Drag & drop your image
PNG, JPG, JPEG, GIF, WebP, SVG, AVIF • Max 25 MB
Privacy note: files never leave your browser. All analysis happens locally.
Image preview
Summary
- Dimensions
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- Aspect ratio
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- File size
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- Orientation
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- Megapixels
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- Format
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Detailed metadata
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How to use the image size checker
Checking image specs should take seconds, not minutes. Follow these steps to make sure every hero image, banner, or ad creative hits your target dimensions.
- Upload or drag the asset. Use the button or drop files straight into the dashed area.
- Check the summary panel. Confirm orientation, ratio, format, and file weight.
- Copy metadata if you need proof. Send it to QA, Slack, or your ticket thread.
- Reset and repeat. Audit an entire folder quickly without refreshing the page.
Use cases
Marketing & paid media teams
Validate banner specs before submitting to ad networks. Pair it with the HTML to Image tool to ensure exported sizes match required slots.
Front-end developers
Quickly inspect assets in pull requests to catch oversized hero images or mismatched retina exports early.
Design QA checklists
Include the tool inside QA docs so anyone can confirm that carousels, brand logos, and illustrations meet pixel-perfect guidelines.
Content management workflows
Editors can audit hero images, blog covers, and email banners before uploading them to CMS templates or the PDF to HTML converter.
Free online image size checker for designers and developers
Swapcode’s image size checker online shows exact dimensions, orientation, and file size for any asset in seconds. It’s the fastest way to confirm whether a banner meets a 1200×628 spec, if a social tile is really square, or if a client accidentally exported a blurry JPG. Because it runs entirely in the browser, you stay in control of confidential design assets.
Instant metadata for responsive workflows
Responsive layouts demand precise breakpoints. Use this image dimension checker to measure hero images, retina icons, and product shots before you upload them to your headless CMS or design system. The tool simplifies aspect ratios-like 16:9 or 4:5-so you instantly know if a creative fits Instagram, Pinterest, or landing-page slots.
Why fast QA matters
Launching campaigns often involves dozens of sizes. Instead of opening Photoshop or Figma every time, drop files into this free image resolution checker. You’ll see megapixels, estimated density, and file weight to make sure you’re not shipping 5 MB hero images that slow down conversions.
- Guarantee banner compliance for Google Ads, Meta Ads, and DSPs
- Share reproducible specs with developers or QA directly from the tool
- Catch wrong orientations before they break carousels or masonry grids
Ideal for remote approvals
Remote teams need shared proof. The copy and download buttons create tidy summaries you can drop into Jira, Linear, or Slack. Every record includes width, height, aspect ratio, format, orientation, and file size so stakeholders get the full picture.
Check image size without desktop software
The browser-based image size checker works on Chromebooks, tablets, and locked-down enterprise machines. You don’t need design software or command line tools-just open the site, drop a file, and get the info you need.
What about DPI and print?
While browsers don’t expose DPI values reliably, the tool reports megapixels and simplified aspect ratios, which help you estimate print readiness. If you need pixel density, combine the data with your printer’s DPI requirements to confirm whether a shot can stretch to posters or packaging.
Frequently Asked Questions
Which image formats are supported?
The checker supports any browser-friendly format (PNG, JPG, JPEG, GIF, WebP, AVIF, SVG, and more). If your browser can preview it, the tool can extract its width, height, and file size.
Does the image leave my computer?
No. The image size checker runs entirely in your browser. Files never leave your device, making it safe for private design assets or confidential mockups.
Can I check multiple images?
Yes. Add one image, review its metadata, then drop the next file. Results reset instantly, so you can audit entire folders without refreshing the page.
Does it calculate DPI or PPI?
Browsers do not expose DPI metadata reliably, but the tool reports megapixels and aspect ratios to help you infer quality for print or responsive layouts.
Can I export the results?
Use the Copy button to copy all metadata or the Download Report button to grab a JSON summary. Both options let you paste specs into tickets, briefs, or bug reports.