Opaque Pixel Counter
Audit an image to isolate and count the non-transparent pixels. Runs entirely in your browser, so your data never leaves your device.
Drop a file here, or click to browse
Files never leave your device
Output
The result appears here as you type.
How to use Opaque Pixel Counter
- 1. Upload the PNG. Add the image you want audited. The tool reads its alpha channel to determine which pixels count as fully opaque.
- 2. Read the opaque pixel count. The result reports how many pixels have an alpha value of 255 out of the image's total pixel count, such as 587,500 of 1,000,000 pixels are fully opaque.
- 3. Copy the count for your records. Copy the reported number to use in a report, a coverage calculation or a comparison against another version of the same image.
When to use Opaque Pixel Counter
Opaque Pixel Counter audits a PNG to isolate and count exactly how many pixels are fully non-transparent, giving a precise measure of how much of the canvas actually holds visible content.
- Measuring a cutout's coverage. A background-removal script produces a logo.png with transparency, and a QA check needs the opaque pixel count to confirm the subject still occupies a reasonable share of the frame.
- Validating an automated masking pipeline. An image-processing pipeline generates masks in bulk, and comparing the opaque pixel count across runs flags cases where a mask came out mostly empty or mostly filled.
- Estimating ink coverage for a sticker order. A print vendor charges partly based on printed area. Counting opaque pixels in a design gives a rough estimate of coverage before submitting the file for a quote.
Examples
Count fully opaque pixels
Input
logo.png
Output
587,500 of 1,000,000 pixels are fully opaque
About the Opaque Pixel Counter tool
Opaque Pixel Counter does its work locally, right in the browser. Audit an image to isolate and count the non-transparent pixels. There is no upload step, no queue and no account, and your data never travels over the network.
It belongs to the PNG Tools collection on EditSafely, a set of 108 small, focused PNG utilities that share the same instant, private workspace.
There is nothing to configure. Provide the input and the result appears on its own. A worked example further down the page shows exactly what the tool produces for a real input.
Running locally also makes the tool fast and dependable: results appear as you type or drop a file, there is no server outage that can take it down mid-task, and confidential data can be processed without a second thought.
Frequently asked questions
Does Opaque Pixel Counter cost anything?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Are my files uploaded to a server?
No data leaves your device. The whole tool is JavaScript that runs inside your browser tab, so there is no upload, no server-side processing and no log of what you did. If you disconnect from the internet after the page loads, it keeps working.
Which files does Opaque Pixel Counter accept?
It accepts PNG images. There is no file size cap imposed by a server; very large files are limited only by your device's memory.
Do I need to sign up or install anything?
Nothing to install and no account needed. Open the page in any up-to-date browser, including on a phone or tablet, and the tool is ready.
How do I use the result?
The output panel has a one-click copy button, and you can keep refining the input while you work; the result updates in place as you type.