Image SEO Checker
Analyze your images for search engine optimization. Check filename, format, file size, dimensions, and compression — get actionable recommendations to improve page speed and search rankings.
2,000+ images analyzed
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Filename Analysis
Checks whether your filename uses descriptive, hyphen-separated keywords that search engines can parse. Generic names like IMG_0001.jpg provide zero SEO value.
Size & Speed
Evaluates file size, dimensions, and compression efficiency. Oversized images slow page loads — a key factor in Core Web Vitals and search ranking.
Actionable Tips
Every issue comes with a specific fix — rename, resize, reformat, or compress. Copy the full report to share with your team or track optimization progress.
Why does image SEO matter?
Google Image Search drives significant traffic — often 20-30% of organic visits for visual content sites. Properly optimized images with descriptive filenames, appropriate dimensions, and modern formats rank higher in both image search and regular search results. Image file size directly impacts Core Web Vitals (LCP, CLS), which are ranking factors. This checker audits every dimension of image SEO in one scan. To compress images that fail the size check, use the Image Compressor. To resize oversized images, try the Image Resizer.
Image filename best practices for SEO
Search engines read image filenames as ranking signals. "red-bicycle-brick-wall.jpg" tells Google what the image shows; "IMG_4523.jpg" tells it nothing. Use 3-5 descriptive keywords separated by hyphens (not underscores — Google treats hyphens as word separators). Avoid generic names from cameras (DSC_, DCIM), screenshots, or downloads. Keep filenames lowercase and under 100 characters. This checker flags generic filenames and suggests improvements. For batch-checking metadata across multiple files, use the Batch Scanner. To view all embedded metadata, start with the EXIF Checker.
Choosing the right image format for web
WebP delivers 25-35% smaller files than JPEG at comparable quality and is supported by all modern browsers. AVIF offers even better compression but has narrower support. JPEG remains the safe default for photographs. PNG is best for images requiring transparency or sharp text/line art. BMP and TIFF are uncompressed formats that should never be used on the web. This checker flags suboptimal formats and suggests conversions. To convert between formats, use the Format Converter. For social media-specific dimensions, the Social Media Resizer generates optimized exports.
File size, dimensions, and page speed
Images are typically the heaviest resources on a web page. A 4000×3000 JPEG from a camera is 3-8 MB — but most web displays never exceed 1920px wide. Serving oversized images wastes bandwidth and slows Largest Contentful Paint (LCP). Aim for under 200 KB per image and resize to the actual display dimensions. This checker measures compression efficiency in bits-per-pixel and flags oversized files. For checking print-quality requirements instead of web, use the Print Readiness Scanner. To assess overall image quality metrics, try the Quality Analyzer. Learn more in our articles on social media image sizes and checking image quality.