Dart Formatter
Use this free online Dart Formatter to format and indent Dart code. It works instantly in your browser, and your data never leaves your device.
About the Dart Formatter
This dart formatter re-indents Dart code by block structure, cleans up trailing spaces and blank lines and keeps strings and comments untouched. It is ideal for tidying pasted snippets before sharing them.
How to use the Dart Formatter
- Paste your input into the box above, upload a file, or click Sample to try an example.
- Pick any options you need. The Dart Formatter processes your input instantly as you type.
- Click Copy to copy the output or Download to save it as a file.
Features
- Free with no signup and no daily limits
- Private: runs entirely in your browser
- Works on mobile, tablet and desktop
- Upload files and download results
- Live results as you type, with clear error messages
- Clean, fast interface with no popups
Frequently asked questions
Is the Dart Formatter free to use?
Yes. The Dart Formatter is completely free with no signup, no limits on normal use and no watermark.
Is my data safe?
Yes. Everything is processed by JavaScript inside your own browser. Your text is never uploaded to our server or stored anywhere.
Can I choose the indentation?
Yes. Pick 2 spaces, 4 spaces or tabs from the options, and the output updates instantly.
Does it work offline and on mobile?
Once the page has loaded, the tool runs in your browser and works on phones, tablets and desktops.