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Brightness Adjuster

Brighten or darken an image with a slider, then download a PNG.

Processing: runs in your browser, nothing uploaded

✓ Free to use✓ No sign-up needed✓ Nothing to install

About Brightness Adjuster

Design tools are overkill when you just need one image fix. Brightness Adjuster is built for that job: brighten or darken an image with a slider, then download a PNG.

How Brightness Adjuster changes pixels

Brighten or darken an image with a slider, then download a PNG. Preview before you download so you catch crops, colors, or scaling surprises. PNG keeps transparency when the effect needs it; photo-heavy work may prefer JPG sources.

Where your data goes

Brightness Adjuster runs in your browser for this job. Your image is not uploaded to FileToolsHub servers for the conversion itself, which matters when you are dealing with private notes, drafts, or local files.

Quality tips

Start from the highest-quality original you have. Resize or compress after framing and filters when you need a smaller file for the web. Pair with related image tools below for multi-step edits.

How to use

  1. 1

    Upload an image.

  2. 2

    Drag the brightness slider.

  3. 3

    Download the PNG.

Privacy

Runs entirely in your browser — your image is not uploaded.

Frequently asked questions

Uploaded?

No.

Range?

About −100 to +100 on the slider.

Is Brightness Adjuster free?

Yes. Brightness Adjuster is free for everyday use with no account required, and it runs in your browser.

What do I get as output?

You receive adjusted png ready to copy or download.

Uploaded?

No.

Range?

About −100 to +100 on the slider.

Related tools

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