# How Local File Conversion Works

> Browser-only file conversion. Selected files are processed on this device and are not uploaded to a conversion server.

Source: https://localconverter.tech/how-it-works

Select a source, choose a supported output, run the local conversion and download a separate result. Keep the original until you have checked the output.

## Choose, convert and download

Choose a supported file or paste text, adjust the settings and select Convert. Browser libraries and WebAssembly engines create the output on your device. No Node.js installation or local server is required.

## Save before leaving

Results stay in this browser tab until you remove them or reload/close the page. Download anything you want to keep. Saved downloads are independent of the browser workspace.

## Questions

### Do files leave my computer?

Files, pasted text and generated results are processed in this browser. They are not uploaded to a conversion server. Engine downloads can require internet access; large operations depend on the memory and CPU available on this device.

### Can I convert files without internet access?

The website and required engine assets must load first. Processing runs on this device; a fresh visit or an uncached engine still requires internet access.

### How long can I download completed results?

Results stay in this browser tab until you remove them or reload/close the page. Download anything you want to keep. Saved downloads are independent of the browser workspace.

## Related information

- [All tools and conversion pairs](https://localconverter.tech/tools.md)
- [Supported file formats](https://localconverter.tech/formats.md)
- [File privacy and temporary storage](https://localconverter.tech/privacy.md)
- [Local processing security](https://localconverter.tech/security.md)
- [Terms of use](https://localconverter.tech/terms.md)
- [Conversion help](https://localconverter.tech/help.md)