Amplificateur de Résolution d'Image

Enlarge 2x or 4x while keeping the original look. Same format, text and UI stay sharp.

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PNG, JPG or WebP, max 25 MB. Download stays the same format.

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À propos de cet outil

This upscaler uses Real-ESRGAN, a free open-source AI model that reconstructs edges, text and texture, not just stretching pixels like a basic resize. On Chrome and Edge it runs on your GPU (WebGPU) so typical photos finish in a few seconds. Choose 2x or 4x output, compare before and after, and download when ready. The AI model loads once (~5 MB) on first use; your image never leaves your device and there is no usage limit.

Flux de travail

Sauver une image basse résolution

Agrandissez d'abord, puis nettoyez - agrandir un fichier compressé amplifie ses artefacts.

  1. 1AgrandirAgrandissez 2x ou 4x avec Real-ESRGAN.Vous êtes ici
  2. 2Affiner le renduAjustez le contraste et la couleur après l'agrandissement.Ouvrir
  3. 3CompresserUn fichier agrandi est volumineux - réduisez-le à nouveau.Ouvrir

Comment utiliser cet outil

  1. Add your imageDrop it in or browse to select. PNG, JPG or WebP up to 25 MB.
  2. Choose 2× or 4×2× is faster and enough for most thumbnails. 4× for maximum size.
  3. AI upscaleReal-ESRGAN runs on your GPU when available (WebGPU), otherwise on CPU, and rebuilds detail tile by tile.
  4. Compare and downloadDrag the preview slider, then download in your chosen format.

Pourquoi l’utiliser

  • Real-ESRGAN AI for sharper edges and clearer text than basic resize.
  • Before/after preview shows the real difference.
  • Private: images never leave your device.
  • Free, unlimited, no account or watermark.

Usages courants

  • Making a small logo or graphic usable at a larger size on a page.
  • Enlarging an old or low-resolution photo enough to print at a modest size.
  • Meeting a minimum-dimension requirement on a listing or submission form.
  • Scaling up a screenshot for a presentation where it would otherwise look tiny.
  • Preparing a small source image for a banner where some softness is acceptable.

Conseils pour de meilleurs résultats

  • Always start from the largest original you have. Upscaling a version that was already downsized compounds the loss.
  • Try 2× before 4×. Doubling often solves the problem with far less visible softening.
  • Graphics with flat colour and hard edges - logos, icons, line art - upscale much better than photographs.
  • If the source is a logo, check whether an SVG exists. Vector art scales infinitely with no loss at all, which beats any upscaler.
  • Judge the result at the size it will actually be used. An image that looks soft at 100% zoom may be perfectly fine printed small or viewed on a phone.

Erreurs à éviter

  • Expecting an upscaler to recover detail. Nothing can add information the camera never captured - "enhance" is a film trope, not a capability.
  • Using 4× on a very small image and being surprised by the softness. The bigger the jump, the more is invented.
  • Trying to fix a blurry photo by enlarging it, which enlarges the blur too.
  • Upscaling a heavily compressed JPG, where the compression artefacts get magnified along with the image.
  • Upscaling a logo when the original vector file exists somewhere - that always gives a perfect result instead of an approximated one.

Questions fréquentes

Add your image above, choose 2× or 4×, and download the enlarged result. Processing happens in your browser, so nothing is uploaded.

Yes. No account, no limit and no watermark on the output.

Sharpening and multi-pass resampling make edges and text look crisper, but no tool can invent detail that was never captured. A heavily compressed thumbnail will look noticeably cleaner and larger - not identical to a photo shot at that resolution.

No. Use it as many times as you want, for free. Processing runs on your device in seconds.

Chrome and Edge use your GPU (WebGPU) so typical photos finish in a few seconds, like desktop AI upscalers. The first run loads a 5 MB model once. Try 2x for the fastest result; 4x takes longer on very large photos.

2× or 4×. Beyond 4×, softening becomes obvious regardless of method, because too much of the result is estimated rather than measured.

No. Blur is enlarged along with everything else. Upscaling makes a small sharp image usable at a bigger size; it cannot make a soft image sharp.

Within limits. Print wants around 300 DPI, so a 1000-pixel image upscaled 2× gives roughly 6.7 inches at that density. It will look acceptable at normal viewing distance, but it will not match a photo shot at that resolution.

Very small or heavily compressed sources have little information to work with. Try 2× instead of 4×, use Auto or JPG output to avoid huge PNG files, and start from the largest original you have.

No. Upscaling runs in your browser, so the image stays on your device throughout.

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