Remove PNG Metadata, Prompts and Text Chunks
PNG files can carry text as well as pixels. If an image generator writes a prompt or workflow into that text, sharing the file can share those details too. Remove AI Detection From Image reads supported PNG metadata and lets you choose which blocks to remove.
Open the free image metadata cleaner →Where PNG metadata is stored
The PNG specification defines tEXt, zTXt and iTXt chunks for textual information. Some text is compressed. A generator can use these containers for parameters or workflow details, but the presence of a text chunk alone is not proof of AI generation.
Remove AI Detection From Image labels these blocks by their chunk type and previews their text. It also recognizes PNG eXIf, tIME and caBX blocks. A binary block may be removable even when a field-level preview is unavailable.
Remove prompts from a PNG
Start with the original export, because a previously shared or edited copy may no longer contain the same metadata.
- Select your PNG in the homepage tool.
- Expand each text block and look for the information you want to remove. A field named parameters or workflow may contain more than a short prompt.
- Select the relevant blocks and click Clean. Selection removes an entire block, not one line of its text.
- Review remaining metadata and download the PNG copy.
What stays in the image?
The cleaner preserves image payloads, transparency and color information instead of drawing the picture onto a canvas and exporting it again. Necessary EXIF orientation is also kept. You can compare the original and cleaned file sizes in the result panel.
Unknown PNG chunks are preserved. This is a targeted cleaner for supported metadata structures, not a promise to strip every ancillary chunk. It does not remove visible text, pixel-based watermarks or details inside the artwork.
Why a prompt might not appear in the preview
The image may never have contained a prompt, or another tool may have removed it. The current preview also has limits: it shows up to 4,096 characters and caps decompressed text at 64 KB per block. If a compressed block exceeds the limit, it is still available for removal.
A metadata-free export is not proof of human authorship. Reopen the downloaded file to check supported blocks, and keep a separate original if you need the generation settings for reproducibility.