Which programming languages and databases does OneCompiler support?

OneCompiler supports 110+ languages and databases, so the practical answer is that most common languages and several major databases are covered. The site lists Python, JavaScript, Java, C, C++, PHP, and C# among its popular programming options, plus MySQL, MongoDB, and PostgreSQL among databases. It also names HTML, React, NodeJS, Spring Boot, FastAPI, Lua, PL/SQL, and Pygame as supported options. If your language is not in that visible list, the "110+" figure means it may still be available — check the language selector in the editor.

Programming languages

The homepage groups these under "Popular Programming":

Additional languages and frameworks named on the page:

• HTML
• React
• NodeJS
• Spring Boot
• FastAPI
• Lua
• PL/SQL
• Pygame

Databases

The page lists these under "Web Databases":

• MySQL
• MongoDB
• PostgreSQL

How to confirm your specific language

The homepage only surfaces a subset of the 110+ options. To verify a specific language or database:

1. Open the OneCompiler editor.
2. Look for the language or database selector (the page shows a language list alongside the editor).
3. Search or scan for your target language.
4. If it appears, you can write and run code directly in the browser.

Expected result: your chosen language loads in the editor and the Run control becomes available. If it does not appear in the selector, it is likely not supported despite the 110+ total.

What else runs alongside the languages

The page also describes an in-browser coding agent that reads your workspace, edits files in place, creates new ones, and cleans up after itself. Changes land behind checkpoints you can roll back, and the page states there is nothing to install. This is separate from language support but relevant if you plan to use OneCompiler for multi-file projects rather than single snippets.

Practical selection guidance

• If you need a mainstream language (Python, JavaScript, Java, C, C++, PHP, C#), it is explicitly listed.
• If you need a relational or document database (MySQL, PostgreSQL, MongoDB), those are explicitly listed.
• If you need a web framework (React, NodeJS, Spring Boot, FastAPI), those are named.
• If your language is niche, treat the 110+ claim as a starting point and confirm in the editor before relying on it.

The page does not list every one of the 110+ languages individually, so the visible list is a sample rather than an exhaustive inventory.