Photos are personal in a way screen recordings aren't
Most privacy pitches around video conversion talk about screen recordings and bug reports, professionally sensitive footage that could embarrass a company. Photo slideshows carry a different, more personal stake: family photos with faces in them, a whiteboard from a planning session, a scanned lease or medical form, screenshots of a private conversation. None of that is corporate secret-grade, and all of it is the kind of thing you'd rather not hand to a stranger's server on the promise that they'll delete it eventually.
This page turns any mix of JPG, PNG, WebP, or AVIF images into a looping slideshow entirely inside the browser tab. The photos are read off your disk, decoded, sequenced, and encoded on your own machine, none of it requiring a network connection once the page has loaded.
What an upload-based photo tool actually does with the file
It's worth being specific about the alternative, since "upload" undersells what happens. Your photos travel to a server, sit in a queue with other people's files, get converted by a script on hardware you'll never see, and land under a retention policy that's usually vague about how long "temporary" storage lasts. Some sites are careful about this. Plenty aren't, and you generally can't tell which from the landing page alone.
Running the pipeline locally sidesteps the question rather than answering it. There's no queue because there's no server, no retention policy because nothing is retained anywhere but your own downloads folder.
Screenshots count too, and they're often the leakiest kind
A pasted screenshot doesn't feel like a file the way a photo does, which is exactly why it slips through privacy thinking that photos don't. Press Ctrl+V (Cmd+V on a Mac) and whatever's on your clipboard drops straight in, no save-and-reupload step in between. That convenience cuts both ways: a screenshot of a private message thread or a bank statement is just as easy to paste into an upload site as it is here, and just as easy to forget it happened. Doing it locally means the convenience doesn't cost you anything.
What 'never uploaded' does and doesn't promise
This is worth being precise about. The guarantee covers the process: nothing you drop into the tool is transmitted anywhere while it's being turned into a GIF. It says nothing about what you do with the finished file afterward. If you export a slideshow of screenshots and post it somewhere public, that's a choice you made after the fact, not something the tool did to you. The privacy here protects your working files, not your judgment about the output.
One format caveat: HEIC photos, which iPhones sometimes store internally, only decode natively in Safari. A photo picked from an iPhone's library normally arrives as a JPEG regardless, so this rarely bites in practice, but a raw .heic file dragged in from elsewhere needs Safari or a quick JPEG export first. For per-slide timing, mixing photos with video, and captioning individual slides, the images to GIF page covers the full feature set.