Unblur an Image Online — Free, No Signup
Unblur an image in your browser with three sharpening modes and a strength slider you control. Drop the photo, pick a mode, raise the strength until edges look crisp, download. Nothing is uploaded and there is no signup or watermark. One honest caveat up front: this recovers a photo that is slightly soft. A badly out-of-focus or motion-smeared shot cannot be reconstructed by this tool or any other, whatever the ad copy elsewhere says.
How to do it
- Drop the blurry photo onto the upload box, or click it and pick a file (JPG, PNG or WebP up to 5 MB).
- Choose a mode. Unsharp is the safe default for a slightly soft photo. Detail brings out fine texture at a fixed setting. Strong is for a noticeably soft image and is the most likely to produce halos and noise.
- Raise the strength slider until edges tighten. Stop the moment you see a bright rim along dark edges — that halo is the sign you have gone too far.
- Download the sharpened copy. Your original is untouched.
What unblurring can and cannot do
Blur is missing information. A lens that was slightly out of focus, or a hand that moved during a slow shutter, spread each point of light over its neighbours, and the camera recorded the spread rather than the point. Sharpening works by finding the edges that survived and exaggerating the brightness change across them, which your eye reads as focus. When the edge is faint but present, that is enough to make a photo look properly sharp again. When the edge was smeared across twenty pixels, there is no local contrast left to amplify and no algorithm can invent it honestly. That is why this tool is good at a phone photo that missed focus by a fraction, a scan that came out soft, or a downscaled image that lost its bite, and useless on a photo taken through a rain-covered window. If you can make out the subject but it looks slightly hazy, you are in the range where it helps.
The three modes
Unsharp is classic unsharp masking: the image is blurred with a radius of about two pixels, the blurred copy is subtracted from the original to isolate edges, and that edge map is added back scaled by the strength slider. It is the method used in every photo editor and the one to reach for first. Detail is an edge-preserving detail enhancer: it separates the image into a smooth base and a fine-texture layer, then boosts the texture layer while leaving large edges alone, which lifts fabric weave, hair, foliage and printed text without halos. It uses a fixed setting, so the strength slider does not change it — it is a one-click option for a photo that looks flat rather than blurry. Strong is a Laplacian sharpen: it emphasises the second derivative of brightness, which produces the crispest edges and the biggest change, and also amplifies noise the most. Keep the strength lower than you would in Unsharp and compare against the original before downloading.
Reading the strength slider
The strength slider controls how much of the edge map gets added back. At low values the change is subtle and the photo simply looks better focused. Around the middle, sharpening becomes obvious at 100% zoom but still reads as natural at normal viewing size. Push further and three artefacts appear in order: a light halo along dark edges, a dark halo along light edges, and amplified noise in smooth areas like sky or skin. Noise is the one people miss. Sharpening cannot tell the difference between a real edge and sensor grain, so a photo shot in low light gets grittier at the same strength that makes a daylight shot look great. For noisy photos, use Unsharp at a low setting, or try Detail, and accept a smaller improvement.
Motion blur versus focus blur
The two blurs look different and respond differently. Focus blur is symmetric: every point spreads evenly in all directions, and light sharpening recovers a good deal of it because the edges are soft but still in place. Motion blur is directional: every point is dragged along the path the camera or subject moved, and edges perpendicular to that path get smeared into streaks. A generic sharpener can tighten the edges that were parallel to the motion, but the streaked ones stay streaked. If a photo has doubled edges, ghosted text or a light trail, that is motion blur, and the realistic goal is making it a little more legible rather than making it sharp.
Order of operations with other fixes
Sharpen last. If you are also going to resize, compress or enhance the photo, do those first, because each of them changes edge contrast and can either undo sharpening or double it into halos. The one exception is noise: if the photo is grainy, reducing noise before sharpening avoids amplifying it, though this tool does not denoise, so the practical version is simply to sharpen less. When a photo is soft because it was scaled up, sharpening helps more than you would expect, because upscaling produces exactly the kind of low-contrast edges unsharp masking is designed to lift. When it is soft because it was heavily JPEG-compressed, sharpening emphasises the block boundaries as well as the real edges, so keep the strength low.
Privacy and limits
The whole pipeline runs in your browser. The photo is decoded locally, sharpened by JavaScript on your own device, and offered back as a download; nothing is sent to a server, which matters for a photo of a document, a screen or a person you would rather not upload anywhere. Input is JPG, PNG or WebP up to 5 MB, and the output keeps the original pixel dimensions. Larger phone photos can be resized first with the image resizer, and a photo that needs both fixing and shrinking should be resized before it is sharpened. There is no watermark, no daily cap and no queue.
Frequently asked questions
Can this unblur a badly blurred photo?
No. It recovers a photo that is slightly soft — missed focus by a fraction, a soft scan, an upscaled image. Heavy blur is missing information, and no browser tool or app can honestly reconstruct it.
Which mode should I start with?
Unsharp. It is the standard sharpening method and safe at moderate strength. Try Detail for a photo that looks flat, and Strong only for a visibly soft image.
How do I know when I have sharpened too much?
Look for a bright rim along dark edges, a dark rim along light ones, or grain appearing in smooth areas like sky and skin. Back the strength off until those disappear.
Does it fix motion blur?
Partially. Edges parallel to the motion tighten; edges streaked by the motion stay streaked. Expect more legible, not sharp.
Is the photo uploaded anywhere?
No. Decoding, sharpening and encoding all run inside your browser. The file never leaves your device.
Does the output lose quality?
The output is re-encoded, so a JPEG source is compressed again at high quality. Pixel dimensions are unchanged. Keep the original if you may want to try different settings later.