Purpose and Positioning
OneCompiler is an online coding platform, officially described as "Code online with One Compiler," and it states that it has helped more than 12.8 million users worldwide write code online. It is aimed at users who need to write code and run code directly in the browser, and also at developers who want to integrate code execution capabilities into their own products.
Main Capabilities
Writing Code Online
The platform provides an online code editor, allowing users to write code in the browser. It also mentions providing Editor and Challenges capabilities.
Embedding and Integration
- iFrame embedding: The official Editor and Challenges can be embedded into your own website as an iFrame, and it states that you can get the code execution capabilities in minutes.
- API calls: Its API can be called from backend applications to run code, read reports, and more, and it states that this can be used to build more complex use cases.
- Custom workflows: It states that if a use case is not covered by the API, you can contact its team to build a custom workflow.
Built-in Coding Agent in the Editor
It describes having "State-of-the-art coding agents" in the browser. The specific behaviors of this agent include:
- Reading the workspace, editing files in place, creating new files, and cleaning up after itself when done, executing step by step with the user able to watch throughout.
- Every change lands after a checkpoint and can be rolled back.
- Nothing to install.
- Example flow: Checking the header markup and the existing styles, reading styles.css, editing index.html, editing styles.css, creating script.js; the result is a new toggle button added to the header, styles.css switching colors under the dark class, and script.js saving the selection to localStorage so it persists after refresh; then you can run and try out the button.
- Changes flow directly into the editor, and every line changed will beMark.
- The agent can read, edit, create, and delete files across the workspace to complete a single instruction.
- Users can Restore, re-apply, or handle file by file with Apply and Reject before continuing.
Context and input methods
The officially listed context includes: your files, input content, the output of the previous run, and the code you have selected. Input methods supported: dictate with a microphone, paste a screenshot, or attach files for a conversation turn.
Model sources
Officially, models from vendors such as OpenAI, Anthropic, Google, DeepSeek, xAI, and others are available, and Free ones included.
How to use (based on official materials)
- Write code online directly in the browser.
- If you want to add code execution capability to your own website, you can embed Editor and Challenges as an iFrame.
- If you want to run code from the backend or read reports, you can call its API; for workflows not covered by the API, you can contact the official team for customization.
- In the editor, use the built-in agent, provide context through text instructions, microphone dictation, screenshots, or attachments, and the agent reads and modifies workspace files, then confirms changes item by item after checkpoints.
Applicable scenarios
- Individual users or teaching scenarios that need to write and run code online.
- Products or platforms that want to embed a code editor and programming challenges in their own website.
- Development scenarios that need to call capabilities such as executing code and reading reports from the backend, or need customized workflows.
- Users who want to use a coding agent in the browser to make file-level changes and need rollback-capable checkpoints.
Limitations and information not provided
The official page does not provide information such as the specific list of supported languages, runtime environment specifications, free quota and pricing, API rate limits, model invocation costs, the agent's specific model versions and limitations, or details of data storage and privacy policies; all of these are not yet provided.
