Error code 400 is a server side error. I means the server didn't understand your request. If I was to take a guess it would have to do with your input string. It does not appear to be written in the normal way variables are sent in post. That being said, a server can be written to accept the variables any way it wants to. But if it is the reason this is how the string should look.

name=value&name2=value2

You get the idea. Also JDoodle is a pay service. Most pay services will help you, they don't want to lose a client.

Answer from Drivers Sea on Stack Overflow
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JDoodle
jdoodle.com โ€บ online-java-compiler
Online Compiler and Editor/IDE for Java, C, C++, PHP, Python, Ruby, Perl - Code and Run Online
JDoodle is an Online Compiler, Editor, IDE for Java, C, C++, PHP, Perl, Python, Ruby and many more. You can run your programs on the fly online, and you can save and share them with others. Quick and Easy way to compile and run programs online.
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Jdoodle
itext.jdoodle.com โ€บ embed โ€บ itext
JDoodle - free Online Compiler, Editor for Java, C/C++, etc
JDoodle is a free Online Compiler, Editor, IDE for Java, C, C++, PHP, Perl, Python, Ruby and many more. you can run your programs on the fly online and you can save and share them with others. Quick and Easy way to compile and run programs online.
Discussions

Any free, or cheap, online compilers for Python and Java?
Not a compiler but it seems like you are trying to make a version of repl.it More on reddit.com
๐ŸŒ r/Compilers
14
0
October 13, 2023
How to implement jdoodle API to compile and run java programs in Android Studio? - Stack Overflow
I am creating an android app too write and run java code in an android device using Android studio we tried using the jdoodle API to compile and run the java code in the app. But whenever we tried to More on stackoverflow.com
๐ŸŒ stackoverflow.com
guess what guys!!!(jdoodle is a java compiler)
Yes, and not just a Java compiler ;) More on reddit.com
๐ŸŒ r/PhoenixSC
1
5
February 25, 2024
Can I do AP Comp Sci A with JDoodle (Online Java Complier)?
You can run some of it, eg. the ones that are only one file. But some of the projects are larger, and consist of more than one file of java. What are your circumstances that would require you to use only JDoodle? More on reddit.com
๐ŸŒ r/FLVS
5
1
September 14, 2021
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freeCodeCamp
forum.freecodecamp.org โ€บ t โ€บ java-hello-world-via-object-with-jdoodle โ€บ 561331
Java "Hello world" via object with jdoodle - The freeCodeCamp Forum
October 8, 2022 - So Iโ€™m using this online editor to help with learning Java and Iโ€™ve written this. Iโ€™m just trying to print โ€œHello World!โ€ via an object. public class test { public static void function() { System.out.printโ€ฆ
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Nutpan Pty Ltd
jdoodle-ios.soft112.com
JDoodle: Code Compiler 1.5.6 Free Download
FREE JDoodle, the ultimate coding mobile app with AI-powered online compiler and IDE. Write, compile & execute code on the go in 88+ Languages: Java, C++, Python, and more!
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Reddit
reddit.com โ€บ r/compilers โ€บ any free, or cheap, online compilers for python and java?
r/Compilers on Reddit: Any free, or cheap, online compilers for Python and Java?
October 13, 2023 -

I'm trying to make an online editor and compiler for my students to run code on. Yes, there are some out there but they don't fit my needs.

I've been able to use OneCompiler's API through RapidAPI but it costs a bit too much. Is there an open source compiler I can run on a server and connect to? I've tried use Codex-API but can't get the darn thing to work. It needs me to setup a docker container and such but I get errors. Not sure if it's a me thing or not so I'm looking for guidance from y'all with other possible solutions that I might be missing. Thanks.

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JDoodle
jdoodle.com
JDoodle - Online Compiler, Editor for Java, C/C++, etc
JDoodle is an Online Compiler, Editor, IDE for Java, C, C++, PHP, Perl, Python, Ruby and many more. You can run your programs on the fly online, and you can save and share them with others. Quick and Easy way to compile and run programs online.
Find elsewhere
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Slashdot
slashdot.org โ€บ software โ€บ sql editors โ€บ jdoodle vs. java
Compare JDoodle vs. Java in 2025
This blend of mobile accessibility and robust features makes JDoodle a versatile tool for programmers on the go. The Javaโ„ข Programming Language is designed as a versatile, concurrent, and strongly typed object-oriented language that utilizes a class-based structure.
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JDoodle
jdoodle.com โ€บ blog โ€บ top-5-java-ide
Top 5 IDEs for Java students and developers
September 30, 2024 - A Java IDE speeds up coding with ... a basic text editor. ... Yes, JDoodle is a free online Java editor where you can code, compile, and run Java instantly without installing software....
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Google Play
play.google.com โ€บ store โ€บ apps โ€บ details
JDoodle: Code Compiler - Apps on Google Play
Experience the convenience of mobile programming with JDoodle's advanced mobile IDE and Online Compiler, a trusted resource for programmers since 2013. Dive into the future of coding with tools like our Java Compiler, C++ Compiler, Python IDE, and the newly added AI Code Debug & Execute in Interactive Mode features, right at your fingertips.
Rating: 3.9 โ€‹ - โ€‹ 780 votes
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Uptodown
jdoodle.en.uptodown.com โ€บ android โ€บ tools โ€บ general
JDoodle for Android - Download the APK from Uptodown
JDoodle is designed to bring the power of mobile programming to your fingertips through a sophisticated mobile IDE and online compiler. With an array of tools like the Java Compiler, C++ Compiler, and Python IDE, it caters to diverse coding needs.
Published ย  April 15, 2025