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Noise Reduction

Smooth out grainy photos and remove digital noise for a crisp, professional finish.

Free · private · in-browser

Denoise in the browser—grain down, detail honest

Blend median smoothing, subtle Gaussian blur, and a light contrast lift to tame sensor grain while you flip between original and edited views.

What causes image noise? High ISO, small sensors, and underexposure amplify random brightness variation—especially in night shots. This tool softens that speckle globally before you crop or share.

How to use Noise Reduction

Load your photo

Upload a file or pick a sample from the sidebar. The image appears in the bordered preview with generous padding.

Set Noise Reduction Level

Once the slider unlocks, drag from 0% upward. Use Show Original while moving to see grain disappear versus detail soften.

Download

When you like the balance, tap Download—the PNG reflects your current level even if you were viewing the original.

Supported file formats

Open these types in the workspace. Download exports PNG at source resolution to match the denoise pipeline.

  • PNG
  • JPEG / JPG
  • WebP

Key features

Median + blur + contrast pipeline, live compare, sidebar samples, private PNG export.

  • 0–100 noise reduction level

    Scales median passes (up to three), Gaussian radius up to 2px, and a capped contrast boost for a balanced look.

  • Show Original / Show Edited

    Instant A/B between untouched pixels and the smoothed preview so you can judge detail loss in real time.

  • Sample thumbnails

    Same sidebar row as Blur: tap a thumbnail to load a demo image onto the canvas immediately.

  • Crisp canvas frame

    Pure white stage, 1px border, and subtle grid cues aligned with Blur, Lighten, and Editor.

  • PNG download

    Export applies the same denoise math as the slider—not just a screen capture—at full resolution.

  • Private processing

    Pixels never leave your device for this workflow until you download or share them yourself.

Common use cases

  • Night & concert photos

    How to fix grainy night photos: raise the slider gradually, compare with Show Original, and stop before faces turn plastic.

  • Phone shots in dim light

    Aggressive noise reduction on small sensors can look painterly—use moderate levels and rely on compare to keep texture.

  • Scans and compressed JPEGs

    Blockiness and chroma speckle often respond well to median passes before sharing or printing small.

  • Quick cleanup before another editor

    Global denoise here, then sharpen or tone locally elsewhere with a cleaner starting point.

Pro tips

  • What causes image noise? Low light forces higher ISO, which amplifies random sensor readout—median filtering targets that speckle pattern.
  • How to fix grainy night photos: increase Noise Reduction Level in steps; if streetlights halo or skin looks waxy, back off and accept a little grain.
  • Heavy denoise kills fine hair and fabric texture—toggle Show Original often on portraits.
  • For very large images, high levels do more math in your browser; if the UI stutters, try a smaller export from your camera app first.

Frequently Asked Questions