Your files stay on your device.
Qingtu uses as little data as possible. Image compression runs locally in your browser, and image files are never uploaded to our servers. Here is the full data path from choosing an image to downloading the result.
Four things worth knowing
Images stay local
Original pixels, compressed results, and previews are not sent to Qingtu.
Temporary in memory
Selected files and results exist for the current page and clear on refresh or close.
Exports are your choice
Recipe JSON contains settings only. The batch CSV contains names, dimensions, and byte sizes—not image pixels.
Only UI preferences sync
Language, theme, contrast, favorite IDs, and optional analytics choices sync across subdomains. Images do not.
Image processing
Your browser processes selected images using JavaScript, Canvas, and built-in image decoding. Temporary previews clear when you refresh or close the page. We cannot view, store, or recover your images.
Files you choose to export
When you download an image, your browser saves the locally generated file to a location you choose. Exported recipe JSON records target KB, longest edge, format, rotation, flip, crop ratio, and focus position—never the source image or preview. Batch CSV files record names, output dimensions, before/after byte counts, and savings. Qingtu does not receive these exports.
Essential access data
Our hosting platform may record essential technical information for security, reliability, and traffic measurement, such as access time, device type, and error logs. This information is not used to read image content.
Advertising and cookies
Qingtu uses Google AdSense. Depending on your region and consent choices, Google may use cookies or local storage for ad delivery, frequency controls, and measurement.
Local preferences and favorites
Language, theme, and high-contrast choices are stored in your browser. These display preferences and up to 16 favorite tool IDs also use .miluland.com domain cookies so same-domain pages stay consistent. Favorites never contain inputs, files, or results, can be cleared from the MiluLand tool directory, and are not intentionally uploaded.
Contact
Qingtu is a free MiluLand tool. If you have a question about this notice, use the MiluLand contact page. Please do not attach private source images to your message.
Optional analytics
This site loads Google Analytics only after your explicit permission to measure visits to tool and information pages. File names, file contents, tool inputs, search terms, QR payloads, URL parameters, and results are excluded. Google's enhanced measurement is off.
Your choice is saved in a .miluland.com cookie for 180 days and shared by MiluLand pages with analytics enabled. Use ‘Analytics choices’ at the bottom of the page to decline or withdraw permission; withdrawal disables measurement and clears accessible GA cookies. Browser GPC and Do Not Track keep analytics off. Advertising has separate Google consent settings.
Updated September 12, 2026