Go to jsfiddle.net
Run and share .NET Visual Basic and C# code. Currently supports console projects.
Go to dotnetfiddle.net
Play around with database, create your schema and test SQL. Supports number of databases,
currently MySQL, Oracle, PostgreSQL, SQLite and MS SQL Server
Go to sqlfiddle.com
Confronted with a problem, you thought "I know, I'll use regular expressions."
Now you have two problems. refiddle to rescue!
Go to refiddle.com
Found: Elastic Search fiddle
A comprehensive tool for playing around with Elasticsearch, a free/open source search server.
Go to www.found.no/play
This one does not follow the official naming convention but compiles and runs code
written in various languages. Checkout the supported languages from the top menu bar.
The list is exhaustive, from Ada to Verilog via Brainf*ck and other more or less
well known languages.
Go to compileonline.com
Interactive GCC compiler
This is not a regular fiddle. Instead of letting you execute c/c++ code the interactive
compiler compiles your code and then show the assembler code. This lets you investigate
what kind of machine code is generated for certain structures with specific compiler flags.
Go to gcc.gobolt.org
Clojure JS Fiddle
Clojure is a functional language that runs in JVM. Clojure JS takes Clojure code and
and separate stylesheet and then see how they work together.
Go to cljsfiddle.net
Logo Interepreter by Joshua Bell runs logo programs directly in your browser. To get started,
paste some example code from the right side to the field next to "Run" button and hit run.
Go to Logo Interpreter
Getting your next big thing out with Brainfuck can sometimes be a bit overwhelming. But no worries,
the Brainfuck visualizer allows you to step through your application.
Create your own web salad by mixing your choice of markup, style and programming logic. FiddleSalad supports
various languages for each part.
Go to FiddleSalad
Online tool for building and testing regular expression. Syntax higlighting, highlightin of results,
shows matching groups.
Go to refiddle.com
Environment for writing and executing Rust programs.
Go to Rust Play
Play around with ZK Java framework for building web applications. Create UI, write Java code. Run and Test.
Go to ZK Fiddle
Nice an clean environment for trying out Go, the statically typed language developed originally at Google.
Go to Go Fiddle
IBM Swift sandbox
Apple recently open sourced Swift and now you can play around with it in the IBM Swift sandbox.
The system runs on top of Linux, in Docker containers.
Jump to sandbox
oK is a learning environment for the K programming language
In case your K-skills are a bit rusty, check out the oK documentation
The thing is open source, so you can also run it on your own machine.
Code goes left, results come right. Easy as that to test your PHP code. PHP Tester supports multiple versions
from age old 5.x to (almost) latest and the greatest.
Run PHP Tester
One fiddle to rule them all! Those who feel that everything else here is just unnecessary
syntactic sugar might enjoy modeling their next killer app using the Turing Machine designer and
Go to TMFiddle
Practise your Scala skills in the interactive playground. Source code is available on
This way to Scala
Quite comprehensive looking PHP playground with different frameworks and even debugger.
Fiddle with PHP
This aint your grandmothers Fiddle. This is more like a full blown development environment
where you can have your code and date. Don't let the login prompt fool you, scroll down
and choose a language or library to get right to the coding part.
Go to Code
First dedicated C++ Fiddle in this list. This service is backed by JYT just-in-time c++ compiler.
Fiddle with C++