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Why ordinary resizing can't add detail
When you enlarge a small PNG with a normal resize, the software simply stretches the pixels it already has. There is no extra information to work with, so edges go soft and fine detail turns into a blurry, blocky smear. This is true of every classic resizing method — there is genuinely nothing in the file to sharpen.
AI upscalers take a different approach. They have been trained on millions of images, so instead of stretching pixels they predict what the missing detail should look like and paint it in. The result is a larger image that looks convincingly sharp — skin texture, hair, foliage, and surfaces are reconstructed rather than blurred. It is a specialised job, and it is why a dedicated upscaler beats any ordinary resize for big enlargements.
The best AI image upscalers
1. Topaz Gigapixel AI — best overall quality
The leading desktop upscaler and the choice of many photographers and retouchers. Gigapixel AI runs locally, handles very large enlargements (up to 6x and beyond), and gives you fine control over models for faces, low-resolution sources, and compression artifacts.
Pros: top-tier results, batch processing, no upload required (private). Cons: paid, a one-time desktop purchase, and it needs a reasonably capable computer. Topaz Labs
2. Let's Enhance — best web-based all-rounder
A popular browser-based upscaler that needs no install. Upload an image, pick an enlargement factor, and download the result. It handles batches well and adds extras like noise removal and tone adjustments, which suits e-commerce and bulk product photos.
Pros: nothing to install, good batch workflow, solid on photos. Cons: credit-based pricing, and you have to upload your images to their servers. Let's Enhance
3. Upscale.media — best free quick upscale
A fast, freemium web tool for when you just need a single image enlarged without fuss. It is genuinely free to try, works in the browser, and is the easiest entry point if you have never used an AI upscaler before.
Pros: free tier, very simple, instant results. Cons: free output is capped in resolution and quality, and heavy use pushes you toward a paid plan. Upscale.media
4. Adobe Super Resolution — best if you already use Lightroom
Adobe builds Super Resolution into Camera Raw and Lightroom, roughly doubling an image's linear resolution with one click. If you already pay for Adobe, it is a capable, well-integrated option that fits neatly into an existing editing workflow.
Pros: built into tools you may already own, non-destructive, great for raw photos. Cons: requires an Adobe subscription, and the maximum enlargement is more modest than a dedicated upscaler. Adobe
5. Photo apps like Remini — best for old or low-res snapshots
Gigapixel- and Remini-style mobile apps focus on restoring and enlarging personal photos — old family pictures, blurry snapshots, and faces in particular. They are tuned for people and portraits rather than graphics or product shots.
Pros: excellent on faces, easy phone workflow, good for restoration. Cons: can over-smooth or alter features, subscription-based, and less suited to logos, text, or screenshots.
How to choose the right upscaler
Start with what you are upscaling. For photographs with real texture, almost any tool here does well — pick on price and convenience. For the highest quality and large enlargements, Topaz Gigapixel AI is worth the cost. If you want to stay free and in the browser, try Upscale.media first, then Let's Enhance if you need batches.
Three things matter most: how big an enlargement you need, whether you are comfortable uploading images to a web service or prefer a local desktop app for privacy, and your budget. Be realistic — upscaling text, logos, and screenshots is the hardest case for AI, and results there are often disappointing no matter which tool you use.
Where PNGifier fits in
To be clear: PNGifier does not do AI upscaling. Our resize tool does ordinary, non-AI resizing — which is exactly what you want for making an image smaller or for modest size changes where no new detail is needed. It is fast, free, and runs without uploading your file anywhere.
AI upscaling is a different, specialised job: inventing detail to enlarge a small image convincingly. For that, reach for one of the dedicated tools above. For everyday format and size work, browse the rest of our tools.
Frequently asked questions
- What is the best AI image upscaler overall?
- For pure output quality, Topaz Gigapixel AI is hard to beat — it is a paid desktop app built specifically for upscaling. If you want something free and in-browser, Upscale.media is a good starting point, and Let's Enhance sits in between for web-based batch work.
- Is there a free AI image upscaler?
- Yes. Upscale.media offers free upscales with limits, and most paid tools like Let's Enhance and Topaz offer trials or free credits. Free tiers usually cap resolution, add a watermark, or limit how many images you can process per day.
- Can PNGifier upscale my image with AI?
- No. PNGifier's resize tool does ordinary, non-AI resizing — perfect for making an image smaller or for modest size changes. It cannot invent new detail, so for large enlargements you'll want a dedicated AI upscaler from this roundup.
- Will AI upscaling always look good?
- Not always. AI upscalers guess at detail that isn't in the original, so results can look smeared or over-sharpened on tricky images like text, logos, or low-quality sources. They shine most on photographs with real texture to reconstruct.