Free forever, no signup required →

Free, Online Code Editor

Start coding instantly — no install, no signup. Just use pterocos and build.

Get Started
Runs 
HTML — Markup language
PugMarkdown
CSS — Styling language
SCSSSassLess
JavaScript — Scripting language
TypeScriptJSX (React)CoffeeScriptBabelLiveScript
Python — General purpose
DuckDB — SQL analytics
SQLite — SQL database
PG
PostgreSQL — SQL database (PGlite)
Lua — Scripting language
C# (.NET) — General purpose
Ruby — General purpose
PHP
PHP — Server-side scripting
Rust — Systems language
TypeScript — JS preprocessor
Java — General purpose
Kotlin — General purpose
{}
JSON — Data format
Minecraft Skript — Plugin scripting
✓ Free Forever ⚡ No Install, No Signup ✦ AI Support Open Source View Source

Not just a Code Editor

The most flexible & powerful browser-based development platform available — free, no install required.

Start Coding

Live Preview

See your HTML, CSS & JavaScript render in real-time as you type. No refresh, no delays — instant visual feedback.

Multi-Language Support

Write and run HTML/CSS/JS, SQL (SQLite, PostgreSQL via PGlite), Python, and Lua — all from a single unified browser-based environment.

Zero Friction

No install, no signup, no configuration. Open your browser and start coding instantly. Works on any device.

Secure Share Links

Share your projects instantly with password-protected links. Collaborate or showcase your work with full control.

Monaco Editor Engine

Powered by the same engine as VS Code — syntax highlighting, IntelliSense, multi-cursor editing, and preprocessor support.

Works Everywhere

Runs entirely in your browser — no server needed. Compatible with any modern browser on desktop or mobile.

New Feature

Create Your Developer Portfolio — Right Here on Pterocos

Showcase your best projects, accept donations from supporters, and share your published Pterocos work — all from a single, auto-generated portfolio page. No setup required.

Your Own Public Portfolio Page

Pick a username, write a short bio, and select up to 12 tech-stack skills. Your portfolio goes live at dev.us.kg/portfolio?=username — no account, no login, just a free page that’s yours.

Published Projects, Views & Forks

Every project you share on Pterocos appears automatically on your portfolio as a clickable card — showing its name, description, view count, and fork count. Updates live every 15 seconds.

Donation Link Support

Optionally add a support link to your portfolio — Patreon, Buy Me a Coffee, or PayPal are accepted. Visitors see a clearly labelled button so they can back your work directly.

Languages & Preprocessors

Write and run code in your browser across 13 languages — with full preprocessor support for HTML, CSS & JavaScript.

HTML
Markup
Preprocessors
Pug Markdown
CSS
Styling
Preprocessors
SCSS Sass Less
JavaScript
Scripting
Preprocessors
TypeScript JSX (React) CoffeeScript Babel LiveScript
Python
General Purpose
DUCK
DuckDB
SQL Analytics
LITE
SQLite
SQL Database
PG
PostgreSQL
SQL Database (PGlite)
PG 14 PG 15 PG 16 PG 17
Lua
Scripting
Java
General Purpose
Kotlin
General Purpose
Rust
Systems Language
Ruby
General Purpose
PHP
PHP
Server-side Scripting
{}
JSON
Data Format
Minecraft Skript
Plugin Scripting
Skript 2.9 Skript 2.8
Simple Pricing

Everything is $0.
Free, forever.

No plans. No tiers. No hidden fees. No credit card. Every single feature is free for everyone, always.

The only plan
$0

forever

  • Monaco / VS Code editor engine
  • HTML, CSS & JS — instant live preview
  • SQL (SQLite, PostgreSQL via PGlite), Python & Lua — run button
  • 13 preprocessors (SCSS, TypeScript, Babel…)
  • Unlimited projects & saves
  • Backup & restore
  • Password-protected share links
  • No account required
  • Works on any device, any browser
Start Coding Free →

No credit card. No sign-up required. Just open and build.

No freemium bait
No paywalled features
No credit card ever
Free forever
What people are saying
L
Lachu Man Basnet
Tech entrepreneur

Nice idea, looks like an extremely useful tool

Read more at fazier.com →
I
Ihor
Indie Hacker

this is pretty useful tbh. i've definitely had those moments where i just wanted to test a quick sql query or a tiny python snippet

Read More at IH →
I
Inti David
Reviewer

Pterocos is an excellent online HTML, CSS, and JavaScript editor. The interface is clean and easy to use, the live preview works smoothly

Read More at F6S →
Community

Discord Partners

Communities that partner with Pterocos — sharing resources, tutorials, and support for developers of all levels.

LTC logo

LTC

Partner

A thriving Discord community for developers and learners — join to connect, collaborate, and grow your coding skills together.

Join Server
Coding Central logo

Coding Central

Partner

A welcoming server for coders of all levels — share projects, get help, and connect with a passionate developer community.

Join Server

Get in Touch

Have a question, idea, or partnership proposal? Reach us by email or join our Discord community.

Email us
[email protected]
Join our Discord
discord.gg/7bGKHu3gaz
Select PostgreSQL Version
PostgreSQL 14 PGlite 0.2.17
PostgreSQL 15 PGlite 0.2.17
PostgreSQL 16 PGlite 0.2.17
PostgreSQL 17 PGlite 0.2.17