TL;DR: Metadata scrubbing is the process of removing the hidden, non-visible data blocks attached to a file before you share it. In an image that means the JPEG APP1 segment holding EXIF, the GPS IFD, the camera make, model and serial in the MakerNote, the embedded thumbnail, plus any IPTC and XMP packets. In video it means the MP4/MOV udta and meta atoms — including the ©xyz GPS atom — and in audio the ID3v2.4 frames or VORBIS_COMMENT tags. A well-built scrubber works by rewriting the file's container without those segments rather than re-encoding it, so the pixels or audio samples stay byte-for-byte identical. Where the scrubbing runs matters: local, in-browser scrubbing never uploads your file, while a server-side tool receives the original first. Scrubbing removes the data record — it cannot remove what the pixels themselves show.
What is metadata scrubbing?
Metadata scrubbing is the bulk removal of the descriptive data a file carries about itself, leaving only the content you actually meant to share. It is worth separating three things people often blur together. Viewing metadata means reading those fields; editing means changing one of them, such as correcting a copyright line; scrubbing means deleting the lot — every block that is not strictly required to display the file. The point is not to fix one field but to make the shared copy carry as little about its origin as possible.
That distinction matters because a single photo can hold half a dozen separate metadata containers, and they do not all live in the same place or follow the same rules. If you have never seen the raw structure, our primer on what EXIF data actually is walks through the fields a camera writes automatically, and the differences between IPTC, EXIF and XMP covers the three standards that coexist inside one image. Scrubbing has to account for all of them at once — which is why "I deleted the location in my photo app" usually leaves several other blocks untouched.
Scrubbing also applies well beyond photos. Video files and audio files carry their own metadata containers, and the same principle holds: a clean copy is one where the descriptive layer has been stripped and the playable content left intact.
What gets removed when you scrub a file?
Start with a JPEG, because it is the most instructive. The file is a sequence of marker segments, and the metadata lives in a handful of them. The APP1 segment that opens with the bytes Exif\0\0 holds the EXIF block: DateTimeOriginal (the moment the shutter fired), the Make, Model and Software tags, and — nested inside — the GPS IFD with latitude and longitude. A second APP1 segment can carry an XMP packet, an XML block that editors like Lightroom use for ratings, edit history and copyright. The APP13 segment holds the Photoshop image resource block, which is where IPTC-IIM captions and keywords are stored. Many cameras also tuck a proprietary MakerNote and a small embedded thumbnail into the EXIF — and that thumbnail is a notorious trap, because it can survive a crop and still show the original frame.
A thorough scrub deletes all of those segments. The IPTC standards body maintains the photo-metadata model that defines many of these fields, which is part of why they are so widely embedded in the first place. Other formats hide the same kind of data in different structures: PNG keeps text in tEXt, iTXt and zTXt chunks; HEIC stores EXIF inside its meta box. The GPS tag in particular is the field most people most want gone — we cover exactly how GPS coordinates get embedded in photos and why a casual edit rarely removes them.
Photo by Kaboompics.com on Pexels.
Video and audio follow the same logic in their own containers. An MP4 or MOV file stores metadata in the udta (user data) and meta atoms, including a creation_time and the ©xyz atom that records GPS coordinates from a phone. Our walkthrough on removing metadata from a video shows what a phone leaves behind in a clip. Audio is similar: MP3 carries ID3v2.4 frames, while FLAC and Ogg use VORBIS_COMMENT blocks, and M4A files use iTunes-style atoms. Scrubbing strips those tag structures while leaving the encoded frames or samples — the actual sound — untouched. One thing worth stating plainly: a separate sidecar file can hold metadata outside the image entirely, and deleting tags inside the photo does nothing to a .xmp file sitting next to it.
How does the scrubbing process actually work?
There are two ways to remove metadata, and the difference between them decides whether your file survives the process intact.
The first and better method is a container rewrite, sometimes called lossless stripping. The scrubber parses the file's structure, copies the actual media payload — the compressed scan data of a JPEG, the encoded frames of a video, the audio samples of an MP3 — into a fresh file, and simply omits the marker segments or atoms that hold metadata. A scrubbed JPEG keeps its start-of-image marker, its quantization and Huffman tables, the start-of-frame and start-of-scan segments, and the entropy-coded scan data, while the APP1, APP13 and any comment segments are dropped. Because the compressed image data is never decoded and re-compressed, the visible pixels come out byte-for-byte identical to the original. This is the approach a privacy-focused tool should always use, and it is how the open-source reference library ExifTool performs its removals.
The second method is re-encoding: decode the file to raw pixels or samples and encode it again from scratch. Metadata vanishes as a side effect because the new encode starts clean — but a lossy format like JPEG or MP4 degrades a little every time it is re-encoded, so this is a blunt fallback rather than a goal. A good scrubber avoids it wherever the format allows a clean rewrite. The practical upshot for you is simple: proper metadata removal should not visibly change your photo or audibly change your track. If a tool noticeably softens an image, it is re-encoding when it did not need to.
Either way, the embedded thumbnail deserves a special mention. Removing the main EXIF block but leaving the thumbnail behind is a classic incomplete scrub — the small preview is its own little image with its own data, and a complete tool deletes it alongside everything else.
Does scrubbing happen on your device or on a server?
This is the question that decides whether scrubbing actually protects your privacy, and it is easy to overlook. Two architectures are common. Server-side tools ask you to upload your file; the stripping happens on their machine and they send back a cleaned copy. Client-side tools do the work locally — in your browser using JavaScript and WebAssembly, or in a desktop app — so the file never leaves your device.
For privacy the distinction is decisive. If your reason for scrubbing is that you do not want your home coordinates or your camera's serial number in the wild, uploading the unscrubbed original to a stranger's server to have it cleaned is self-defeating: the very data you wanted to protect has already left your control. The Electronic Frontier Foundation's work on privacy makes the broader point that the safest data is the data you never transmit in the first place. Metadata Cleaner runs entirely in the browser for exactly this reason — your image, video or audio file is parsed and rewritten locally, and nothing is sent anywhere. When you pick a tool, "where does my file go?" is the first thing worth checking.
Photo by Dan Nelson on Pexels.
How do you scrub metadata from a file?
The process is short enough that the value is in doing it consistently — before sharing, not after. Open Metadata Cleaner in any browser; nothing installs. Drag in the file you want to clean — a JPEG, HEIC, PNG or WebP image, an MP4 or MOV video, or an MP3, WAV or FLAC audio file. Click clean, and the tool rewrites the file without its metadata: the EXIF APP1, the GPS IFD, the IPTC and XMP packets, the MakerNote, the embedded thumbnail, and the video or audio tag atoms all come out. Download the scrubbed copy and share that version, keeping the untouched original somewhere private if you still need the data it holds. Our cross-platform guide on how to strip EXIF data from a photo covers the same steps on Mac, Windows and iPhone if you would rather do it in the operating system.
What metadata scrubbing does not do
Being honest about the limits is what separates a useful explanation from a sales pitch, and there are several.
Scrubbing changes the metadata, never the content. If your face, a street sign, a house number or a reflection in a window is visible in the frame, removing the EXIF does nothing to hide it — visual information lives in the pixels, not the tags. Scrubbing also cannot undo a share you have already made: once you upload an original, any copy a platform or recipient kept still carries its data, and cleaning your local file afterwards does not reach back to claw it in. Clean first, share second.
There are subtler limits too. Audio and video can carry signals embedded in the waveform or the frames themselves — robust watermarks and acoustic fingerprints — that are not metadata at all and survive a tag strip untouched; we draw that line in audio watermarks versus metadata. Some identifiers live entirely outside the file, in a distributor's database rather than the bytes you hold, and no local tool can remove those. And provenance standards such as C2PA Content Credentials are designed to be re-attached: stripping a manifest from an image works, but re-processing that file through certain editors can write a fresh one, as the Content Authenticity Initiative describes. Scrubbing is a precise tool for a specific job — removing the embedded data record — not a universal cloak.
The bottom line
Metadata scrubbing is, at its core, a rewrite: a tool reads the structure of your file, copies the part you care about — the image, the video, the sound — and leaves behind the descriptive blocks that quietly record where, when and with what it was made. Done properly it is lossless and invisible, and done locally it never exposes the very data you are trying to remove. Knowing what it touches, and what it cannot, lets you use it for what it is good at and not rely on it for what it isn't.
Try Metadata Cleaner free — scrub EXIF, GPS, IPTC, XMP and the embedded thumbnail from any image, video or audio file, locally in your browser, before it ever reaches an upload.