Image Noise Adding Tool

Add various noise effects to images, including Gaussian noise, film grain, salt-and-pepper noise, and more, with adjustable intensity and coverage.

Bug report

Browser execution mode: Your data is processed in your browser and is not uploaded to the server.

Speed and Stability: Processing speed depends on your device and browser. For large batch work, the desktop version may be more stable.

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If the online tool fails to load or run, try the desktop tool.https://tools.yikeaigc.com/

Tool Usage

Return to old version

Upload images first, set noise options, then preview, process, and download.

Supports single and batch images. Only the first 20 files are shown for review; all selected images will be processed in batch.

Selected 0 images

Current modeNot selected

Output formatPNG

Upload Image

Select image files first, then set options. Supports common formats like PNG, JPG, JPEG, WebP, BMP, and GIF.

Click to choose images, or drag them here You can select multiple images at once. Preview shows only the first 20; processing includes all files.

File Review No image selected

Set Noise

Try the default preview first, then adjust strength, coverage, and grain size to match the image style.

Noise Type Gaussian noise is good for natural grain and subtle texture

Noise Strength 24%

Coverage 72%

Grain Size 1 px

Color ratio 35%

Blend mode

Edge Handling

Random seed

Monochrome noise Keep transparent areas Auto-update preview

Process & download

Download the result directly for one image; multiple images are processed together and packed as a ZIP. Batch output filenames use the original names by default.

Output format JPG does not support transparency; transparent areas will be composited with the background color

Output Quality 92%

JPG background color

Batch Results Preview Show first 20 after processing

Live preview

Original

Waiting for imagePlease upload an image or load a sample first.

Result

WaitingSet parameters first, then refresh the preview or process the image.

No image loaded

Instructions

Software Usage Instructions

Upload images: Click the upload area to select images, or drag and drop images into the tool. Common formats such as PNG, JPG, JPEG, WebP, BMP, and GIF are supported. For batch uploads, the interface displays the first 20 images for review, but all images will be processed.
Load example: Click “Load example image” to quickly view the noise effect, ideal for getting familiar with parameter changes first.
Set noise type:
- Gaussian noise: Suitable for natural grain and subtle texture.
- Uniform noise: Generates evenly distributed random pixels.
- Similar pixels: Produces subtle variations near the original image colors.
- Salt-and-pepper noise: Adds black-and-white speckled noise.
- Film grain: Simulates the grainy texture of photos.
- Speckle noise, scanline grain: Suitable for texture enhancement or special visual styles.
Adjust parameters: You can set noise intensity, coverage, grain size, color ratio, blending mode, light/dark areas, and random seed. It is recommended to generate a preview with the default parameters first, then fine-tune based on the image style.
Configure output: Choose PNG, JPG, or WebP format and adjust output quality. JPG does not support transparency, so you can set a background color; PNG is suitable for preserving transparent areas.
Process and download: For a single image, click “Process current preview” and then download it; for multiple images, click “Batch process all,” then click “Download ZIP” after completion to get the results. Output file names use the original file names by default, and numbers are automatically added to distinguish duplicates.

FAQ

A: Noise intensity controls how strongly the noise affects the original pixels; the higher the value, the more noticeable the change. Coverage controls the proportion of pixels that are processed, making it suitable for controlling noise density.

A: Select “Film grain,” set the intensity to 15%-35%, set coverage to 70%-100%, and keep the grain size at 1-2px. If you want to preserve the original image colors, enable monochrome noise or reduce the color ratio.

A: The random seed controls the noise generation result. The same image with the same parameters and seed will produce a consistent noise distribution, making it easy to reproduce the same effect.

A: “Preserve transparent areas” is enabled by default, so no noise will be added to fully transparent pixels. When PNG output is selected, the transparent channel can be preserved; when JPG output is selected, the image will be composited using the configured background color.

A: Batch processing will keep the original file names whenever possible and change the extension according to the output format. If duplicate file names appear in the results, numbers such as (1) and (2) will be added after the file name to avoid overwriting.

A: Noise increases image detail and pixel variation, making it difficult for some formats to merge these details during compression, so the file size may increase. You can lower the output quality, switch to WebP format, or moderately reduce the noise intensity.

A: Large images and extensive batch processing can use a lot of memory. We recommend processing in batches, reducing the grain size and output quality, or scaling down very large images before adding noise.