How to Remove Noise From a Photo
Noise is the speckled, grainy texture that appears when a camera is pushed — low light, a high ISO setting, or a small phone sensor doing its best. The naive fix is to blur the image, which does remove the grain and also removes everything else, leaving that waxy, plastic look everyone recognises. This tool uses an edge-preserving bilateral filter instead, which smooths flat areas while leaving real edges intact.
Upload your photo
Night shots, indoor photos and anything taken at high ISO benefit most. It stays on your device.
Pick a preset or tune it
Start with Standard, or Portrait if there is skin in the frame, then adjust strength and detail protection.
Zoom in and judge it
Click the result to zoom. Denoising must be judged up close - at fit-to-screen size everything looks fine.
Why Denoised Photos Usually Look Plastic
The problem is that a blur cannot tell the difference between random noise and real fine detail — both are small, rapid variations in brightness. Blur them together and you lose skin texture, fabric weave, individual hairs and foliage along with the grain. That loss is what reads as artificial.
A bilateral filter solves this by weighting each neighbouring pixel twice: once by distance, and once by how similar its value is. Pixels across an edge are very different, so they contribute almost nothing to the average and the edge survives intact. Pixels within a flat area are similar, so they average together and the noise disappears. That second weighting is the whole trick, and it is what the detail protectionslider controls — higher values narrow the range of what counts as similar, protecting more detail at the cost of removing less noise.
There is one more distinction worth knowing. Noise comes in two kinds: luminance noise, which is a fine brightness grain that many people find rather pleasant and film-like, and chroma noise, which is blotchy red and green speckling that always looks like a fault. This tool cleans chroma noise much harder than luminance noise by default, because that is where the ugliness lives. The Colour only mode goes further: it removes the speckle entirely and leaves the grain untouched, which is what most photographers actually want.
Getting a Result That Still Looks Like a Photograph
Always zoom in to judge it
At fit-to-screen size even a badly over-smoothed image looks fine, because the screen is throwing away detail anyway. Zoom to full size before deciding.
Under-do it rather than over-do it
A little remaining grain reads as a photograph. No grain at all reads as a render. If you are unsure, back the strength off by ten.
Portraits need the highest detail protection
Skin is the first thing to go plastic. The Portrait preset uses gentler settings and less sharpening for exactly this reason.
Denoise before sharpening, not after
Sharpening amplifies whatever is there, including noise. Clean first, then add bite - which is why the sharpen step here runs last, on the cleaned image.
Frequently Asked Questions
How do I remove noise from a photo for free?
Upload it, pick a preset or adjust the sliders, and download. Free, no signup, no watermark and full resolution output.
Why do denoised photos usually look plastic?
Because a plain blur cannot distinguish noise from fine detail and removes both. This tool uses an edge-preserving filter, which smooths flat areas while leaving real edges intact.
What is the difference between luminance and colour noise?
Luminance noise is a fine brightness grain that often looks film-like. Colour noise is blotchy red and green speckling that always looks like a fault, so it is removed more aggressively.
What does detail protection do?
It controls how different two pixels must be before the filter treats them as separate. Higher values protect more edges and texture but remove less noise.
What settings should I use for portraits?
Use the Portrait preset. Skin is the first thing to look plastic, so it uses higher detail protection and much lighter sharpening.
Should I denoise before or after sharpening?
Always denoise first. Sharpening amplifies whatever is present, so sharpening a noisy image makes the noise dramatically worse.
Is my photo uploaded to a server?
No. The entire filter runs on a canvas inside your browser. Your photo is never uploaded, stored or seen by anyone.
Why is it slower than other tools?
The filter compares every pixel against its neighbours and weights each comparison. That work is exactly what preserves edges, and it cannot be shortcut.
Can it fix a very noisy night photo?
It will improve one substantially, but heavy noise means real detail was never captured. Expect a cleaner image, not a recovered one.
What is Colour only mode for?
It removes the blotchy colour speckling but leaves luminance grain untouched. Many photographers prefer this because the remaining grain reads as film rather than fault.
Does it work at full resolution?
Yes. Every original pixel is processed - the preview is only scaled to fit your screen.
Is this denoise tool really free?
Completely free, with no limits, no watermark, no signup and no premium wall. Everything runs in your browser.
Last updated: July 21, 2026 · FlipMyFormat Image Denoiser
Written and maintained by the FlipMyFormat team