High-quality visuals are vital for engaging readers, but oversized or poorly optimised files can slow your blog, hurt Core Web Vitals and reduce AdSense revenue. Follow these practical tips to convert and serve images so they load fast, rank well, and keep your audience—and Google—happy.
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| Image SEO |
1 │ Pick the Optimal Format
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WebP – Lightweight and crisp; ideal for most photos and graphics.
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JPEG – Great for photo galleries when you need broad backward-browser support.
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PNG – Reserve for graphics that require true transparency or pixel-perfect edges.
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SVG – Best for logos and icons that must scale without losing clarity.
2 │ Resize Before You Upload
Export each image at the exact width it will appear in your Blogger template. Serving a 4000-pixel photo inside a 600-pixel container wastes bandwidth and slows Largest Contentful Paint (LCP).
3 │ Compress Without Killing Quality
Aim for these size targets:
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In-post graphics: ≤ 80 KB
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Feature images: ≤ 200 KB
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Full-width hero banners: ≤ 300 KB
Use a conversion tool that lets you adjust compression until the image still looks sharp on a Retina screen.
4 │ Use Descriptive, Keyword-Rich File Names
Rename files before upload—e.g., seo-image-conversion-tips.webp—instead of IMG_4582.jpg. Clear names help Google understand context and improve Image Search visibility.
5 │ Write Helpful ALT Text
Describe the image in natural language and include your primary keyword only if it fits organically:
“Diagram showing WebP outperforming JPEG on file size and load time.”
ALT text boosts accessibility, supports visually impaired visitors and signals relevance to search engines.
6 │ Enable Lazy Loading
Blogger now supports loading="lazy" automatically. Lazy-loaded images defer off-screen downloads, improving first-paint speed and Core Web Vitals—key factors in AdSense’s viewability metrics.
7 │ Serve Responsive Sizes with srcset
If your theme permits, provide 320 px, 640 px and 1280 px variants. Mobile users get smaller files, desktop visitors enjoy sharper pictures, and everyone sees faster pages.
8 │ Keep an Original Backup
Store full-resolution originals in cloud storage. If you redesign or need larger assets later, you won’t be stuck enlarging compressed versions.
9 │ Test With PageSpeed Insights
After swapping images, run Google PageSpeed Insights. Confirm that “Serve images in next-gen formats” warnings disappear and LCP scores improve. Better speeds mean higher user satisfaction and potentially better AdSense RPM.
10 │ Automate Where Possible
Install a trusted optimisation plugin or connect an image-conversion API. Automation ensures every future upload is resized, compressed and converted to the best format without extra work.
Final Word
Smart image conversion is one of the easiest ways to accelerate your Blogger site, boost SEO and maximise AdSense earnings. By choosing the right format, resizing intelligently and adding clear metadata, you’ll deliver lightning-fast pages that delight readers and advertisers alike. Start applying these best practices today and watch your load times—and revenue—improve.
