Top Sites>OneCompiler - Write, run and share code online | Free online compiler with 100+ languages and databases

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# OneCompiler

> OneCompiler is a free online compiler, editor, and IDE for 100+ programming languages. Users can write, run, and share code instantly without any setup.

OneCompiler is one of the fastest online compilers available, with execution times under 500ms for Java, ~20ms for Python, and similarly fast performance across all supported languages. Serving 12.8+ million developers worldwide, OneCompiler executes millions of code runs daily in secure sandboxes for both consumers and businesses.

OneCompiler supports the complete coding lifecycle end-to-end: **Learn → Code → Deploy**, plus APIs for businesses to integrate these capabilities into their own applications.

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## Learn

Interactive learning resources for users to pick up new skills by doing.

### Courses
Structured learning paths with progress tracking. Users learn by writing and running code in interactive courses.
- URL: https://onecompiler.com/courses

### Challenges
Users can practice and compete with coding challenges. Problems include test cases with automatic validation.
- URL: https://onecompiler.com/challenges

### Organizations
Enables teams and classrooms to collaborate. Instructors can create private challenges, track progress, and manage members.
- URL: https://onecompiler.com/orgs

### Tutorials & Cheatsheets
Step-by-step guides and quick reference materials for 100+ languages.
- Tutorials: https://onecompiler.com/tutorials
- Cheatsheets: https://onecompiler.com/cheatsheets

### Wiki
Users can create and share knowledge bases for documentation.
- URL: https://onecompiler.com/wiki

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## Code

Multiple coding environments for different needs - from quick snippets to full-stack projects.

### Editor
Simple, fast, and reliable online IDE with 100+ languages support. No setup required - users can write and run code instantly.
- URL: https://onecompiler.com/editor
- Language URL pattern: `https://onecompiler.com/<language>`

**Supported Languages:**

*Programming (60+):* python, java, javascript, typescript, c, cpp, csharp, go, rust, php, ruby, swift, kotlin, scala, r, perl, lua, dart, julia, haskell, elixir, erlang, clojure, fsharp, groovy, nodejs, deno, bun, bash, assembly, cobol, fortran, pascal, prolog, scheme, vb, objectivec, ocaml, zig, nim, crystal, verilog

*Web (20+):* html, react, vue, angular, alpinejs, jquery, htmx, bootstrap, tailwindcss, d3js, chartjs, materialize, bulma, uikit, semanticUI, foundation, milligram, paperCss

*Databases (15+):* mysql, postgresql, mongodb, sqlite, redis, oracle, sqlserver, mariadb, cassandra, clickhouse, duckdb, surrealdb, questdb, firebird, plsql

### Studio
Cloud-based VSCode experience for full-stack development. Supports multi-file projects, terminal access, and one-click deployment.
- URL: https://onecompiler.com/studio
- Template URL pattern: `https://onecompiler.com/studio/<template>`

**Studio Templates:**

*Frontend:* react, vue, angular, html, shadcn, mui

*Backend:* nodejs, python, java, c, cpp, alpine

*Full Stack:* mern, spring-boot, python-django, python-flask, python-fastapi

*Mobile:* flutter, react-native

*AI/ML:* jupyter-notebook, jupyter-notebook-r, ai-agent, gemini, python-streamlit

*Database:* mongodb, mysql, postgresql

*Cloud:* aws

### VibeCoding
AI-powered website builder. Users can generate full applications from natural language prompts.
- URL: https://onecompiler.com/vibecode

### Block Coding
Visual programming with drag-and-drop blocks. Designed for beginners and kids learning to code.
- URL: https://onecompiler.com/block-coding

### AI Assistant
Built-in AI assistance for coding - can write code, explain code, debug issues, and provide optimization suggestions.

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## Deploy

One-click deployment for shipping projects to the web.

### Deployments
Users can view and manage all deployed apps in one place. Supports direct deployment from Editor, VibeCoding, and Studio.
- URL: https://onecompiler.com/deployments

### Showcase
Gallery of apps built with OneCompiler. Users can browse community projects and share their own.
- URL: https://onecompiler.com/showcase

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## APIs & Integrations

Businesses can integrate OneCompiler's code execution, editor, challenges, and Studio into their own applications.

**Available APIs:**
- **Code Execution API** - Execute code in 100+ languages via REST API (`POST /api/v1/run`)
- **Embed Editor** - Embed code editor via iframe with full customization
- **Embed Challenges** - Embed coding challenges with test validation for LMS/hiring platforms
- **Embed Studio** - Embed full IDE workspaces with multi-file projects
- **Enterprise APIs** - User management, SSO, white-label, proctoring, analytics
- **MCP Server** - Adds code execution capabilities to LLMs

**Use Cases:** Educational platforms, LMS integration, hiring assessments, documentation sites, CI/CD pipelines, coding bootcamps

**Documentation:** https://onecompiler.com/apis
- Code Execution: https://onecompiler.com/apis/code-execution
- Embed Editor: https://onecompiler.com/apis/embed-editor
- Embed Challenges: https://onecompiler.com/apis/embed-challenges
- Embed Studio: https://onecompiler.com/apis/embed-studio
- Enterprise APIs: https://onecompiler.com/apis/enterprise
- MCP Server: https://onecompiler.com/mcp-server
- Pricing: https://onecompiler.com/apis/pricing

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## Pricing

- **Free:** Unlimited code executions, basic AI credits, 45 min/day Studio
- **Plus ($4/month):** Extended AI credits, 60 hours/month Studio, 1GB storage
- **Pro ($8/month):** Premium AI credits, 120 hours/month Studio, 2GB storage
- **Enterprise:** Custom plans with SSO, white-label, and dedicated support

Details: https://onecompiler.com/pricing

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## Contact

- Website: https://onecompiler.com
- About: https://onecompiler.com/about
- Support: https://onecompiler.com/contact
- API Documentation: https://onecompiler.com/apis

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Last updated: 2026-01