Image Filters (Grayscale, Sepia, Invert)
Apply grayscale, sepia, invert, brightness or contrast adjustments to an image and download the result. Pixel maths runs entirely in your browser.
Runs on your device
Result
Results appear here after you select “Apply”.
What it does
Quick tonal adjustments without opening an editor. Grayscale uses the ITU-R BT.709 luminance weights so the result keeps perceived brightness.
How to use it
- Choose an image.
- Pick a filter and strength.
- Apply and download.
Example
The example generates a small sample file in your browser and runs the tool on it. Select Try an example above to see it.
When it helps
- Black and white photos for print.
- Inverting scanned diagrams.
- Brightening dark document photos.
Questions
What does strength mean?
For grayscale, sepia and invert it blends between the original (0) and full effect (100). For brightness and contrast, 0 is darkest or flattest, 50 is unchanged and 100 is strongest.
Is transparency kept?
Yes, if you save as PNG or WebP.
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