Screen Guru is a free, open-source tool for capturing clean screenshots of websites: not a mockup generator itself, but a screenshot-capture utility that often feeds into a separate mockup workflow.
Being free and open-source with one narrow job (clean website screenshots) means no signup friction or watermarks getting in the way of a quick capture.
Useful as a first step before mockup work: grab a clean site screenshot here, then drop it into a device-mockup tool elsewhere.
It's a screenshot tool, not a mockup generator: don't expect device frames or scene styling from Screen Guru itself.
Fully free and open-source with no paid tier: no signup or watermark on any capture.
Take clean, chrome-free screenshots of any website.
