Blur Image Fixer

Guide: what Blur Image Fixer can and cannot recover

What happens to your photo

The fixer works in two stages. First it runs a small super-resolution neural network (ESRGAN-slim, loaded through TensorFlow.js) that enlarges your image to twice its width and height. While enlarging, the network predicts edges and textures, which tends to make soft outlines cleaner. Second, the enlarged result is scaled back down to your original pixel size and two passes of unsharp-mask sharpening are applied, one fine and one slightly wider.

The output therefore has exactly the same dimensions as your upload and is saved as a PNG. The first time you use it, the browser downloads the model files (about 5 MB) and caches them, so later runs start faster. Your photo itself is processed locally and is not uploaded.

Types of blur it helps with

Not every blurry photo is blurry for the same reason, and the reason decides how much this tool can help.

• Mild softness from a cheap lens, a dirty phone camera or slight focus miss: usually a clear improvement.
• Low resolution or heavy compression, such as an image saved from WhatsApp or a social site: edges become cleaner, though compression blocks can also get sharpened.
• Strong motion blur, where everything is smeared in one direction: limited help. The tool does not reverse motion; it only sharpens what is there.
• Badly out-of-focus shots, where a face is just a soft blob: detail that was never captured cannot be brought back. Expect a crisper blob, not a recognisable face.

Side effects to watch for

Sharpening increases contrast along edges. On already-sharp photos this can create thin light or dark outlines (halos) and make noise more visible. On grainy low-light photos, the grain itself is sharpened. Always compare the before and after views at full size, especially on faces and text. If the result looks harsh, the original may simply not have needed fixing, or a gentler approach such as the AI Image Upscaler may suit it better.

Because the result is a PNG, the file is often larger than your original JPG. If you need a smaller file for a form or website, convert it with PNG to JPG or use Compress to Size.

Tips for the best result

• Start from the largest, least-compressed version of the photo you have. A file forwarded several times on chat apps has lost detail at each step.
• Crop to the area you care about first with the Crop tool. Smaller images process faster and the subject gets the full benefit.
• Run the fixer once. Running the output through it again mostly adds halos and noise, not detail.
• If you also need the image larger, use the upscaler instead of this tool, since this one keeps the original size.
• Very large photos take longer because the network processes the image in small patches. On an older phone, close other tabs before you start.

Why the output keeps your original size

It may seem odd to enlarge an image and then shrink it back. The reason is that the neural network does its best work while it is adding pixels: it redraws edges as clean lines instead of soft gradients. When that cleaner, larger version is scaled down again, the clean edges are packed into fewer pixels, which reads as extra crispness at the original size. The final sharpening then adds a little more edge contrast on top.

Keeping the original size is useful when the image has to fit somewhere fixed, such as a website slot, a document or a form that rejects larger dimensions. It also means you can swap the fixed file in place of the old one without changing any layout. If you actually want a bigger image, the upscaler is the right tool.

Before you start

• Your file is PNG, JPG or WEBP (convert HEIC with HEIC to JPG).
• You have a stable connection for the first run, when the model downloads.
• You know the cause of the blur, so your expectations match what sharpening can do.
• You have kept a copy of the original in case you prefer it.

Related guides

• How to Fix a Blurry Photo: Sharpening Methods That Work
• How to Make a Low-Quality Image HD Online
• How to Fix a Grainy Photo Online and Reduce Noise