UnuploadedGuide · Photo privacy
What Your Photos Reveal: EXIF and GPS
A photo file can hold location, capture-time and camera details alongside the pixels, and that metadata can travel with the file when you share it. This guide shows what to look for, how different ways of sharing affect it, and what else a shared photo can reveal.
The canvas image converters here process the photo in your browser, without uploading it, and do not copy its original EXIF block. JPG to PDF works differently: when it can, it copies the photo’s compressed image data into the PDF unchanged, removes the EXIF, XMP, IPTC and comment blocks from the file’s header, and keeps any embedded ICC colour profile. Other header blocks, and any data stored after the image, go into the PDF with it. Check the downloaded file before sharing.
What EXIF can contain
EXIF (Exchangeable Image File Format) stores tagged information inside an image file. Cameras and phones use it for capture settings and other details. The fields are hidden when you view the picture, and software that reads the metadata can display them.
Location tags can include latitude, longitude, altitude and the direction the camera was pointing. A camera may record them when it has location permission. Coordinates can be precise enough to identify a building, but accuracy varies, altitude can be less reliable, and location tags can also be edited. Check what the file contains: a location can be present when you did not expect one, and it can be wrong.
Other fields can record the capture timestamp, sometimes with a time-zone offset; camera and lens models; shutter speed, aperture and ISO; orientation; and editing software and version. Some cameras also write body or lens serial numbers and an owner name. A serial number can link images from the same camera even when no location is recorded.
These tags help with photo-library searches, maps and reviewing exposure settings. Before you share a photo, decide which of those details the recipient should get.
How metadata reaches a recipient
An unchanged original includes its metadata. Email attachments, original-quality messaging, AirDrop, cloud links, USB copies and support-ticket attachments can transfer original files. Some sharing paths instead resize or re-encode them, or offer a location-removal option. If the original bytes are sent unchanged, their metadata goes with them and can be forwarded again.
Check sites that host the uploaded file as-is. A listing, forum, wiki, blog or gallery may make the original available to visitors. If that image contains location tags, a photo of something for sale can also disclose where it was photographed.
Check the copy other people receive. A platform may re-encode an upload and strip EXIF from its public copy. That depends on the platform and upload route and can change. A public copy with no metadata does not tell you whether the service received or kept the metadata from your original.
Remove metadata you do not want to share before you send the file, and treat any platform’s cleanup as a second layer.
How to check what a photo carries
On Windows, right-click a supported image file, choose Properties, and open Details. Available location and camera fields appear there. The Remove Properties and Personal Information link can create a cleaned copy. Check that copy afterward, because in some image formats the dialog does not list or remove every metadata field.
On macOS, open the image in Preview and choose Tools, then Show Inspector. Available EXIF and GPS information appears in the inspector. Photos also has an Info view. Both show the common fields; neither lists every metadata block a format can hold.
On iPhone or iPad, Photos can show a location in the photo’s information view. To remove it, open the photo’s menu, choose Adjust Location, then No Location. Google Photos on Android has a details panel for available location and camera information. Recheck the exported file after changing a photo-library setting.
Then compare the information view with the file you plan to share. A missing map does not mean the file has no other metadata, and an export or sharing option can produce a copy that differs from the original.
When conversion removes EXIF
In a canvas-based conversion, the decoder produces a grid of pixel values and the encoder writes a new image from that grid. The original EXIF block is not part of those pixels, so these tools do not copy it, though the encoder can still write its own format metadata. Other conversion methods can keep image streams or metadata, so a new file format alone does not show that the tags are gone.
When the decoder applies an orientation tag, the rotation becomes part of the output pixels and that tag is no longer needed, so check that the output is the right way up. The canvas-based routes do not copy the original coordinates, capture timestamp, camera or lens fields, serial numbers or editing-history tags.
The HEIC to JPG converter uses this pixel-decoding and re-encoding path, so the JPG it makes for an upload form or a recipient also leaves out the original EXIF block.
Removing EXIF also removes useful information, including the capture date. Keep the original in your archive, or note the date before converting if you need it later.
What a metadata scrub does not do
The picture itself can reveal identifying details. Street signs, house numbers, skylines, reflections and balcony views can locate a scene. Screens, name badges, license plates and tattoos can identify people or disclose other information. Removing metadata leaves those pixels untouched, so look at the image as well as its tags.
Metadata removal is not anonymity. The photo still reaches the recipient through your account, email address or message thread, and a service you upload to still sees your connection. Removing metadata reduces what the file itself carries.
It does not retract an original already shared. Cleaning a new copy does not change one that is already in someone else’s inbox or storage.
Check filenames and file dates separately. Filenames and file-system dates sit outside the EXIF block, so removing EXIF does not clean them. The output’s name and dates depend on the converter and how you save it. Rename the file before sending if its name reveals something you want to keep private.