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SEO Analysis Tool

Image SEO Checker

Analyse your images for SEO optimisation. Get instant recommendations on file size, format, dimensions, alt text, and Core Web Vitals impact — plus rename and download your file with an SEO-friendly name.

No sign-up required100% client-sideRename & download fileDownload full report

Drop your image here or click to browse

Supports JPG, PNG, WebP, GIF, SVG, AVIF · Max 15 MB

Provide Alt Text for Analysis (Optional)

Enter the alt text you plan to use — we'll score it against SEO and accessibility standards.

Alt Text

Target: 50–125 characters0/200

Quick Checklist

Keep images under 100 KB for fast loading
Use WebP or AVIF for modern browsers
Write 50–125 character descriptive alt text
Name files with hyphens: red-shoes.jpg
Set width + height to prevent layout shifts
Use lazy loading for below-the-fold images

Score Breakdown

File Size25 pts

Format20 pts

Dimensions20 pts

Filename15 pts

Alt Text20 pts

Total100 pts

SEO-Friendly File Naming Rules

Your image filename is the first SEO signal Google reads. A descriptive, keyword-rich name can significantly improve image search rankings and contextual relevance for your page.

Use lowercase letters only

Avoid mixed case — URLs are case-sensitive on most servers.

✓ chocolate-cake-recipe.jpg

Separate words with hyphens

Google reads hyphens as word separators; underscores are ignored.

✓ blue-leather-sofa.webp

Include your target keyword

Put the primary keyword near the start of the filename.

✓ mens-running-shoes-red.jpg

Avoid generic or auto-generated names

Filenames like DSC_1234.jpg carry no SEO value at all.

✗ IMG_20240312_102233.jpg

Never use spaces or special characters

Spaces become %20 in URLs; symbols break links and confuse crawlers.

✗ my photo (1).jpg

Before & After Examples

DSC_04821.JPG

modern-kitchen-interior-design.jpg

Screenshot 2024.png

google-analytics-dashboard-2024.png

image001.webp

handmade-ceramic-coffee-mug.webp

Image SEO Best Practices

Follow these proven guidelines to optimise images for search engines and improve website performance.

Compress & Minimise File Size

Target under 100 KB for standard images
Compress JPEG to 80–85% quality
Remove all EXIF/metadata before upload
Use TinyPNG, Squoosh, or ImageOptim

Choose the Right Format

WebP: 20–30% smaller than JPEG
AVIF: up to 50% better compression
SVG for logos, icons, and illustrations
Provide JPEG fallbacks for older browsers

Write Descriptive Alt Text

Aim for 50–125 characters (8–15 words)
Describe image content and page context
Include target keyword naturally
Never start with "image of" or "photo of"

Use SEO-Friendly Filenames

Rename before upload — not after
Use hyphens, not underscores or spaces
Lowercase only; include primary keyword
Example: handmade-leather-wallet-brown.jpg

Optimise Dimensions

Never upload larger than needed
Max 1920px width for hero images
800–1200px for blog content images
Always add width + height HTML attributes

Technical SEO Implementation

Add lazy loading: loading="lazy"
Use srcset for responsive images
Serve via CDN for global speed
Add ImageObject schema markup

Impact on Core Web Vitals

Image optimisation directly affects Google's Core Web Vitals metrics that influence your search rankings.

LCP

Largest Contentful Paint

Large images often cause slow LCP. Optimise file size, use WebP, and lazy-load below-fold images to improve page loading speed.

Target: < 2.5 seconds

CLS

Cumulative Layout Shift

Images without dimensions cause content jumps. Always specify width and height attributes to reserve space while images load.

Target: < 0.1

INP

Interaction to Next Paint

Heavy image payloads block the main thread. Optimise file sizes and defer off-screen images to keep pages responsive to user input.

Target: < 200 ms

Frequently Asked Questions

Common questions about image SEO optimisation.

: The tool analyses five key SEO factors: file size (25 pts), image format (20 pts), dimensions (20 pts), filename conventions (15 pts), and alt text quality (20 pts). All processing happens client-side in your browser — nothing is ever uploaded to any server.
: 80–100 is excellent, 60–79 is good and competitive, 40–59 needs improvement, and below 40 requires urgent attention. Address critical issues and warnings to push your score into the excellent range.
: Yes — that's one of the key features. After analysis, the Rename & Download panel lets you enter an SEO-friendly filename, see live validation badges, and download the exact same image file with your new name applied. Nothing is modified except the filename.
: Aim for under 100 KB per image. Hero images can reach 200 KB, but content images should be 50–100 KB. Use WebP or AVIF format and compression tools like TinyPNG or Squoosh to hit these targets without sacrificing visible quality.
: WebP delivers 20–30% better compression than JPEG at equivalent visual quality — meaning faster page loads, better LCP scores, and lower bounce rates. Use WebP with a JPEG fallback via the HTML picture element for full browser compatibility.
: Aim for 50–125 characters (about 8–15 words). Describe what the image shows and its context on the page. Include your target keyword naturally, but only once. Avoid "image of", "photo of", and pure keyword comma-lists. Good alt text serves both screen readers and search crawlers equally.
: Yes, directly. Oversized images slow page load speed, hurting LCP. Images without explicit width and height attributes in HTML cause layout shifts (worsening CLS). Both are Google Core Web Vitals signals that directly influence search rankings.
: Completely. All analysis happens client-side in your browser using the File API. Your image bytes never leave your device — no upload, no server processing, no storage. The rename and download feature also works entirely locally.

Related Image Tools

Complete your image optimisation workflow.

Optimisation Analyzer

Deep performance analysis and compression recommendations

Convert to WebP

Convert JPEG and PNG to WebP for smaller file sizes

Resize Image

Resize to exact dimensions for optimal web delivery

Metadata Remover

Strip EXIF data to reduce file size and protect privacy

Optimise your images for better SEO

Get instant analysis, actionable fixes, rename your file, and download — free, no sign-up required.