Calculator
What the Pixelate Image does
Pixelate Image: shrinks the image so each block becomes one pixel, then scales it back up with smoothing off. Everything runs in your browser and the file is never uploaded.
The Pixelate Image works on a file you choose, without sending it anywhere. Everything runs on your own device, which means no waiting and no copy left on a server.
It is mostly used by people preparing images for the web. A smaller file that still looks right is usually only a few settings away.
The work is done by JavaScript already loaded in your browser, so your input never crosses the network.
The meaning of each field, the formula in use, and a worked example that starts from the default inputs are all further down.
What do the Pixelate Image fields mean?
The Pixelate Image uses 4 inputs. The defaults are there to be replaced. They exist so the tool is never showing an empty result.
| Field | What to enter | Default |
|---|---|---|
| Image file | stays on your device | none |
| Block size | measured in px; accepts 2 to 200 | 12 |
| Export as | choose from PNG, JPEG or WebP | PNG |
| Quality % | accepts 10 to 100 | 92 |
How does the Pixelate Image work?
Each output is derived from the inputs above in a single pass; there is no hidden state carried between runs, so the same inputs always give the same calculation.
Nothing is computed until the inputs pass their checks, so you will not get a confident answer built on a typo.
What a typical run looks like
You provide: Image file, Block size, Export as and Quality %
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 processed file plus a short status summary in the tool panel.
The tab does the processing, so speed tracks your hardware and very large files fail on memory rather than on a quota.
How to use it
- Choose your file under Image file, or drag it onto the drop area.
- Set Block size in px (2 to 200).
- Pick a value for Export as: the options are PNG, JPEG or WebP.
- Key in Quality % (10 to 100).
- Press Pixelate.
- You get Status back.
- Both Copy Link and Print capture the current state, so pick whichever suits how you file things.
What this tool does not do
- EXIF metadata may be dropped during processing, which is usually desirable but is worth knowing.
- Re-encoding a lossy format such as JPEG always loses some detail, even at maximum quality.
- It applies one method. If your situation calls for a different convention, the answer will not match.
- It validates ranges, not intent. A value can be accepted and still be the wrong one to use.
- Performance scales with your own hardware, since no server does the work.
Frequently asked questions
Enter Block size in px. Look for the unit beside each label; the result is reported in a stated unit as well.
Block size accepts 2 to 200 px. Out-of-range entries are refused up front, which is safer than silently clamping them.
It is not uploaded. Everything happens on your device, so no copy of your file exists on any server.
It costs nothing, and there is no limit on repeat use.
The output is deterministic. The same inputs always give the same answer, and the method is documented above so you can check it.