> For the complete documentation index, see [llms.txt](https://docs.qremix.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.qremix.org/solidity-modules/solidity-compiler.md).

# Solidity Compiler

The **Solidity Compiler** lets you compile your smart contracts directly in your browser without installing external tools. It’s a powerful and flexible tool tailored for Ethereum developers who want an integrated, smooth experience for compiling `.sol` files within a smart contract IDE.

###  Features 

* **Smart file detection** – automatically shows all `.sol` files in your workspace
* **Multiple compiler versions** – choose the version that fits your contract requirements
* **Advanced compilation settings** – set optimizer, EVM version, and more
* **Auto-compile** – contracts can compile automatically when edited
* **Artifact generation** – generates and saves ABI and Bytecode for your contracts
* **Warnings and error handling** – shows helpful feedback for fixing your code

### Solidity Compiler Basics

To compile a smart contract, first select a `.sol` file in the **File Explorer**. If you have multiple files open, make sure the one you want to compile is the **active tab** in the Editor.

If no file is currently active or no contract has been compiled yet, the Solidity Compiler panel will appear empty, prompting you to choose or open a contract file.

<div align="center"><figure><img src="/files/KtIy8MYxWcBEQImrPTeM" alt="" width="239"><figcaption></figcaption></figure></div>

#### 1. **Select a File**

Once you open a workspace, all Solidity (`.sol`) files will be listed in the file dropdown. Select the one you want to compile.

<figure><img src="/files/Y14U9ynBYtyQh3bDJZHQ" alt="" width="201"><figcaption></figcaption></figure>

#### 2. **Choose a Compiler Version**

Select the Solidity version your contract requires. The list includes popular stable releases.

<figure><img src="/files/EIA1RGze5SFLrxxm7XlK" alt="" width="371"><figcaption></figcaption></figure>

#### 3. **Set Your Preferences**

You can configure the following:

* **Auto-compile**: Automatically compile the contract when it changes.
* &#x20;**Advanced Settings** (optional):

  * **Language**: Solidity or Yul
  * **EVM Version**: Select the Ethereum Virtual Machine version
  * **Enable Optimizer**: Optimize contract size and gas usage
  * **Optimizer Runs**: Number of optimizer iterations.

  <figure><img src="/files/blGyf2qLucwbUwApdu1X" alt="" width="306"><figcaption></figcaption></figure>

#### 4. **Compile the Contract**

Click the **"Compile"** button to manually compile the contract. If auto-compile is enabled, it may already compile after a change.

#### 5. **Check the Results**

After compiling:

* A **green tick** means compilation was successful.
* If there’s an error, it will be displayed at the bottom.

<figure><img src="/files/O3dm94t6SjHHpASZuy8l" alt="" width="198"><figcaption></figcaption></figure>

<figure><img src="/files/Z7NbixIpDZj7m04jzwHh" alt="" width="194"><figcaption></figcaption></figure>