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Estimateur de taille d'image — Outil en ligne gratuit

Prédis la taille du fichier avant l'export

Calcule la taille JPEG, PNG, WebP, AVIF selon dimensions et compression. Optimise avant de générer. Gratuit et sans inscription.

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Image file size estimator

Predict JPEG, PNG, WebP, AVIF file sizes before you export.

How to use this tool

  1. 1

    Enter dimensions

    Width × height in pixels.

  2. 2

    Pick format + quality

    JPEG, PNG, WebP, AVIF, or HEIC.

  3. 3

    Get predicted file size

    Before you export. Plan CDN bandwidth, web perf.

Frequently Asked Questions

How accurate is the prediction?
Within ±30% for photos. Illustrations and flat color are harder to predict (can be much smaller). File size depends heavily on image content — complex scenes = larger files than simple ones at same settings.
Which format to pick?
Photos: AVIF (best, new), WebP (near-universal), JPEG (fallback). Illustrations with transparency: WebP or PNG. Icons/simple graphics: SVG if possible. Animations: WebP > GIF.

À retenir

  • Image File Size Estimator is a free, browser-based ai tool — predict file size before export.
  • Non signup, no downloads, no file uploads. Outils run in your browser; the few that need an outside service say so on the page.
  • Works on desktop, tablet, and mobile. Install as a PWA for offline access.

How to Use Image File Size Estimator

  1. Open the tool: Launch Image File Size Estimator on Outilolis — no account or download needed.
  2. Enter your data: Paste text, enter values, or select a file directly in your browser.
  3. Get instant results: Everything is processed locally — results appear immediately.
  4. Copy or download: Save your output or share it. Bookmark for quick access next time.

Image File Size Estimator — Quick Facts

Prix
Gratuit — sans limites, sans filigrane, sans paywall
Confidentialité
Traité dans votre navigateur. Les outils qui ont besoin d’un service externe l’indiquent sur la page. Les visites sont comptabilisées (Google Analytics).
Plateforme
Tout navigateur moderne — desktop, tablette ou mobile
Catégorie
AI Outils on Outilolis
Hors ligne
Works offline after first visit (Progressive Web App)
CaractéristiqueDétails
OutilImage File Size Estimator
CatégorieAI
Inscription requiseNon
Téléversement de fichierAucun — traité dans le navigateur
Compatible mobileEntièrement adaptatif
CoûtGratuit pour toujours

Why Use Image File Size Estimator?

You should try Image File Size Estimator for a quick, private way to predict file size before export. Processing happens in your browser and files are never uploaded; the few tools that need an outside service say so on the page.

On the other hand, dedicated APIs or desktop tools suit batch processing better. They also handle server-side automation. For everyday tasks, browser tools offer the best speed, privacy, and convenience.

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100% Confidentialité. Cet outil fonctionne entièrement dans votre navigateur. Vos données ne sont jamais envoyées à un serveur.