe what exists today. Every product page lists what it can't do yet.
FAQ
Common questions
What is Zerethon?
Zerethon is a small team that builds six web products: Flow (runtime traces and website scans for developers), Zerethon Tools (180 free browser utilities), Zerethon IDE (an online code editor that runs 14 languages), Smart Edu (lessons, question banks and online exams for schools), Zerethon Games (27 free browser games) and Zerethon Social (a social network built around people you know). They share one account system.
Is it free?
Yes. All six products are free to use.
Do I need an account?
Not for Zerethon Tools or single-player games. Flow's dashboard, running code in Zerethon IDE, Smart Edu and Social need a Zerethon account, and one account works for all of them — you sign in once at auth.zerethon.com.
Do the products share my data?
Only your identity (the account you sign in with). Each product keeps its own data in its own database, so your Smart Edu classes are not visible in Social and your Flow projects are not visible anywhere else.
Does Zerethon Tools send what I paste to a server?
Tools that only transform text — formatting, encoding, hashing, generating UUIDs, AES encryption — run entirely in your browser, so the input is not sent to Zerethon. A few tools, such as an Open Graph preview that must fetch a remote URL, need a server by nature.
Zerethon is not a financial, investment or trading platform. Achievements, points and badges in our products have no monetary value. How we handle your data is described in the privacy policy.