Image Metadata Viewer

Read a png container (8×8) from 3 reported item(s).

How it works

• Identify the container from its magic bytes.
• Parse the container structure (PNG chunks, JPEG segments, WebP/GIF headers).
• Decode any EXIF/IPTC/XMP blocks with bounds-checked offsets.
• Report each field, marking absent fields explicitly rather than inventing them.

• Read-only: the file is never modified and nothing is uploaded.

Methodology

1. Identify the container from its magic bytes; an unrecognised file is reported as unknown rather than guessed.
2. Parse the container with bounds-checked offsets: PNG chunks, JPEG segments and APP1/APP13 blocks, WebP RIFF chunks, GIF/BMP headers.
3. Decode EXIF TIFF IFDs (IFD0, ExifIFD) and report known tags; a malformed segment is a named finding, never an exception.
4. Report only what is present; an absent field is shown with an explicit "not present" state.

Usage

1. Choose or drop a PNG, JPEG, WebP or GIF image.
2. Read the container summary, dimensions and colour depth.
3. Scan the EXIF, IPTC, XMP and PNG-chunk fields; absent fields are marked as such.

Examples

These are examples, not current values: they use fixed inputs, while the interactive tool computes live results in your browser.

8×8 PNG (IHDR)

{
  "mime": "image/png",
  "base64": "iVBORw0KGgoAAAANSUhEUgAAAAgAAAAICAYAAADED76LAAAAEklEQVR4nGP4z8DwHx9mGBkKAMLXf4EvceABAAAAAElFTkSuQmCC"
}

1×1 PNG (IHDR)

{
  "mime": "image/png",
  "base64": "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mP8z8BQDwAEhQGAhKmMIQAAAABJRU5ErkJggg=="
}

Limitations

Read-only by design

The viewer identifies the container from real bytes and parses EXIF/IPTC/XMP/PNG metadata with bounds-checked offsets, so a malformed segment is reported rather than crashing. It never modifies the file.

An absent field is shown as absent. Where a value cannot be decoded (for example a compressed PNG text chunk or an AVIF box), the tool says so plainly rather than fabricating a value.