The Modern.
JSFiddle Alternative.
JSFiddle Alternative.
JSFiddle Alternative.
JSFiddle is a classic for quick snippets — but it hasn't grown with you. NitroIDE keeps the instant-gratification playground and adds the Monaco editor, multi-file workspaces and offline mode.
NitroIDE vs JSFiddle
An honest side-by-side. JSFiddle is a solid tool — here's where the two differ, so you can pick what's right for your project.
| JSFiddle | NitroIDE | |
|---|---|---|
| Sign-up required | Optional (to save fiddles) | Never |
| Editor engine | CodeMirror-based panes | Monaco (VS Code's engine) |
| Live preview | Yes (Result pane) | Yes (live iframe + device modes) |
| Multi-file projects | Single fiddle per snippet | Full virtual file system |
| Works offline | No | Yes |
| Code privacy | Fiddles stored on their servers | Local only, zero tracking |
Bring Your Code With You
Your fiddles don't have to stay fiddles. Paste the code into a fresh workspace, split it into proper files with the Explorer, and suddenly that snippet is a real project.
Import via Gist
Paste any public Gist ID into nitroide.com/tools/codebox.html?gist=YOUR_ID and your code loads straight into the editor. No export dance.
Import via URL
Got a raw file link? Append ?url=YOUR_RAW_URL to the workspace address and NitroIDE fetches it directly into your session.
Start From a Template
Skip the blank page. Ten starter templates open instantly in the editor — portfolios, games, tools and more.
Why Developers Switch
JSFiddle nailed the quick-share playground. NitroIDE takes that same instant loop and gives it a professional editor, real project structure and total privacy.
Private by Architecture
There's no server to leak from. Your code executes in your browser's memory and is stored in your browser's localStorage. Nothing is uploaded, tracked or sold — privacy isn't a plan tier, it's how the app is built.
Works Offline
Install it as a PWA and keep coding on planes, trains and flaky café Wi-Fi. The editor, preview and your files all work without a connection.
Real Monaco Editor
The same editing engine as VS Code — multi-cursor, bracket matching, find/replace and Emmet built in. Your muscle memory transfers instantly.
Free Forever
No credits, no compute limits, no "free tier" that quietly expires. Client-side means no servers to pay for, so the price is $0 — permanently.
Common Questions
Straight answers before you switch.
Is NitroIDE as fast to start as JSFiddle?
Faster, arguably. There's no page of boilerplate — the workspace opens straight into an editable project with live preview already running, and no account wall in front of it.
Can I share my code like a fiddle link?
Yes — use the Share button to generate a link, or export a single portable HTML file. You can also embed a live, read-only playground in any blog post with ?embed=1.
What does NitroIDE do that JSFiddle doesn't?
The big three: a real VS Code-grade editor (Monaco with Emmet), multi-file projects instead of one flat snippet, and full offline support as an installable PWA.
Switch in 30 Seconds
No signup, no install, no credit card. Your next project is one click away.
Community Plan
Everything is unlocked. No credit card required.