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Guides sur les formats d'image, analyses des performances web et l'ingénierie derrière une boîte à outils respectueuse de la vie privée.
Image SEO Checklist: 12 Things Most Sites Get Wrong
Image search drives 20-30% of total search traffic for many sites. Most miss easy wins — descriptive filenames, correct dimensions, lazy loading, structured data. Here's the full checklist.
Image Resolution Guide: Pixels, DPI, and PPI Explained
Image resolution explained: pixels vs DPI vs PPI. Learn what resolution means for web (72 DPI), print (300 DPI), social media, and how to set the right resolution for your use case.
WordPress Image Optimization 2026: Reduce File Size Before Uploading
Optimize images for WordPress to speed up your site and improve Core Web Vitals. Best dimensions, formats, and compression settings. Pre-optimize in your browser before uploading — no plugin required.
Image Metadata Explained: EXIF, IPTC, XMP and How to Remove Them
Understand what EXIF, IPTC, and XMP metadata is stored in your images. Learn what data is exposed (GPS location, camera model, date), why you should remove it before sharing, and how to strip metadata for free.
Image Lazy Loading: Native, Intersection Observer, and LCP Traps
loading="lazy" is one attribute but the implementation details matter enormously. Here's when to use native lazy loading, when to use JS, and the LCP trap that kills Lighthouse scores.
Email Marketing Image Size and Format Guide
Optimal image sizes for email campaigns: width, hero images, product photos, GIFs. Keep files small, use alt text, and avoid formats email clients block.
Progressive JPEG vs Baseline JPEG — Complete Guide 2026
Progressive JPEG renders gradually as it loads while baseline loads top-to-bottom. Learn when to use each, file size differences, and how to convert between them.
Image DPI for Printing — What Resolution You Actually Need
Image DPI for print: 300 DPI for photos and documents, 150 DPI minimum for posters, 72 DPI for screen only. Calculate the pixel dimensions you need for your print size.
Image File Formats Comparison: JPG, PNG, WebP, AVIF, GIF & More
Compare all major image formats — JPEG, PNG, WebP, AVIF, GIF, SVG, TIFF, HEIC. Find the best format for web, print, social media, and archiving with our complete comparison guide.
Lossy vs Lossless Image Compression: Which Should You Use?
Understand the difference between lossy and lossless image compression. Learn which formats use each type, when quality loss matters, and how to choose the right compression for photos, screenshots, logos, and web images.
DPI Explained: What Is DPI and Why Does It Matter for Images?
Understand DPI (dots per inch) and PPI (pixels per inch). Learn the difference between screen resolution and print resolution, why 72 DPI vs 300 DPI matters, and how to check or change DPI without losing quality.
Convert ICO to PNG Free Online — Extract Favicon Images
Convert ICO files to PNG format free online. Extract any size from multi-resolution ICO files, or convert favicon icons to high-quality PNG images instantly.