Image Noise Reducer
Smooth grain and speckle with an edge-preserving blur. Strength sets the radius; detail preservation keeps the edges.
No watermarkFree & unlimited
All processing happens in your browser. No data is sent to any server.
About this tool
- 1
Upload a noisy photo
Select a photo with visible grain, speckle, or high-ISO noise.
- 2
Pick a preset or set it by hand
High ISO, Low light, and Film scan set a starting strength and detail level; Custom gives you both sliders.
- 3
Check the before/after
Drag the comparison slider and zoom to 100% to see how much texture survived.
- 4
Download the result
Save the smoothed image as a PNG at full resolution.
- Strength is a blur radius in pixels. Detail preservation decides how much of the original is blended back where local contrast is high.
- Use the lowest strength that kills the speckle - a large radius turns skin, hair, and fabric into plastic.
- Raise detail preservation if edges start to smear; lower it if grain is still visible in flat areas.
- Denoise before sharpening. Sharpening first amplifies the noise you are about to remove.
- Edge-preserving smoothing filter
- Strength and detail-preservation sliders
- High ISO / low light / film scan presets
- Before-after comparison slider with zoom
- Runs entirely in your browser
- Clean up low-light and night photos shot at high ISO.
- Soften film grain and scanner speckle on scanned prints.
- Tidy webcam stills and video-call screenshots.
- Make a noisy security-camera frame easier to read.
It runs a separable box blur (one horizontal pass, one vertical pass) and then blends the original pixels back in wherever local contrast is high, controlled by the detail-preservation slider. That is a classical edge-preserving smoothing filter written in JavaScript - there is no neural network involved and no AI model is downloaded.
Yes, some. A smoothing filter cannot tell grain from texture, it can only tell flat from edgy. Detail preservation protects strong edges; fine low-contrast texture is always the first thing to go.
It averages all three colour channels the same way, so coloured speckle is reduced along with luminance grain. It does not treat chroma separately the way a dedicated raw converter would.
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