SingleFileZ’s self-extracting webpage format is now part of SingleFile: the official SingleFileZ repository says the project was “completely merged into SingleFile.” To save a page in that format, use SingleFile and choose the self-extracting option in the extension’s options page under File format. The exact controls may vary; the repository does not provide a current click-by-click walkthrough.
Save a webpage as a self-extracting HTML file
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Install or open the SingleFile browser extension.
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Open the extension’s options page and find the File format section.
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Choose the self-extracting format, then save the settings.
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Open the webpage you want to keep and use SingleFile to save it. The resulting file is a self-extracting webpage; the archived SingleFileZ project points users to SingleFile’s File format options for this choice. See the official SingleFileZ repository.
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The repository does not document the current option labels or exact save controls, so use the extension’s own options page rather than relying on a fixed sequence of menu names.
What to expect when opening the saved file
The SingleFileZ FAQ says JavaScript must be enabled to open pages saved in the self-extracting format. It also documents local-file restrictions that depend on the browser:
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Chrome: Opening the file from your filesystem requires a command-line switch or the extension. The FAQ says these restrictions do not apply if the saved page is hosted on a server.
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Firefox and Safari: The FAQ also describes local-file conditions for these browsers; check its browser-specific guidance if the file does not open as expected.
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These are conditions of opening the self-extracting file, not evidence that the page was saved incorrectly. Consult the SingleFileZ FAQ for its browser-specific details.
Completeness, speed, and privacy considerations
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Dynamic content is not guaranteed: the reviewed project pages do not promise that every dynamic page, login-protected site, or embedded media item will be captured completely.
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Saving and opening can take longer: the FAQ says the self-extracting format can take longer to save and open. It also notes that the default configuration favors smaller output. Options such as removing hidden elements and unused styles can add processing time and CPU use; disabling those optimizations may reduce that work.
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Some settings can omit resources: the FAQ warns that disabling frame removal or deferred-image saving can leave resources missing. Changing these settings involves a completeness-versus-processing trade-off.
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Additional resource retrieval: according to the FAQ, the extension may retrieve resources present on the page even when they are not displayed or cached. The FAQ says saved data is not uploaded to third-party servers; this is the project’s statement, not an independent security audit or a guarantee about requests made by the original webpage.
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Troubleshooting
SingleFile cannot save the current page
Some domains are blocked by browser security policy, according to the FAQ. That restriction does not by itself mean the self-extracting format is broken. Try another page to distinguish a domain restriction from a broader extension problem.
Saving is slow or uses substantial CPU
The FAQ says options that remove hidden elements or unused styles can increase processing time and CPU use. If the wait is a problem, review those optimization options in SingleFile and consider disabling them, understanding that the output may be larger.
Images, frames, or other resources are missing
Check whether options related to frame removal or deferred-image saving have been disabled; the FAQ warns that doing so can leave resources missing. The project does not guarantee complete capture of every site or type of content.
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Chrome will not open the file from disk
The FAQ says Chrome needs a command-line switch or the extension to open these saved files from the filesystem. It also says the restriction does not apply when the saved page is hosted on a server. JavaScript must be enabled for the self-extracting page to open.
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Frequently Asked Questions
Is SingleFileZ still a separate extension?
The official SingleFileZ repository says it has been completely merged into SingleFile; the self-extracting format is available in SingleFile’s File format options.
Can I open a self-extracting file with JavaScript disabled?
No. The SingleFileZ FAQ says JavaScript must be enabled to open pages saved in this format.
Quick Recap
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