Image Metadata Viewer
Read filename, file size, dimensions, aspect ratio, megapixels, and file type from any image.
Image metadata viewer reads key information from any uploaded image without sending the file to a server. Upload any image to see filename, file size, pixel dimensions, aspect ratio, megapixel count, file type, and last modified date. All processing runs in the browser using the FileReader API and a native Image element.
Drop an image here or click to upload
JPG, PNG, WebP, GIF, AVIF and more
Your image is read entirely in your browser and never uploaded to any server.
Frequently Asked Questions
- What metadata can I read from an image?
- The viewer reads filename, file size, pixel dimensions, aspect ratio, megapixel count, MIME type, and last modified date. For full EXIF data (GPS location, camera model, shutter speed), use a dedicated EXIF reader.
- What is image resolution in megapixels?
- Megapixels is width multiplied by height divided by one million. A 4000 × 3000 image has 12 megapixels. Higher megapixels means more detail but also a larger file size. Typical smartphone cameras capture 12 to 50 megapixels.
- What is aspect ratio in images?
- Aspect ratio is the proportional relationship between width and height. Common ratios include 16:9 (widescreen video), 4:3 (older TV and cameras), 1:1 (square, used in Instagram), and 3:2 (DSLR standard). The viewer shows the simplified ratio.
- Is the image uploaded to a server?
- No. The image is read entirely in the browser using the FileReader API. No data is transmitted to any server. You can use this tool offline after loading the page.
- Does the tool show GPS location from photos?
- No. GPS location and other EXIF fields require parsing the binary EXIF block embedded in JPEG files. Only the basic file-level and display-level metadata available through browser APIs is shown.
What is image metadata?
Image metadata is information about an image stored alongside the pixel data. File-level metadata includes filename, file size, and last modified date. Image-level metadata includes pixel dimensions, color depth, and compression type. EXIF metadata includes camera model, GPS coordinates, shutter speed, and ISO value.
The viewer focuses on the file-level and display-level fields most users need: size, dimensions, aspect ratio, and megapixels. All of these are available through the browser's FileReader API and native Image element, with no server upload required.
How the viewer works
Drag and drop an image onto the viewer or click to browse and select a file. The FileReader API reads the file to get filename, size in bytes, MIME type, and last modified timestamp. The image then loads into a native Image element to measure its natural width and height in pixels.
Megapixels are computed as (width × height) / 1,000,000, rounded to two decimal places. Aspect ratio is derived from the GCD of width and height, then simplified to the lowest integer pair.
Understanding image dimensions and file size
Image dimensions describe how many pixels the image contains. A 1920 × 1080 image has 1,920 pixels across and 1,080 pixels down. Multiplying gives 2,073,600 pixels, or about 2.07 megapixels.
File size and pixel count are related but not equal. A compressed JPEG can store a 12-megapixel image in under 3 MB. An uncompressed TIFF or BMP of the same dimensions could be 36 MB. The compression algorithm and quality setting determine how much pixel data is reduced.
For web use, image dimensions matter for display and layout. A 4000 × 3000 image displayed at 800 × 600 on a webpage wastes bandwidth. Check dimensions before uploading to confirm the image matches the target display size.
Tips for reading image metadata
- For social media uploads, check dimensions before posting. Facebook and Instagram compress images above their size limits. Upload at the correct dimensions to avoid recompression artifacts.
- Megapixel count does not equal print quality. Print resolution depends on DPI, not total pixels. A 12 MP image at 3000 × 2400 pixels prints well at 10 × 8 inches at 300 DPI.
- To strip EXIF metadata including GPS location before sharing a photo, use the Image Compressor or Image Resizer tool. Both re-encode the image and remove embedded EXIF blocks.
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