Image Metadata Viewer
View hidden EXIF metadata in any image. See camera, GPS, and editing data.
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What is Image Metadata Viewer?
Image Metadata Viewer is an open-source diagnostic utility designed to read, parse, and render hidden metadata structures embedded inside digital image files. When a camera captures an image, it writes binary data streams into dedicated application markers within file formats like JPEG, TIFF, WebP, and HEIC. This tool solves the challenge of inspecting these underlying data segments without requiring complex command-line software. The core functionality relies on accepting raw image binary files as input and parsing key-value pairs stored across various metadata standards, including EXIF, IPTC (International Press Telecommunications Council), and XMP (Extensible Metadata Platform). The output is rendered as a clean, structured visual breakdown, turning raw byte arrays into human-readable tables containing camera details, timestamp records, and geographic coordinates. First, the utility extracts hardware-level optical data, revealing exact exposure parameters such as an aperture of f/2.8, a shutter speed of 1/1000th of a second, and an ISO rating of 400. Second, it decodes embedded GPS location markers, translating raw degrees, minutes, and seconds into decimal coordinates like 37.7749° N, 122.4194° W for instant geographic mapping. Third, it scans for post-processing traces, identifying software tags left behind by editing programs such as Adobe Photoshop 23.1 or Lightroom Classic. Unlike simple file property windows built into desktop operating systems—which often truncate metadata tags or omit detailed lens parameters—Image Metadata Viewer provides an exhaustive index of all APP1 and APP2 marker segments found in the source file.
How it works
When an image file is loaded into the system, the application executes a byte-level scan using JavaScript DataView interfaces. In JPEG files, for instance, the parser looks specifically for the 0xFFE1 marker byte sequence, which designates the start of an APP1 metadata segment. Upon locating this marker, the script parses the subsequent TIFF header to determine the byte alignment—either little-endian (0x4949) or big-endian (0x4D4D). Consider an example image named PHOTO_1024.JPG. The parser reads byte offset 0x0000 to confirm the 0xFFD8 Start of Image (SOI) tag. Moving forward to offset 0x0002, it finds marker 0xFFE1, reads the offset length, and parses the Image File Directory (IFD0). It reads tag 0x8827 as ISO speed 200, tag 0x829A as Exposure Time 0.002 seconds (1/500s), and tag 0x8825 pointing to the GPS IFD structure, where it retrieves raw location vectors. The application code relies on structured TypeScript modules using standardized web binary standards such as ArrayBuffer, Blob, and FileReader. The binary decoding engine evaluates image buffers natively in execution memory, avoiding network overhead or reliance on external cloud microservices. Browser engines supporting ECMAScript 2020 or higher can process multi-megabyte image arrays in milliseconds. Because processing occurs directly inside client memory contexts without sending binary payloads over network sockets, bandwidth usage is minimized. If you need to inspect network payload formats or verify API responses, consider testing with our JSON formatter tool.
How to use it
- 11. Locate your target image file (for example, sample_photo.jpg, size 4.5 MB) on your local storage drive.
- 2Drag and drop the file into the primary file input dropzone, or click 'Select File' to open the system file picker dialog.
- 3Observe the generated 'Overview' panel, which displays primary shot information including camera make (e.g., Canon), model (e.g., EOS R5), and exposure settings (f/1.8, 1/250s, ISO 100).
- 44. Select the 'GPS & Location' tab to inspect extracted geographical markers. If spatial data is present, view the latitude (e.g., 48.8584) and longitude (e.g., 2.2945) values.
- 5Click the 'Export Metadata' button to download a structured sample_photo_metadata.json file containing every parsed metadata tag for offline documentation.
- 6A frequent point of confusion arises when analyzing images downloaded from popular social messaging applications. Services such as WhatsApp, Twitter, and Instagram systematically strip EXIF headers during server-side compression to protect user privacy and reduce file sizes. If an image has passed through these networks, metadata tags will show as completely empty.
- 7To achieve the most complete output, always load original, uncompressed files straight from the camera memory card or primary device storage. If you suspect an image has undergone alterations or compression, compare the camera tags against file creation timestamps to detect discrepancies.
What it can do
- Image Processing
Use cases
Assumptions and limitations
Assumptions
- source: https://github.com/image-metadata-viewer
- license: Open source
- privacy: Opens an external demo
Limitations
- The utility cannot recover missing EXIF headers if an image has been stripped by messaging apps; for stripped files, you must obtain the original camera raw file.
- File format support is restricted to standard web graphics like JPEG, PNG, TIFF, and WebP; for proprietary camera RAW files like Canon .CR3 or Nikon .NEF, utilize dedicated desktop tools like ExifTool.
- Video file formats such as .MP4 and .MOV are not parsed; for inspecting QuickTime metadata atoms, use video inspection tools such as ffprobe.
- High-resolution files exceeding 150 MB may cause brief memory spikes during client-side ArrayBuffer allocation; for gigapixel graphics, split the file or process via terminal scripts.
- Files with active encryption or corrupt APP1 marker segments will trigger parsing errors; re-export the file in standard JPEG format to rebuild damaged headers.
Understanding the result
View hidden EXIF metadata in any image. See camera, GPS, and editing data.
Tool details
- Clearly flagged when a network request is needed.
- No account, no sign-up, and no tracking of your content.
- Powered by image-metadata-viewer (MIT).
- Built with
- image-metadata-viewer (https://github.com/image-metadata-viewer)
- License
- MIT
- Runs locally
- No — requires a network request
- Verification
- Not yet verified
- Input
- Image
- Output
- Image
Built with https://github.com/image-metadata-viewer. OpenToolVault provides the discovery and browser interface while crediting the original project maintainers.
- Built with
- image-metadata-viewer
- License
- MIT
Open-source project
OpenToolVault is an independent directory. We are not affiliated with or endorsed by this project.
References
- /image-metadata-viewer — GitHub Repository
Upstream project · GitHub
Frequently asked
Why is the GPS location data missing when I inspect my smartphone photo?
GPS location data is only written to an image header if location services were actively enabled for the camera application at the exact moment of capture. Furthermore, many modern smartphone operating systems allow users to strip location markers when sharing media files. If the photo was transferred through messaging applications like Telegram or messaging apps, the platform automatically purges geographic tags during compression. To preserve location data, transfer files directly via physical cable or full-fidelity cloud storage.
How does the Image Metadata Viewer extract EXIF data without uploading my photo?
The viewer runs entirely in your browser using a client-side JavaScript parser. When you select a file, it is read into memory via the FileReader API and parsed locally — nothing is sent to a server. The EXIF, IPTC, and XMP blocks are decoded in-browser, which means your photo and its embedded location data never leave your device.
What camera and editing metadata can I see with this tool?
You can inspect the full EXIF block including camera make and model, lens, exposure time, aperture, ISO, focal length, and flash settings, plus date and time stamps. It also reads GPS coordinates when present, thumbnail data, orientation flags, and color profile information, and it can surface editing history fields written by tools like Photoshop or Lightroom.
How is reading metadata from a photo different from just viewing the image?
Normal image viewers only render pixels and rarely expose embedded metadata. This tool parses the binary file structure to surface the EXIF, IPTC, and XMP segments that travel alongside the image data. Those segments hold camera settings, copyright and author fields, GPS coordinates, and editing history that are invisible in a normal viewer but important for forensics, privacy checks, and cataloging.
Can I remove or clear metadata from my images using this tool?
No — this tool is read-only. It only inspects and displays the metadata embedded in your image. If you want to strip EXIF and GPS data before sharing a photo, you need a dedicated metadata remover or exif-stripping tool, which rewrites the file without those blocks.