# cloudphoto

> Image transformation, optimization and caching service (image CDN) for websites and applications, driven entirely by URL parameters. You stack width, format, filters and cropping into the URL of a source image; cloudphoto transforms it on the fly, signs the URL with HMAC-SHA256, serves it as WebP or AVIF from a global CDN and caches it for a month. No SDK, no server to manage.

cloudphoto is developed by immosquare. Billing is pay-as-you-go: you only pay for the CDN transfer actually delivered to visitors (egress), per GB — transformations and storage included, with no subscription or commitment. Free 15-day trial, no credit card required.

## Pages

- [Home](https://cloudphoto.io/fr): Product overview, interactive demo of the transformations, WebP/AVIF file-size comparison, pay-as-you-go pricing and FAQ.
- [Pricing](https://cloudphoto.io/fr/pricing): Pay-as-you-go pricing billed on CDN egress per GB, what's included, monthly cost examples and why usage-based beats subscriptions.
- [WebP & AVIF conversion](https://cloudphoto.io/fr/features/webp-avif): Serve the lightest format each browser supports via format=auto — up to 99% smaller than JPEG, no reencoding.
- [Responsive images](https://cloudphoto.io/fr/features/responsive-images): Generate a full srcset from one source URL; each screen gets the right width, cached on demand.
- [Image CDN & cache](https://cloudphoto.io/fr/features/image-cdn): Transformed images cached for a month and served from the nearest multi-region edge.
- [Signed URLs (HMAC)](https://cloudphoto.io/fr/features/signed-urls): Every transformation is HMAC-SHA256 signed — only your authorized URLs are served, keeping egress costs under control.
- [Resize & crop](https://cloudphoto.io/fr/features/resize-crop): On-the-fly resizing, content-aware cropping, gravity and retina DPR from URL parameters.
- [Filters & effects](https://cloudphoto.io/fr/features/filters): Grayscale, sepia, blur, sharpen, pixelate and more, chained in a single URL.
- [Blog](https://cloudphoto.io/fr/blog): Articles on web performance, image optimization and SEO (Core Web Vitals, WebP/AVIF, CDN, page speed).
- [FAQ](https://cloudphoto.io/fr/faq): Answers on integration (no SDK, any language), billing, security (HMAC signed URLs), formats (WebP/AVIF) and storage.
- [Contact](https://cloudphoto.io/fr/contact): Contact form for a demo or questions about integration.

## Solutions

- [Image CDN for WordPress](https://cloudphoto.io/fr/solutions/wordpress): WebP/AVIF and CDN cache via URL, no heavy plugin or thumbnail regeneration.
- [Image CDN for Shopify](https://cloudphoto.io/fr/solutions/shopify): Faster product visuals in WebP/AVIF, right size per screen, URL-driven.
- [Image CDN for Ruby on Rails](https://cloudphoto.io/fr/solutions/rails): Signed URLs via a helper, no server-side image pipeline.
- [Image CDN for Next.js](https://cloudphoto.io/fr/solutions/nextjs): Custom next/image loader; offload optimization to the CDN.
- [Image CDN for Webflow](https://cloudphoto.io/fr/solutions/webflow): Lighter pages by pointing image tags to cloudphoto, design untouched.
- [Image CDN for real estate](https://cloudphoto.io/fr/solutions/immobilier): Fast, sharp property photos; galleries from one source, built for volume.
- [Image CDN for e-commerce](https://cloudphoto.io/fr/solutions/ecommerce): Fast product visuals across any platform; costs controlled by signed URLs.

## Glossary

- [What is an image CDN?](https://cloudphoto.io/fr/glossaire/cdn-images): Definition and how an image CDN transforms, optimizes and caches images.
- [AVIF vs WebP](https://cloudphoto.io/fr/glossaire/avif-vs-webp): How the two next-gen formats compare and why to serve the lightest per browser.
- [LCP (Largest Contentful Paint)](https://cloudphoto.io/fr/glossaire/lcp): What LCP is, its threshold, and how images affect this Core Web Vital.
- [Signed URL (HMAC)](https://cloudphoto.io/fr/glossaire/url-signee): What a signed URL is and why it protects image transformation costs.

## Features

- URL-driven transformation — width, height, format, filters and cropping stack up as URL parameters, compatible with any language or framework, with no dependency to install.
- Smart resizing & cropping — fit, gravity, content-aware cropping and retina DPR for the right framing on every screen.
- Next-generation formats — WebP by default, AVIF, or automatic format: each browser receives the lightest format it supports.
- Filters & effects — grayscale, sepia, blur, sharpen, pixelate, vignette, rotation, chained together in a single URL.
- Responsive images — one srcset, one URL per width; each variant is generated and cached on demand, served according to the visitor's screen.
- HMAC-SHA256 signed URLs — every URL is signed with the token's secret, which prevents the generation of unauthorized variants and keeps costs under control.
- Global CDN + cache — multi-region processing and a one-month cache: the visitor receives the closest image, instantly.
- Flexible storage — point to any source URL (Amazon S3, EC2, shared hosting, public site) or use the included image storage, without migrating anything.

## Performance

- File-size reduction of 84 to 99% per image, up to 99% on a typical product photo (2.41 MB → 143 KB in AVIF).
- Less weight means a faster LCP, better SEO and a lower bandwidth bill — without changing a single line of the existing HTML.

## Pricing

- Pay-as-you-go model billed monthly on actual egress, per GB delivered. No subscription, no tiers, no commitment.
- Included: unlimited transformations and filters, all formats (WebP, AVIF, JPG, PNG), multi-region CDN + cache, HMAC signed URLs, image storage, dashboard and real-time CDN logs.
- Free 15-day trial, no credit card required.

## Documentation

- [Technical documentation](https://docs.immosquare.com/cloudphoto): Reference for URL parameters, v2 HMAC signing and integration examples (hosted on docs.immosquare.com).

## Blog posts
- [Checklist performance web : optimiser images et chargement](https://cloudphoto.io/fr/blog/checklist-performance-web-optimiser-images-et-chargement--1039): Une checklist concrète pour accélérer un site en optimisant d'abord les images et le chargement, les deux postes au meilleur rapport effo...
- [Vitesse de site et taux de conversion : l'impact business](https://cloudphoto.io/fr/blog/vitesse-de-site-et-taux-de-conversion-l-impact-business--1037): Un site plus rapide convertit davantage. L'impact business concret de la performance web sur le rebond, la conversion et le chiffre d'aff...
- [Optimiser le LCP : soigner l'image « above the fold » (héros)](https://cloudphoto.io/fr/blog/optimiser-le-lcp-soigner-l-image-above-the-fold-heros--1035): L'image de héros est souvent l'élément mesuré par le LCP. Comment la soigner pour afficher vite et bien la partie visible d'une page.
- [Comment un CDN d'images accélère un site partout dans le monde](https://cloudphoto.io/fr/blog/comment-un-cdn-d-images-accelere-un-site-partout-dans-le-monde--1033): Un CDN d'images sert chaque visiteur depuis le serveur le plus proche. Comment ce réseau accélère un site partout dans le monde.
- [Images responsive : srcset, tailles et DPR pour ne servir que le nécessaire](https://cloudphoto.io/fr/blog/images-responsive-srcset-tailles-et-dpr-pour-ne-servir-que-le-necessaire--1031): srcset, sizes et DPR permettent de servir à chaque écran la juste taille d'image. Le guide des images responsive pour ne rien gaspiller.
- [Le lazy loading des images : bonnes pratiques et pièges](https://cloudphoto.io/fr/blog/le-lazy-loading-des-images-bonnes-pratiques-et-pieges--1029): Le chargement différé accélère l'affichage initial, à condition d'éviter quelques pièges. Bonnes pratiques du lazy loading des images.
- [WebP et AVIF : adopter les formats d'image nouvelle génération](https://cloudphoto.io/fr/blog/webp-et-avif-adopter-les-formats-d-image-nouvelle-generation--1027): WebP et AVIF offrent la même qualité que le JPEG pour un poids bien moindre. Pourquoi et comment adopter ces formats d'image modernes.
- [Les images : premier poste de poids d'une page web](https://cloudphoto.io/fr/blog/les-images-premier-poste-de-poids-d-une-page-web--1025): Les images pèsent le plus lourd sur une page web. Comprendre d'où vient le gaspillage et comment réduire drastiquement leur poids.
- [Core Web Vitals expliqués simplement : LCP, INP et CLS](https://cloudphoto.io/fr/blog/core-web-vitals-expliques-simplement-lcp-inp-et-cls--1023): LCP, INP, CLS : les trois Core Web Vitals de Google expliqués sans jargon, avec des pistes concrètes pour améliorer chacun d'eux.
- [Pourquoi la vitesse de chargement est un facteur SEO décisif](https://cloudphoto.io/fr/blog/pourquoi-la-vitesse-de-chargement-est-un-facteur-seo-decisif--1021): La rapidité d'affichage n'est pas qu'un confort : c'est un signal de classement assumé par Google. Voici pourquoi la vitesse pèse sur vot...