100% · Original opacity
Preserves the original opacity. Transparent areas in an existing PNG remain transparent.
IMAGE OPACITY
Image Opacity Changer
Adjust the opacity of photos and logos, then save a full-resolution PNG. The same opacity is applied to the whole image.
01
Choose an image to adjust
Your original file stays unchanged. The result is saved as a new image.
Selected images are not uploaded to a server.
02
Adjust opacity with a live preview
Lower values make the image more transparent.
%
0% fully transparent100% original opacity
Transparent areas in the original are preserved.
Original resolution · PNGThe checkerboard and preview background are not saved.
IMAGE TRANSPARENCY GUIDE
Change photo and PNG opacity for free
Make a logo, presentation photo or background graphic more subtle. Adjust the image in your browser and download a PNG without installing software or creating an account.
How to change image opacity
- Choose an image, drag it onto the upload area, or try the sample.
- Set opacity between 0 and 100% with the slider or number field.
- Compare the original and result on checkerboard, white or black backgrounds.
- Download the transparent PNG at the original resolution.
Supported formats and limits
- Input: PNG, JPG/JPEG, WebP, GIF and BMP
- Output: PNG with alpha transparency
- Up to 30 MB, 10,000 pixels on each side and 40 megapixels in total
- GIF exports one still frame, not the full animation
What do opacity percentages mean?
50% · Semi-transparent
The image becomes more subtle. Every original pixel is drawn at half of its original opacity.
0% · Fully transparent
All pixels become transparent and the saved image is invisible. Its width and height stay the same.
Frequently asked questions
Does this change the entire image?
Yes. The same opacity is applied to the background and subject. It does not select and erase a specific background or color.
Can I adjust an already transparent PNG?
Yes. Existing transparency is preserved and multiplied by the chosen opacity. A pixel originally at 50% opacity becomes approximately 25% when another 50% is applied.
Why is the result saved as PNG?
PNG supports semi-transparent pixels and fully transparent areas. You can also adjust a JPG image and save the result as PNG.
Is the checkerboard or white background saved?
No. Those backgrounds only help you inspect transparency. The downloaded PNG contains the image and its adjusted opacity.
Are my images uploaded or stored?
No. Image loading, previewing and PNG export happen in your current browser. Selected files are not sent to the Congdy Coding server.
Does the image resolution change?
The exported PNG keeps the original pixel dimensions. The on-screen preview may be scaled down, and the output file size can differ from the original.
Last updated: October 12, 2026