MELTFLEX
AI Image Upscaler

Upscale a renderor room phototo 4K

Upload a render or photo and pick 1K, 2K or 4K. MeltFlex re-renders it at the higher resolution with sharp textures for print, boards and listings.

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213,000+ users worldwideGot their homes reimagined.
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The Same Render at 100%, Before and After 4K

AI Image Upscaler: 1k
1K
AI Image Upscaler: 4k, made with MeltFlex
4K

What this tool actually produces

Every image below came out of MeltFlex Image Upscaler, from one render or photo.

AI Image Upscaler: library books afterAI Image Upscaler: library books beforeAI Image Upscaler: red cloud rug after

Frequently Asked Questions

How does the AI image upscaler work?

Upload a render or a photo and pick 1K, 2K or 4K. The MeltFlex image model is asked for the same picture again at that size in a single call, with one fixed instruction: keep the room, furniture, materials, colours, lighting and camera exactly as they are and only increase the resolution.

Should I pick 1K, 2K or 4K?

4K for print, presentation boards and anything shown on a large screen at full size: a 16:9 picture comes back 5504 by 3072, which prints 46 cm (18 in) wide at 300 dpi. 2K is 2752 wide, enough for social media, a website hero and email, and the file is a quarter of the size.

Will it change my picture?

MeltFlex re-renders it, so it is not a pixel-for-pixel copy. Measured on 100 percent crops of the same renders, it held the composition, the materials, the marble veining and even the lettering on a wall poster, but a small object can shift slightly and a fabric pattern can be redrawn.

What is the largest image I can upscale?

Uploads go in at up to 4096 pixels on the long side. MeltFlex always returns its 4K frame in your picture's aspect, 5504 by 3072 at 16:9 and 4096 by 4096 square, about 16 megapixels, however large the input was.

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API & MCP

Use MeltFlex from your own app, or from Claude, ChatGPT and Cursor: https://www.meltflexai.com/api/mcp

Try AI Image Upscaler

Upload one photo on meltflexai.com and see the result in seconds. Your first design is free.

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