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How it works without a server
The tracer is compiled to WebAssembly, a format browsers run at close to native speed. When you drop an image, your browser decodes it, the tracer turns it into paths in a background thread, and the SVG is created on your device. There is no upload endpoint on the site at all.
How to check it yourself
- Open your browser's developer tools and the Network panel.
- Drop an image and watch: no request carries your file.
- Or turn off your connection after the page has loaded, and trace an image anyway.
Good for confidential work
Unreleased logos, client artwork, signatures and scans of documents never leave your machine, so there is nothing to leak, keep or delete. The only other requests the site makes go to page-view analytics, which you can switch off in the cookie settings.
Questions
Does it work offline?
Yes. After your first visit the page and the tracer are cached, and you can install the site as an app from your browser's menu.
Is anything stored on my device?
Only your cookie choice, your theme and language if you allow them, and two analytics cookies while Analytics is on. Your images and SVGs are kept in memory until you close the tab.
More tracing tips in the complete guide, or go back to the converter.