Test file
ChatGPT / GPT-4o · PNG
PNG export from ChatGPT / GPT-4o; exact upstream build not supplied.
- Version
- Not provided by upstream
- SHA-256
7cd57b4a33f0…
JPG / PNG / lossless container cleanup
Remove AI metadata from JPG and PNG
Inspect C2PA, EXIF, XMP, IPTC and prompt-bearing text first. Then create a clean copy by removing selected container sections without decoding or recompressing the image.
CONTEXT / EVIDENCE
JPG segments and PNG chunks are separate from pixels
A JPEG container can carry EXIF and XMP in application segments, IPTC data, comments and a C2PA manifest in APP11. PNG uses named chunks such as eXIf, tEXt, zTXt, iTXt and the C2PA caBX chunk. These layers can be copied or omitted independently from the encoded image data.
ClearTags parses the container in your browser and writes a new file without the supported sections you select. It does not draw the image to a canvas, so this JPG/PNG path avoids an additional lossy encode and preserves the existing encoded pixel payload.
FORMAT / CLEANUP RESULT
What can be inside each file type?
ClearTags reads the exact publishing file first. The result depends on the container and the sections actually present—not only on the filename extension.
| File type | Readable or removable fields | Clean-copy result |
|---|---|---|
JPEG / JPG |
| Selected application segments are omitted while the encoded JPEG scan data stays unchanged. |
PNG |
| Selected metadata chunks are omitted while the encoded IDAT image data stays unchanged. |
MP4 / MOV |
| Supported media streams are remuxed locally without intentional metadata carryover; codec compatibility is required. |
The table describes supported container cleanup, not every proprietary field or a guarantee about a platform decision. Reinspect the clean copy before publishing.
REAL FILES / JPEG + PNG
Container cleanup tested on licensed exports
The Lab currently covers one ChatGPT PNG plus Adobe Firefly and Photoshop JPEG files. It also has smaller synthetic fixtures for the format paths. We publish the hashes so the claim can be repeated.
Test file
Adobe Firefly · JPEG
Adobe Firefly 4.0 JPEG with a declared text-to-image action.
- Version
- 4.0.0-release-firefly_v4-main_78135.80468
- SHA-256
bdc5c19d4211…
Test file
Adobe Photoshop · JPEG
Adobe Photoshop 26.11 JPEG after crop and resize.
- Version
- 26.11.0
- SHA-256
17c9e5b9f40e…
Verified result
All three copies passed the production cleanup and reinspection paths. Their JPEG scan or PNG image payload hashes stayed unchanged.
ClearTags Lab documents each fixture's scope and publishes its complete hashes.
What this format cleaner separates
C2PA · EXIF · XMP · CONTAINERApplication segments
EXIF, XMP, IPTC, comments and supported APP11 C2PA data can be removed independently from the JPEG scan data.
Metadata chunks
EXIF, XMP/IPTC text, prompt-bearing text chunks, timestamps and supported caBX provenance can be selected separately.
Image content
Removing container metadata does not erase a watermark or signal encoded into the visible or invisible pixel data itself.
Clean a JPG or PNG locally
WORKFLOW / LOCAL COPY- 01
Choose the final image
Use the exact JPG or PNG intended for publishing, delivery or upload.
- 02
Inspect each section
Review C2PA separately from EXIF, XMP, IPTC, comments, prompts and timestamps.
- 03
Choose full or selective cleanup
Remove every supported metadata block or keep the authorship and rights fields you still need.
- 04
Verify the derivative
Reinspect the clean copy and compare its preview before downloading it.