Image & Media · Free tool
Image Format Converter
This tool converts images between JPEG, PNG, and WebP formats. WebP typically achieves 25-35% smaller file sizes than JPEG at equivalent visual quality, and supports transparency (unlike JPEG). Converting existing image libraries to WebP is one of the highest-impact page speed optimizations available.
SEO, GEO & AEO: why this checklist matters
Who should use this
Web developers optimizing page speed, content teams maintaining image libraries, and site owners working through Google Lighthouse recommendations.
Rankings, AI answers, and citations
Image optimization is one of the most impactful Core Web Vitals improvements available. LCP (Largest Contentful Paint), a confirmed ranking signal, is often determined by the largest image on the page. Converting hero images and featured images to WebP can meaningfully improve LCP scores.
What to verify before you ship
- Use WebP for web; keep PNG or TIFF originals as archival copies
- Set a fallback <source> element with JPEG or PNG for browsers that don't support WebP
- Use 80-85% quality for JPEG/WebP; 100% is rarely needed and increases file size significantly
- Compress images before or during conversion — the format change alone isn't always sufficient
What you can expect next
Use this workflow on drafts and live URLs. For continuous monitoring across Google and AI surfaces, pair results with Linkstonic SEO audit, AI tracking, and TrueTrace.
Frequently asked questions
Written for search snippets, People Also Ask-style surfaces, and answer engines that quote short Q&A units.
Should I always use WebP?
For web use, WebP is the right choice for most images. Use JPEG for photos without transparency where maximum compatibility is needed. Use PNG when exact color accuracy, transparency, or lossless quality are required. Use WebP as the primary format with JPEG/PNG fallbacks.
What is the difference between lossy and lossless compression?
Lossy compression (JPEG, WebP lossy mode) permanently removes some image data to achieve smaller files. Lossless compression (PNG, WebP lossless mode) reduces file size without data loss. Web images almost always benefit from lossy compression at 80-85% quality.
Does image conversion affect SEO?
Indirectly, through page speed. Format choice affects file size which affects loading time which affects Core Web Vitals. Serving correctly sized and formatted images is one of the most consistent Lighthouse recommendations for real-world sites.
What is AVIF and should I use it?
AVIF is a newer format with better compression than WebP (typically 50% smaller than JPEG at equivalent quality). Browser support is growing but not yet universal. Implementing AVIF with WebP and JPEG fallbacks using the picture element is technically correct but complex to maintain.