What you need
Choose one authorised JPEG, PNG, or WebP image up to 20 MB and 12 million decoded pixels. Animated frames are not processed.
Image Tools / Local studio
Image Film Grain Adder
Add bounded deterministic luminance variation to a still image, preserve dimensions and alpha, and export locally in browser.
Runs locallyNo image upload to Nirmion
Step 1 / Source
Choose one image
Drop your image here
Or browse for a JPEG, PNG, or WebP image that you own or are authorised to edit.
One file · up to 20 MB · maximum 50 megapixelsStep 2 / Output
Image Film Grain Adder controls
Choose 0 for no added grain or up to 100 for stronger tonal variation; the same pixels and setting reproduce the same result. Pixel processing stays in this browser tab.
Create the film-grain imageThe source file is not overwritten. Export creates a separate film-grain image.
Keep this page open until the download begins.01No server upload
The selected image is decoded and re-encoded inside this browser tab.
02Working copy released
After download, the preview URL, decoded bitmap, canvas, and selected source reference are cleared.
03Your download remains
Nirmion cannot remove the finished file from your device or browser download history.
Workflow guide
A controlled image film grain adder workflow
A reproducible coordinate-based noise value is added equally to RGB channels, creating luminance grain without random export drift. Review the result against the intended display rather than treating the setting as an objective correction.Social-ready choices
Add restrained texture to a flat illustration, then review smooth gradients and small text at final display size.
What you receive
Download a separate film-grain image. Dimensions remain unchanged unless the selected encoder handles the source differently.
Decision guide
What image film grain adder changes
A reproducible coordinate-based noise value is added equally to RGB channels, creating luminance grain without random export drift.
Synthetic digital grain does not emulate a named film stock, sensor noise profile, scanner response, or physical print texture. Browser-local processing avoids a Nirmion file upload, but it does not remove copies already stored elsewhere.
W3C Filter Effects Module Level 1Useful image film grain adder checks
- Add restrained texture to a flat illustration, then review smooth gradients and small text at final display size.
- Create a reversible review copy while preserving the original image for comparison or later editing.
- Prepare a consistent derivative for an authorised design, publishing, or archival workflow.
Good to know
Important image boundaries
- Why might a PNG not become smaller?
- PNG is lossless and browsers do not expose a quality control for it. Choose WebP or JPEG when reducing file size matters more than exact lossless pixels.
- Are animated images supported?
- No. The workspace accepts still JPEG, PNG, and WebP files. Re-encoding an animated source would otherwise keep only one frame.
- What does clearing the file mean?
- Because processing is local, there is no Nirmion server copy to delete. The tab releases its working references after success; your downloaded output remains on your device.
Questions answered
Frequently asked questions
Does Image Film Grain Adder upload my image?
No. For supported JPEG, PNG, and WebP inputs, decoding, image film grain adder, canvas rendering, and export run in your current browser tab. Nirmion does not send the selected image to its API for this workflow. The downloaded file is a new derivative; your original device file remains unchanged and should be retained when future editing or verification matters.
What does Image Film Grain Adder change?
A reproducible coordinate-based noise value is added equally to RGB channels, creating luminance grain without random export drift. The operation is applied to decoded RGB pixels while the alpha channel is preserved. It does not resize the canvas, recover clipped source detail, identify subjects, or infer a professionally correct look. Inspect representative shadows, midtones, highlights, edges, text, and transparent areas before relying on the exported copy.
What are the limits of Image Film Grain Adder?
Synthetic digital grain does not emulate a named film stock, sensor noise profile, scanner response, or physical print texture. The workspace accepts one supported still image up to 20 MB and limits pixel-intensive effects to 12 million decoded pixels for predictable browser memory use. Output also depends on the browser encoder and selected format. Animated images, raw camera development, colour-profile calibration, and batch processing are outside this tool's scope.