Brightness & Contrast Adjuster
Tune brightness, contrast and saturation in your browser.
Brightness & Contrast Adjuster is a browser-based image tool on ImgToolsBase. Tune brightness, contrast and saturation in your browser. To use it, upload or drop your image and view the result directly in your browser — no signup and nothing to install.
How this tool works
What it does
Brightness & Contrast Adjuster adjusts brightness, contrast and saturation.
Range
0–300% each; 100% unchanged.
Output
PNG/JPG/WebP; PNG/WebP can preserve transparency only when source alpha exists and Transparent background is selected.
Privacy & metadata
Everything runs in your browser on a canvas — your image is never uploaded. Browser canvas export strips EXIF, GPS, and most other source metadata.
Brightness & Contrast Adjuster in your browser
Brightness & Contrast Adjuster adjusts brightness, contrast, and saturation on a browser canvas. Everything runs in your browser on a canvas — your image is never uploaded. Each control is validated to a safe 0–300% range so tampered values cannot break the output.
Use it to fix dark or flat photos. PNG and WebP output can preserve transparency when the source has an alpha channel and Background is set to Transparent; JPG output is flattened onto your chosen fill colour (JPG cannot store transparency).
Brightness & Contrast Adjuster shows the exact adjustments applied, the output dimensions, the output format, and the file size. Browser canvas export strips EXIF, GPS, and most other source metadata. Animated GIFs are processed as a single still frame; animation is not preserved.
How to use Brightness & Contrast Adjuster
- Upload your image into Brightness & Contrast Adjuster — click, press Enter, or drag it in.
- Adjust brightness, contrast, and saturation (100% is unchanged).
- Choose the output format and, for JPG, a fill colour.
- Click Process, then download the adjusted image.
Why use Brightness & Contrast Adjuster
Brightness, contrast, and saturation.
0–300% so values can not break output.
PNG/WebP can preserve transparency only when source alpha exists and Transparent background is selected; JPG flattens.
Everything runs in your browser on a canvas — your image is never uploaded.
Common uses for Brightness & Contrast Adjuster
Rescue dark or washed-out photos.
Boost contrast and saturation.
Reduce saturation for a muted look.
Quick colour correction before posting.
Frequently asked questions
What can I change in Brightness & Contrast Adjuster?
Brightness, contrast, and saturation, each from 0% to 300%. 100% leaves a setting unchanged; 0% saturation gives greyscale.
Does Brightness & Contrast Adjuster flatten transparency?
Only for JPG output, which cannot store transparency and is filled with your chosen colour. PNG and WebP output can keep transparency when the source has an alpha channel and Background is set to Transparent.
Can I export Brightness & Contrast Adjuster as PNG or WebP?
Yes — save your adjusted image as PNG, JPG, WebP, or same-as-input; JPG and WebP add a quality control.
Are my images uploaded by Brightness & Contrast Adjuster?
No — Brightness & Contrast Adjuster adjusts your image in your browser on a canvas; nothing is uploaded.
Related editing tools
Tools that pair well with Brightness & Contrast Adjuster.