Guide · updated September 2026
How to denoise photos — grain out, detail in
Five ways to remove noise from a photo — AI, Lightroom Denoise, manual sliders, Photoshop and GIMP — with the exact menus, which files each works on, and how to avoid noise next time.
- Works on JPEGs
- Exact menu paths
- Raw and phone photos
- Prevention tips
Updated by the Kenerate AI team
On this page
Quick answer
How do you denoise a photo?
To denoise a photo, use an AI enhancer such as Kenerate AI's Phota Enhance, which removes grain from JPEGs and phone photos in about 40 seconds. For raw files, use Lightroom or Camera Raw Denoise. In Photoshop, use Filter → Noise → Reduce Noise, and in GIMP, use Filters → Enhance → Noise Reduction.
Key facts
- Any file, fastest
- AI enhancer (Phota Enhance)
- Raw files
- Lightroom / Camera Raw Denoise
- Photoshop
- Filter → Noise → Reduce Noise
- Free
- GIMP Noise Reduction
Method 1 · any file
How to denoise a photo with AI
The only method here that works on JPEGs and phone photos and rebuilds detail at the same time.
Step 1: Open the enhancer
Go to kenerateai.com/app/tool/image-upscale — this guide opens it on Phota Enhance.
Step 2: Upload the grainy photo
Any JPG, PNG or WEBP up to 25 MB — phone shots included, no raw file needed.
Step 3: Run Phota Enhance
About 40 seconds; noise is removed while texture and faces are rebuilt, at 2048 px.
EnginePhota Enhance
Step 4: Compare and download
Check shadows and skin at 100%, then download with no watermark.
At 100%
Grain vs detail, zoomed in
The same crop before and after AI denoising.
Method 2 · raw files
How to use Denoise in Lightroom and Camera Raw
Adobe's AI Denoise (April 2023) — raw files only.
Step 1: Open a raw photo
Denoise works on raw files (Bayer and X-Trans), Linear DNG and Apple ProRAW — not on JPEG, TIFF or HEIC.
Step 2: Run Denoise
In the Detail panel choose Denoise (or Photo → Enhance in Camera Raw and Lightroom), set the amount and apply.
DetailDenoise
Step 3: Continue editing
Depending on the version, the result is saved as a new DNG (with “Enhance-NR” in the name) or applied in place. Adobe recommends running Denoise before AI masks or Remove.
Method 3 · any Lightroom file
Manual noise reduction sliders
Works on JPEGs too, but trades some detail.
Step 1: Open the Detail panel
Lightroom Classic: Develop → Detail → Noise Reduction. Camera Raw: Detail panel.
DevelopDetailNoise Reduction
Step 2: Reduce luminance noise
Raise Luminance until the grain smooths out, then use Luminance Detail and Contrast to win back texture.
Step 3: Reduce colour noise
Raise Color to remove coloured speckles; Color Detail keeps small colour edges crisp.
Method 4
How to reduce noise in Photoshop
Step 1: Open Reduce Noise
Filter → Noise → Reduce Noise.
FilterNoiseReduce Noise
Step 2: Set the sliders
Strength for luminance noise, Preserve Details to keep edges, Reduce Color Noise for colour speckles, Sharpen Details to recover crispness, and Remove JPEG Artifacts for compressed files.
Step 3: Use Advanced for one channel
Adobe notes luminance noise is often worst in the blue channel — the Advanced tab lets you treat channels separately.
Method 5 · free
How to denoise in GIMP
Step 1: Noise Reduction
Filters → Enhance → Noise Reduction — one Strength slider that trades noise for blur.
FiltersEnhanceNoise Reduction
Step 2: Selective Gaussian Blur
Filters → Blur → Selective Gaussian Blur — blurs only where neighbouring pixels differ less than Max. delta, so edges survive.
FiltersBlurSelective Gaussian Blur
Step 3: Despeckle
Filters → Enhance → Despeckle — best for isolated specks and dust on scans.
Checked 26 September 2026
Which method should I use to fix a grainy photo?
The five methods side by side.
| AI (Phota Enhance) | Lightroom Denoise | Manual sliders | Photoshop Reduce Noise | GIMP | |
|---|---|---|---|---|---|
| JPEG / phone photos | Yes | No | Yes | Yes | Yes |
| Keeps detail | Rebuilds it | Very well | Trade-off | Trade-off | Trade-off |
| Effort | One click | One click | Slider tuning | Slider tuning | Slider tuning |
| What you need | Browser, free credits to start | Adobe plan | Adobe plan | Adobe plan | Free |
Look closer
Zoom into a denoised photo
A grainy concert shot after Phota Enhance. Move over it to check the singer and the stage lights.
- Grain gone from the dark crowd
- Stage-light colours kept
- Face and hands sharper, not smeared
Next time
How to avoid noise when you shoot
Step 1: Keep ISO as low as the light allows
Canon explains that raising ISO amplifies the sensor signal, and noise is generated in the process.
Step 2: Use long-exposure noise reduction
Canon, Nikon and Sony cameras offer Long Exposure NR for exposures of 1 second or longer; it can roughly double the capture time.
Step 3: Let the phone help
iPhone Night mode (iPhone 11 and later) and Pixel Night Sight turn on automatically in low light — hold still for the capture.
How it works
How it works in the app
Step 1
Add the image to upscale
Open Image Upscaler and upload a photo, or pick one from your library or a link.
Step 2
Pick an upscaler and mode
Choose one of the upscalers, then Precise for a faithful copy, Creative for extra detail or Restore for old photos.
Step 3
Click Upscale
Press Upscale to create a sharper, larger copy of your image.
Step 4
Compare and download
Slide between the original and the upscaled result, then download the full-resolution file.
See it in the app
Open Image Upscaler and upload a photo, or pick one from your library or a link.
FAQ
Denoising photos — FAQ
7 questions
How do I denoise a photo?
The quickest way is an AI enhancer: upload the photo to Kenerate and run Phota Enhance, which works on JPEGs and phone photos. In Lightroom or Camera Raw use Denoise on raw files, or the Luminance and Color sliders in the Detail panel; in Photoshop use Filter → Noise → Reduce Noise; in GIMP use Filters → Enhance → Noise Reduction.
Link to this answerHow do you fix grainy photos?
Grain is noise, so fixing a grainy photo means denoising it. For a JPEG or phone photo, run it through an AI enhancer such as Kenerate's Phota Enhance, which removes grain and rebuilds texture in about 40 seconds. For raw files, use Lightroom or Camera Raw Denoise. To avoid grain next time, shoot at the lowest ISO the light allows and expose properly.
Link to this answerCan Lightroom Denoise work on JPEG?
No. Adobe's AI Denoise works on raw files, Linear DNG and Apple ProRAW; Adobe lists JPEG, TIFF and HEIC as unsupported. For JPEGs use the manual sliders, Photoshop's Reduce Noise, or an AI enhancer that accepts JPEGs.
Link to this answerWhat is the difference between luminance and colour noise?
Adobe describes luminance noise as grayscale grain that makes an image look grainy or patchy, and colour noise as coloured artefacts. Most tools have separate controls for each.
Link to this answerWhat causes noise in photos?
Adobe lists high ISO, underexposure and long shutter speeds in dark areas. Light itself is noisy at low levels, and the camera amplifies it.
Link to this answerDoes denoising make photos blurry?
Classic noise reduction trades noise for detail — GIMP's Noise Reduction strength literally balances the two. AI denoisers rebuild texture instead of just smoothing, which is why they keep more detail.
Link to this answerHow do I avoid noise when shooting?
Use the lowest ISO the light allows, expose properly (underexposed shots get noisier when brightened), use Long Exposure NR for long shots, and on phones let Night mode or Night Sight do the capture.
Link to this answerIn depth
What photo noise is — and why AI handles it better
Where grain comes from, the two kinds of noise, and how denoisers differ — with sources.
On this page
Where noise comes from
Adobe's Denoise team explains that light itself is noisy — the number of photons reaching each pixel varies — and the sensor's readout adds more, mostly in the shadows [1]. Adobe's Photoshop guide lists the usual triggers: high ISO, underexposure and long shutter speeds in dark areas [2]. Canon adds that raising ISO amplifies the sensor signal, generating noise in the process [3].
Two kinds of noise
Luminance noise is grayscale grain that makes an image look grainy or patchy; colour noise shows up as coloured artefacts [2]. That's why every tool — Lightroom, Photoshop, GIMP — has separate luminance and colour controls, and why colour noise is usually removed more aggressively.
Why AI denoising keeps more detail
Classic filters smooth pixels, so they trade noise for detail — GIMP's Noise Reduction has a single strength slider for exactly that balance [4]. Adobe's AI Denoise, launched in April 2023, was trained to separate noise from detail on raw sensor data [1]; general AI restorers like Phota Enhance do the same kind of job on finished JPEGs by rebuilding texture rather than just blurring it.
By the Kenerate AI teamLast updated and reviewed
Written by the Kenerate team from Adobe, GIMP, Canon, Nikon, Sony, Apple and Google documentation. Examples are real Kenerate outputs.
Sources: Adobe — Enhance (Denoise) in Camera Raw · Adobe — Reduce noise in Photoshop · GIMP 3.0 — Noise Reduction · Apple — Night mode on iPhone · Google — Night Sight on Pixel
Denoise your photo
Phota Enhance — works on JPEGs and phone photos, 2048 px output, no watermark.
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