Calculator
What the Image Denoiser does
Image Denoiser: a 3x3 median filter: it removes speckle and salt-and-pepper noise while keeping edges, which a blur would smear. Everything runs in your browser and the file is never uploaded.
Pick a file and the Image Denoiser calculates it right here in the page. The work happens inside your browser tab, so there is no upload to wait for and no queue.
Most people who open the Image Denoiser are writers preparing assets for a post. Getting the dimensions right before upload avoids a lot of downstream cropping.
There is no back end here. The calculation runs where you are sitting, not on a server somewhere.
The sections after the tool cover usage, the method, and the questions this image tool gets asked most.
What do the Image Denoiser fields mean?
The Image Denoiser uses 1 input. A filled form means you can test one idea immediately instead of sourcing every input first.
| Field | What to enter | Default |
|---|---|---|
| Image file | stays on your device | none |
How does the Image Denoiser work?
The calculation is produced in one pass over your input.
Inputs are validated before anything is computed, so a bad entry is reported rather than quietly producing a wrong answer.
What a typical run looks like
You provide: Image file
What happens: the file is read into memory by your browser, processed locally, and offered back as a download. It is never uploaded.
You get back: a new file plus a brief account of what happened to it, shown in the panel.
How long this takes is a property of your computer, not of our infrastructure, and file size is bounded by browser memory.
How to use it
- Choose your file under Image file, or drag it onto the drop area.
- Press Reduce noise.
- Check Status on the right.
- Copy Link when you want to return to this exact configuration; Print when someone needs it on paper.
What this tool does not do
- Re-encoding a lossy format such as JPEG always loses some detail, even at maximum quality.
- EXIF metadata may be dropped during processing, which is usually desirable but is worth knowing.
- Edge cases at the very limits of the accepted range are handled, but rarely worth relying on.
- Large files are limited by your available memory, not by an upload quota.
Frequently asked questions
One thing: Image file. Every box already holds a working value, so nothing is mandatory before you see a result.
No. The file is read by your browser and processed inside the page. It is never sent to us, which is also why it keeps working offline once loaded.
No charge. Everything on the page is available without signing in.
It is exact within the stated method. Anything the method does not model is simply out of scope.