How to Edit Code Online - Free, In Your Browser
Edit code in your browser in a free, full editor - the engine behind VS Code. Pick from 18 languages, switch the theme, open a file to edit it, then save your work to a file or download it. Everything runs on your device; nothing is uploaded and there is nothing to install.
Last reviewed: 2026-06-16
| Property | Value |
|---|---|
| Format | Online, no install, no sign-up |
| Cost | Free |
| Implementing tool | https://freetoolonline.com/developer-tools/code-editor.html |
Steps
- Open the tool and click Launch editor; the editor loads in your browser the first time.
- Pick a language from the dropdown so you get syntax highlighting that matches your code.
- Choose a light, dark, or high-contrast theme to suit your screen.
- Type or paste your code, or click Open a file to load an existing file from your device.
- Click Save / Download to write your work to a file (or download it).
- Optionally, name the buffer and click Save snippet to keep it in this browser for later.
Languages and file types
The editor highlights 18 languages and picks a sensible file extension when you save. A few common ones:
| Language | Saved file extension |
|---|---|
| JavaScript | .js |
| TypeScript | .ts |
| Python | .py |
| HTML | .html |
| CSS | .css |
| JSON | .json |
Saving and snippets
On Chromium-based browsers the Save button writes straight to a file you choose; on Firefox and Safari it downloads the file instead. Named snippets are kept in this browser's local storage, so they are still there when you come back on the same device and browser - they do not sync across devices, and clearing this site's browser data removes them.
What this tool does not do
It is an editor, not a runner. It writes, highlights, and saves code, but it does not run or execute your code - run that in your own environment. Nothing you type is uploaded; the editor works entirely on your device.