Dev tools · alternatives · 2026
24 alternatives to Online Java Compiler
Online Java compiler (Editor/Interpreter)
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Online Java Compiler launched in 2024; newer entries below may have overtaken it.
- 1
- 2SJ
With this standalone compiler, you can rely on all Java 11 javac features to be available, even when using newer Java versions. Specifically, this allows you to: - compile code even if your Java environment isn't a full JDK (Java JRE, for example!) - target Java 1.7 for compilation without any warnings or restrictions. - use the Compiler Tree API without resorting to --add-opens trickery that may eventually fail in newer Java releases - build a modified compiler with additional features or custom tweaks I made this after finding that the otherwise superb "jsweet" Java-to-JavaScript…
2023 · github.com · its alternatives →
- 3
- 4
- 5
- 6
Codeer▲7Free online compiler & code editor | programming tools
2025 · codeer.org · its alternatives →
- 7
- 8
Run JavaScript instantly in your browser - no setup needed
Feb 2026 · online-js-compiler.vercel.app · its alternatives →
- 9IS
2022 · github.com · its alternatives →
- 10
- 11JC
2023 · javafiddle.leaningtech.com · its alternatives →
- 12
Free online code playground for 24+ programming languages
Oct 2025 · compilebytes.com · its alternatives →
- 13
- 14JT
I had this crazy idea like some years ago.. I wasn't expecting it be factible, and there's still some semantic problems with this approach Anyways, the whole idea was to take some java source, generate an AST, and output it back as syntactically correct PHP. why? 50% fun + 50% exploration So I have this really basic compiler, which can roughly output its own code; what's still missing? - static vs instance detection (-> vs ::) - class' properties - method visibility - enums - inner types - annonymous classes - dealing with method overriding There's a huge gap in the semantic area (eg:…
2014 · its alternatives →
- 15
- 16AC
2022 · gist.github.com · its alternatives →
- 17JA
I've open sourced a JavaScript to WASM compiler. It's an experimental tool, but given the semantics I already implemented, I'm fairly certain I am able to eventually cover 100% of JavaScript spec. Any ideas, questions or critique welcomed! If you are interested in WASM, especially with new proposals like WASM GC or exception handling, it might be a good source of seeing these features in action - the project has a few thousand lines of hand written WAT so far.
2024 · github.com · its alternatives →
- 18
- 19
- 20IB
2021 · codigo.so · its alternatives →
- 21IW
2025 · github.com · its alternatives →
- 22
- 23
- 24
Also compare
Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →