Image Info Checker

How to use

1. Upload or drop any image onto the tool, results appear instantly without pressing any button.
2. Review the width, height, file size, format, aspect ratio and megapixel count.
3. Use the information to decide whether to resize, compress or convert the image before using it.

"Image size" means three different things

A lot of image confusion comes down to one word. When a form, a printer or a platform talks about the "size" of an image, it can mean three quantities that have nothing to do with each other.

• File size, in KB or MB. What the file weighs on disk. This is what a form limits when it says "maximum 2 MB". You change it by compressing.
• Dimensions, in pixels, for example 1920 × 1080. How many dots wide and tall the image is. This is what a platform limits when it asks for "at least 800 px". You change it by resizing.
• Print size, in inches or centimetres. Only exists when the image is printed, and depends on the pixels and the print resolution.

They are independent. An image can have huge dimensions and weigh very little, or be small in pixels and weigh a lot. That is why compressing does not always fix a rejection: if what you were asked for is pixels, compression leaves the dimensions untouched.

Print size is pixels divided by resolution. At 300 DPI, the usual print standard, a 3000 × 2100 pixel image prints at 10 × 7 inches. The same image at 72 DPI would cover more than 40 inches of width, but it would look pixelated. The pixels never change; what changes is how far you stretch them.

This tool shows all three at once, so you can see which one is actually blocking you. If the problem is pixels, use the image resizer. If the problem is megabytes, use the image compressor.

Tips for best results

• Check dimensions before uploading to any platform. Most platforms have strict size requirements, knowing your image's exact pixel dimensions prevents rejection or silent auto-cropping. Compare the aspect ratio to the platform's required ratio and use the image resizer to adjust it before uploading.
• Use file size to decide whether compression is needed. If the checker reports a file size above 200 KB for a web image, it is worth compressing before publishing. Run the image through the image compressor to reduce file size without visible quality loss.
• Check for metadata before sharing publicly. Images taken on a smartphone often contain GPS coordinates, device model and timestamps. Verify the file format here, then strip the embedded data with the EXIF remover before posting publicly.
• Estimate print size from pixel dimensions. To find the print size at 300 DPI, divide each pixel dimension by 300. A 3000×2100 image prints at 10×7 inches, use the megapixel count shown here to quickly assess whether an image has sufficient resolution for your target print dimensions.

Why use PixMidas

• Instant results. Metadata is extracted in under a second using browser APIs, no wait time.
• 100% private. The image is read locally, nothing is uploaded to any server.
• No account needed. Free. Metadata extraction runs locally on your device.

Frequently asked questions

How do I check the size and dimensions of an image?

Drop the image onto the tool. The width and height in pixels, the file size in KB or MB, the format, the aspect ratio and the megapixel count all appear immediately, with no button to press.

How do I find an image's file size without opening an editor?

Open this page and drop the file in. The file size in KB or MB appears alongside the pixel dimensions, format and aspect ratio, with no image editor to install and no account to create. It works the same way on a phone.

What information is shown?

Width and height in pixels, file size in KB or MB, image format (JPG, PNG, WebP, GIF etc.), aspect ratio as a simplified fraction (e.g. 16:9, 4:3, 1:1), and total megapixel count, everything you need to know before uploading to a platform or sending to a print shop. Knowing the aspect ratio upfront prevents unexpected crops when the image lands in a fixed-ratio container on a website or social platform.

What is a megapixel?

One megapixel equals one million pixels. A 4000×3000 image contains 12 megapixels (12 MP). Megapixels indicate the total pixel count and are a rough guide for print size, for a sharp 8×10 inch print at 300 DPI, you need a minimum of about 7.2 megapixels. High-megapixel images from modern cameras are often unnecessarily large for web use and benefit from resizing before upload, the image resizer can reduce them to web-appropriate dimensions without losing visible quality.

How does aspect ratio affect my use case?

Aspect ratio is the proportional relationship between width and height. Knowing the ratio tells you immediately whether an image fits a specific container (16:9 video frame, 4:5 Instagram post, 1:1 profile picture) without distortion. The wrong aspect ratio results in cropping or letterboxing on most platforms. When the aspect ratio doesn't match what a platform requires, resize and crop the image first, letting the platform auto-crop often produces unexpected results that aren't visible until after publishing.

Can this tool read EXIF metadata?

The Image Info tool shows pixel dimensions and file-level properties. For detailed EXIF metadata like GPS location, device model and camera settings, use the EXIF Data Remover, it shows a full breakdown of all embedded metadata before stripping it. EXIF data is particularly important to check before sharing images publicly, as smartphone photos routinely include precise GPS coordinates that reveal the exact location where the photo was taken.

Is my image uploaded anywhere?

No. Your image is read entirely by the browser using the File API and Image object. It is never uploaded to any server and is never included in any network request. The page loads its own code from pixmidas.com, and reading a HEIC file fetches a decoder the first time you need one, but your image is never part of those requests. This makes the tool safe for checking dimensions on confidential product images, client work or any file you need to keep private, the metadata extraction happens on your device, not on a remote server.