Image Dimensions Checker
Drop any image to instantly see its width, height, file size, format, and aspect ratio. No upload needed — everything runs in your browser.
Drop any image to check its dimensions
JPG, PNG, WebP, GIF — processed locally in your browser100% private
Images never leave your browser — all processing is local.
Full details
Width, height, aspect ratio, file size, format, and megapixels.
Instant
Results appear the moment you drop your image.
What is Image Dimensions Checker?
The Image Dimensions Checker is a free browser-based tool that instantly reveals the complete technical specifications of any image — including pixel dimensions (width and height), file size, file format, aspect ratio, resolution (DPI), megapixels, and color mode. Simply drop your image onto the tool and get all this information in under a second — without uploading the file to any server. This is useful for checking if an image meets social media platform requirements, verifying image quality before printing, or auditing images for web optimization.
How to use Image Dimensions Checker
- Step 1: Drop your image onto the tool or click to upload — JPG, PNG, WebP, GIF, and BMP are supported.
- Step 2: The tool instantly displays all image specifications: width, height, file size, format, aspect ratio, DPI, and megapixels.
- Step 3: Compare the displayed dimensions against the platform requirements shown in the reference table.
- Step 4: If the image needs resizing or conversion, use the appropriate MediaDrop image tool.
- Step 5: For batches of images — drop them one at a time to check each file's specifications.
Tips for better results
- Check before uploading to social media. Each platform has specific dimension requirements. Check your image dimensions before uploading to confirm they meet Instagram, YouTube, LinkedIn, or Twitter specifications without triggering automatic resizing.
- Use for web image optimization. Large images slow down web pages. Check file size and dimensions before using images on websites. Images larger than 1920px wide are unnecessarily large for most web uses.
- Verify print resolution (DPI). Print requires minimum 300 DPI for sharp results. Screen images are typically 72 or 96 DPI. Check DPI before sending images to print to avoid blurry results.
- Check aspect ratio for social media use. The aspect ratio displayed tells you immediately if your image matches the required ratio for your target platform (1:1 for Instagram square, 16:9 for YouTube thumbnails, 9:16 for Stories).
- No upload required — completely private. All checking happens in your browser using JavaScript. Your image never leaves your device — it is read directly from your local storage.
- Check both file size and dimensions. A 300×300px image with a 5MB file size is oversized for its dimensions — it likely has embedded metadata or unnecessary color profiles. Compress it before use.
Frequently Asked Questions
What information does the Image Dimensions Checker show?
The checker displays: pixel width and height, file size in KB or MB, file format (JPG/PNG/WebP/GIF/BMP), aspect ratio, DPI/PPI resolution, megapixels, and color mode (RGB, CMYK, grayscale).
Is my image uploaded to check its dimensions?
No. All checking happens in your browser using JavaScript. Your image is read directly from your local storage and analyzed in memory — it never leaves your device and is never sent to any server.
What image formats are supported?
The checker supports JPG, PNG, WebP, GIF, and BMP image files. Most common image formats used in social media and web design are supported.
Is the Image Dimensions Checker free?
Yes. Completely free with no signup and no usage limits.
What is a good image size for social media?
For Instagram posts: 1080×1080px (square) or 1080×1350px (portrait). For YouTube thumbnails: 1280×720px. For Twitter/X: 1200×675px. For LinkedIn posts: 1200×627px. The checker tells you if your image matches these specifications.