Process up to 200 images per job — pick your settings once, run them all.
Drop your image (or an image URL); get a SEO audit with actionable fixes. Missing alt text? Generic file name like 'IMG_4523.jpg'? Bigger than the page needs? Wrong format for the content? You'll see exactly what's wrong and what to do about it.
What we check
- File name SEO. Descriptive vs generic. 'red-tractor-john-deere.jpg' beats 'IMG_4523.jpg' for image search ranking.
- File size. Bigger than needed for the displayed dimensions = page-load penalty. We flag oversized.
- Format choice. Photo as PNG = wasteful (should be JPG/WebP). Logo as JPG = lossy edges (should be PNG/SVG).
- Dimensions. Are you serving 4000px wide for a 400px display slot?
- EXIF baggage. Camera metadata bloating the file with no SEO benefit.
- Compression quality. JPEG quality > 92 = wasted bytes; quality < 65 = visible artefacts.
- Colour profile. Web should be sRGB; embedded ICC profiles add KB without browser benefit.
What we don't check (and why)
Alt text lives in your HTML, not the image file. We can suggest alt text from the image content — see our Alt Text Generator — but the audit can't read your page's actual alt attribute unless you provide the page URL.
Acting on the findings
Bulk audits
Premium accounts can run audits across an entire URL or sitemap and get a CSV report of issues per image. Useful for site-wide audits before a Lighthouse run.
Frequently asked questions
What's the ideal image size for the web?
Whatever the slot displays at, times your DPR (typically 2x). A 400px slot needs an 800px-wide image, not 4000.
Are descriptive file names a real ranking factor?
Yes for image search (Google Images). Less for general web ranking, but it's free upside and accessibility wins.
What's WebP vs AVIF for SEO?
Either is fine — both faster than JPG. WebP has better browser coverage; AVIF is smaller. Pick one and use a fallback.
Does the tool check alt text on my page?
Provide the page URL (premium); we'll fetch and audit. Image-only audit can't see your page's HTML.
What about lazy loading?
We flag it as a recommendation, not part of the image audit per se. Use loading='lazy' on non-hero images.
Can I export the audit as PDF?
Yes — premium accounts can export a branded PDF for client deliverables.
What about responsive images?
We recommend the <code>srcset</code> attribute for sizes; the audit doesn't check your HTML unless you provide the page URL.
Are uploads private?
Yes — deleted within 24 hours.
About Image SEO Checker
Image SEO Checker is a free online tool from Wallpapers.com that runs entirely in your browser — no install, no watermark, no email sign-up for the first try.
Audit any image for SEO: file size, dimensions, alt-text suggestions.
How to use Image SEO Checker
- Drop your image into the upload area (single or batch — toggle Bulk at the top).
- Pick any settings the tool exposes (size, format, quality).
- Click Run. The result downloads automatically — no manual save step.
When to use it
Common use cases include:
prepping images for web upload, e-commerce listings, social media platforms with format constraints, and converting files from one device or app to another.
Free vs Premium
Every visitor gets a free trial run; signed-in free users get a higher daily quota. Subscribe to
Premium
for unlimited runs, bulk processing up to 200 images per job, priority queue, and ad-free browsing.
Related tools
Looking for something slightly different? Try the
JPG Compressor
,
PNG Compressor
or
WebP Compressor
— or browse all
Compression tools.
