Guide

What EXIF and GPS data reveal in photos

A photo is more than pixels. Most cameras write a sidecar of technical notes into the file. Those notes help photo apps sort a library. They can also tell a stranger where you were standing and what device you used.

What EXIF usually includes

EXIF is a common metadata format inside JPEG and many RAW-derived files. Typical fields are capture time, orientation, aperture, shutter speed, ISO, and camera or phone model. Related chunks (XMP, IPTC, PNG text) can add captions, copyright, and software names.

GPS is the sensitive part

If location services were on, a phone can store latitude, longitude, and sometimes altitude. That is useful for a personal map of a trip. It is a problem when the original file is emailed, uploaded to a forum, or sent to a marketplace listing. Social networks often strip GPS on upload, but many websites and chat apps do not.

iOS HEIC and newer formats

iPhone Photos defaults to HEIC, the iOS High Efficiency Image Container format. The metadata is stored in ISO BMFF boxes rather than classic JPEG APP segments. A tool has to read those boxes. Browsers also may not preview HEIC until the file is decoded. ExifGuard handles inspection, stripping, and a local preview of iOS HEIC in the studio.

AI generation tags

Some generators write the prompt, negative prompt, model name, or workflow JSON into the file. If you publish the image, those strings can travel with it. Treat them like any other hidden text: inspect first, then remove if you do not want them public.

A practical checklist

1. Open the original file, not a screenshot of the photo.
2. Look for GPS, camera serial-style fields, and timestamps you do not need.
3. Strip only what you intend to share, or remove all metadata.
4. Download the cleaned copy and inspect it once more before posting.

You can do those steps in the ExifGuard studio. Processing stays in your browser.