GumakeGumake.

⚙️ Processed on our server in France — files deleted after 72 h. Free tool: the server rental is funded by your donations. Advanced features are metered in Gu tokens. ♥ Support us

Upscale an image without pixelation

AI super-resolution (Real-ESRGAN): boost the resolution ×2 or ×4, sharply. Perfect for turning a blurry cover into 300 DPI print quality — processed on our servers in France, files deleted after processing.

Drop one or more images, or click to choose

PNG, JPG or WebP — 20 MB max, batch processing supported

Upscale factor×2
drop an image

⚡ AI feature — requires Gu tokens (granted by the administrator).

🎯 Print target (DPI)

Set the scale to reach Amazon KDP's print resolution (bleed included, estimate).

The preview and before/after comparison will appear here.

🔒 Processed on our servers in France — files automatically deleted after 72 h.

✅ When to use it

  • Cover image too small for KDP's 300 DPI requirement
  • Low-resolution photo or illustration you need to print
  • Web image that looks pixelated when enlarged

⚡ How it works

  • AI feature: requires Gu tokens (granted by the admin)
  • Real-ESRGAN processing on our servers in France
  • Downloadable PNG result, files deleted after processing
KDP tip: in the DPI calculator, pick the image's role (illustration or full cover background) and your book's trim size — the tool sets the scale factor needed to reach print resolution.

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