SingleFile is a web extension that saves a complete web page into a single HTML file. It is compatible with multiple browsers including Chrome, Firefox, Microsoft Edge, Safari, Vivaldi, Brave, Waterfox, Yandex browser, and Opera. Users can save the current tab, selected content, or multiple tabs with a single click. The extension also allows for auto-saving of pages and uploading saved files to Google Drive or GitHub.
SingleFile also provides a command-line interface (CLI) for advanced users to save web pages from the command line. It is licensed under AGPL and has been integrated into various projects such as ArchiveBox and Trilium Notes.