Quick answer
No upscaler can restore detail that a photo never captured, but you can enlarge an image 2×, 3× or 4× with little visible softness. FreeImageKit's Upscale Image offers fast resampling and an AI detail mode that runs a Real-ESRGAN model (about 67 MB, downloaded once) on your device. Start from the largest original and enlarge once.
Steps
- Open Upscale Image and select your original, not a screenshot or an already-compressed copy.
- Choose 2×, 3× or 4×, then pick Fast for instant resampling or AI detail for reconstructed texture.
- Download the result as PNG, JPG or WebP, and inspect it at 100% before using it.
Resampling versus AI detail
Resampling stretches existing pixels with interpolation. It is predictable and instant but looks soft at large factors. AI detail mode uses a neural network trained to add plausible texture, which usually looks sharper on photos and illustrations but can invent details that were not in the original.
Start from the best source
Every JPG re-save loses a little detail, and upscaling magnifies existing compression blocks. Use the original file, enlarge once, and compress only the final copy. Avoid upscaling a small image twice, because errors compound.
Where AI upscaling can go wrong
Faces, text, logos and fine repeating patterns can pick up odd textures. Check these at full size, and use Fast mode when fidelity matters more than apparent sharpness.
Limits on your device
AI detail mode accepts images up to 16 megapixels and 40 MB, and less on devices with little memory. The model downloads on first use, then is cached by your browser. Nothing is uploaded in either mode.
Frequently asked questions
Does AI upscaling restore the original detail?
No. It adds plausible detail based on patterns it learned, which can look convincing but is not a faithful reconstruction. Treat it as enhancement, not recovery.
Which scale should I choose?
2× is the safest. Larger factors magnify flaws and ask the model to invent more, so check 3× and 4× results carefully.
Is my image uploaded to be upscaled?
No. Both modes run in your browser, including the AI model.
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Keep reading
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This guide describes format behaviour and product capability, not a guarantee for every source image or third-party workflow. Keep your original files and verify important exports.