Uwarp
Input image
Image with noise

Upload an image and adjust noise options below—the preview appears here.

Noise options

Amount controls how many pixels receive noise; strength sets how far each affected pixel shifts. Monochromatic applies the same random offset to R, G, and B for grayscale grain.

Amount of noise
Strength of the noise

Use one random value per pixel for film-style grain instead of color speckle.

Add noise to image online

Add noise to images online. Control amount and strength, optional monochromatic grain—turn clean photos into grainy or noisy images, preview, download PNG in your browser.

What is image noise?

Add noise to an image by applying random offsets to pixel color values—whether you want a grainy image, a noise image, or a grainy photo effect. Amount sets how many pixels are affected; strength sets how large each offset can be. Monochromatic mode uses one random value per pixel for grayscale grain; color mode randomizes each RGB channel separately. Upload, adjust, preview, and download PNG—all processing runs in your browser.

Common noise search intents

Upload above, then tune amount and strength—these queries map to the same add-noise workflow.

  1. Grainy image: Make a grainy image with amount (coverage) and strength (intensity) sliders—monochromatic mode mimics film-style speckle on flat digital shots.
  2. Noise image: Turn a clean file into a noise image: random offsets on RGB channels, or one shared offset when grayscale grain is enabled.
  3. Grain filter: Apply a grain filter without desktop software—preview side by side, click Add noise again to re-roll the random pattern.
  4. Grainy photo: Add texture to a grainy photo look on portraits or product shots; start around amount 30–50 with monochromatic on for subtle film grain.
  5. Add noise to image: Add noise to image pixels in one upload—amount sets how many pixels shift, strength sets how far each offset goes (0–100).
  6. Noise on image: Put noise on image channels in the browser; PNG download keeps alpha when you upload transparent assets.

Noise controls

Amount, strength, and monochromatic grain for noisy images and photos.

  1. Amount 0 to 100: Control what share of pixels receive random offsets.
  2. Strength 0 to 100: Set how strong each noise offset is on affected pixels.
  3. Monochromatic toggle: Switch between grayscale film grain and color speckle.
  4. Live preview: Preview updates as you adjust sliders.
  5. Re-randomize: Click Add noise again to generate a new random pattern.
  6. PNG download: Save the result as add-noise-image.png.

How to add noise to an image

Steps to create grainy photos and noisy images online.

  1. Upload the image: Drop or click in the input panel (15 MB max).
  2. Set amount and strength: Start around 40–60 for visible grain; lower for subtle texture.
  3. Choose monochromatic: Enable for film grain; disable for RGB color noise.
  4. Download PNG: Re-apply if you want a different random pattern, then save.

Tips for adding noise

Get better grain results on photos and images.

  1. Start with monochromatic: Film-style grain usually looks best with grayscale noise enabled.
  2. Use low amount first: Try amount 20–40 with strength 30–50 for subtle texture.
  3. Re-roll the pattern: Click Add noise again until the speckle layout looks right.
  4. Pair with contrast: Slightly boost contrast after grain for a punchier retro look.
  5. Keep PNG for logos: Alpha is preserved when adding noise to transparent assets.
  6. Avoid heavy noise on text: High strength on small type reduces readability—use light grain only.

When to add image noise

Typical uses for grain and noise effects on photos and graphics.

  1. Film grain look: Soften overly clean digital photos with monochromatic grain.
  2. Grainy photo style: Give flat shots a textured, analog feel before posting.
  3. Retro posters: Add texture to flat vector exports or social graphics.
  4. Mock distressed assets: Preview noisy backgrounds before printing or compositing.
  5. Design experiments: Test grain intensity on UI mockups or photo placeholders.
  6. Glitch-adjacent styles: Combine high amount and strength for heavy speckle effects.

Why use this noise tool

Benefits of browser-based grain and noise filters.

  1. Two clear controls: Separate coverage (amount) from intensity (strength).
  2. Grayscale or color: Monochromatic toggle matches classic film grain workflows.
  3. Private: Images stay on your device—no server upload.
  4. Instant preview: See grain strength before download.
  5. No install: Works in any modern browser with Canvas 2D.
  6. Free: Unlimited previews and downloads.

Technical details

How noise is applied in this tool.

  1. Algorithm: Per pixel: if random < amount/100, add random offset in ±(128 × strength/100)/2 range; clamp to 0–255.
  2. Monochromatic mode: Same offset added to R, G, and B when enabled.
  3. Color mode: Independent random offsets on each RGB channel.
  4. Rendering: Canvas 2D getImageData / putImageData; alpha unchanged.
  5. Input limits: 15 MB; longest edge 8192 px.
  6. Browser support: Chromium, Firefox, Safari with Canvas 2D.

Frequently Asked Questions

Have questions? We have answers.

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