Does removing photo metadata change the picture?

By Check Before Send · Updated 13 October 2026

Not in our tests. We removed metadata from fourteen JPEG test photos and compared the decoded pixels of each original and its copy: no value differed. Metadata sits in separate segments of the file, so taking it out does not have to touch the picture data. That depends on how a tool removes it.

This guide explains why that is possible, what we measured, and what a tool keeps on purpose.

Why the picture can stay as it is

The JPEG standard sets aside application data segments, and a comment segment, as places for programs to store information. It says application segments are reserved for application use and, because they may be defined differently by different applications, should be removed when data are exchanged between application environments. The picture itself is stored in other segments.

A tool can therefore remove the information segments and copy the rest as it is, without decoding and re-saving the picture.

What we measured

We ran Check Before Send on fourteen small JPEG test photos with invented metadata: GPS, capture time, camera, editing software, XMP, extended XMP, IPTC, a comment, an orientation setting, a colour profile, an unrecognised segment and a photo with none. For each we let it make a copy, then decoded the original and the copy and compared every colour value.

Result	Photos
Decoded pixels identical in the copy	14 of 14
Same width and height	14 of 14
Nothing left after a second scan, apart from kept technical values	13 of 14

The other photo held a segment the tool does not recognise. It was reported as unrecognised and the result was marked as not fully checked. Its pixels were identical too.

What stays on purpose

Two kinds of value are kept, because removing them would change how the picture looks:

Orientation. The EXIF orientation tag says whether a photo should be shown rotated or mirrored. The ExifTool documentation lists its values, such as horizontal, mirror horizontal and rotated. Our tool left the setting in a rotated test photo; removing it would show the photo sideways.
Colour profile. A profile tells programs how to read the colours. It was kept too.

The tool lists them as technical information that is kept, so they do not look like hidden data left behind by mistake.

Limits

These are 64 by 48 pixel test photos, not photos from a phone, and not other formats such as HEIC or PNG. A tool that decodes and re-saves the picture can change it; we did not test other tools.

What to do

Compare the picture before and after if quality matters to you.
Expect a rotated photo to keep its rotation setting.
Prefer a tool that leaves the picture data alone. In our tests the decoded values were identical, which is what you would expect if the picture was not re-saved.

Clean a photo and check the copy

Drop the photo into Check Before Send. It lists what it found, you choose what to remove, and it writes a new copy and runs a second scan on that copy. "Verified not found" means that second scan found nothing, not that the file is guaranteed clean.

The photo is read inside your browser and is not uploaded; the Trust Center explains how to confirm that. For what a photo can carry, read what EXIF data is, or browse the other guides.

Sources

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