Can I adjust brightness by a specific numeric value rather than a percentage?

The tool uses a percentage slider from 0% to 200% to control brightness; exact numeric values are not supported, but the slider provides fine-grained control over the luminance shift.

Will adjusting brightness affect the PNG's transparency or metadata?

The adjustment modifies pixel luminance uniformly and is designed to retain the original structure and detail; transparency and metadata are typically preserved unless the output format changes.

Is there a file size limit for PNGs uploaded to the brightness changer?

The tool is described as quick and lightweight, but specific file size limits are not listed in the available material; very large files may take longer to process depending on browser performance.

Can I compare the original and brightened PNG side by side before downloading?

Yes, the interface displays the original PNG in the editor on the left and the adjusted version instantly on the right, allowing real-time comparison before downloading the result.

Image ToolsFree Tool

Change PNG Brightness

Provided byOnline PNG Toolsonlinepngtools.com

Brightens or darkens a PNG by adjusting pixel luminance.

Use This Tool

browser-based image png

Screenshot of Change PNG Brightness on Online PNG Tools — onlinepngtools.comOpen the live tool →

About this tool

What Change PNG Brightness does

Online PNG Tools' Brightness Changer lets users adjust the luminance of a PNG image by a percentage from 0% to 200%. Upload a PNG and the tool instantly produces a brighter or darker version on the right side of the screen, preserving the image's original structure and detail. The adjustment applies uniformly across the entire file, making it suitable for correcting exposure or enhancing visual impact without altering the file's core composition.

Step by step

How to use the Online PNG Tools Change PNG Brightness

1
Click 'Click to load an image' or drag and drop a PNG file into the editor on the left
2
Adjust the brightness level slider from 0% (very dark) to 200% (ultra-bright)
3
View the modified PNG preview instantly on the right side of the interface
4
Download the adjusted PNG file to your device once satisfied with the result

Is it right for you

Best for

Web designers, photographers, and digital artists who need quick, uniform brightness corrections for PNG images without complex software or installation.

Limitations

Only accepts PNG files; other formats must be converted first
Adjustment applies uniformly across the entire image with no selective editing
No advanced tonal controls such as highlights, shadows, or midtone adjustments

Questions

Change PNG Brightness FAQ

Can I adjust brightness by a specific numeric value rather than a percentage?: The tool uses a percentage slider from 0% to 200% to control brightness; exact numeric values are not supported, but the slider provides fine-grained control over the luminance shift.
Will adjusting brightness affect the PNG's transparency or metadata?: The adjustment modifies pixel luminance uniformly and is designed to retain the original structure and detail; transparency and metadata are typically preserved unless the output format changes.
Is there a file size limit for PNGs uploaded to the brightness changer?: The tool is described as quick and lightweight, but specific file size limits are not listed in the available material; very large files may take longer to process depending on browser performance.
Can I compare the original and brightened PNG side by side before downloading?: Yes, the interface displays the original PNG in the editor on the left and the adjusted version instantly on the right, allowing real-time comparison before downloading the result.

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