Brightness Adjuster
Brighten or darken an image with a live preview.
Processed entirely in your browser. Your image is never uploaded to a server.
- Simple slider from dark to bright.
- Live preview before download.
- Keeps the original resolution and format.
- Runs in your browser.
Why this is private
- Processed entirely in your browser. Your image is never uploaded to a server.
- Open your browser's DevTools → Network tab while using this tool — you won't see a request carrying your input, because it never leaves your device.
- Nothing you enter is uploaded to a server or shared with us — the processing happens entirely on your device.
Overview
Increases or decreases image brightness with a slider and a live preview. Useful for photos that came out too dark or too washed out.
How to use it
- 1Add an image.
- 2Drag the brightness slider.
- 3Download the result.
Frequently asked questions
What people use it for
Rescue an underexposed photoLift a shot that came out too dark indoors or against the light so the subject is visible.
Tone down a blown-out imagePull back a washed-out photo taken in harsh sun.
Lighten a scan or document photoBrighten a grey-looking scan so text reads more clearly before sharing or printing.
Related guides
- How to resize a photo and signature for online formsApplication portals want the photo and signature at exact pixel sizes and tiny file sizes. Here's how to hit both without an app.
- How to compress images for the web without them looking badWhy images make pages slow, how much quality you can drop before anyone notices, and a repeatable way to hit a size target.
- How to resize an image without losing qualityWhat 'without losing quality' really means when you resize, why enlarging is different from shrinking, and how to keep proportions intact.
- JPG, PNG or WebP: which image format should you use?A practical guide to picking an image format — what each one is good and bad at, and when to convert.
Related tools
All image toolsBrightness & Contrast AdjusterAdjust brightness and contrast together, in one pass, with a live preview.Contrast AdjusterIncrease or reduce image contrast with a live preview.Saturation AdjusterBoost or mute image colour with a live preview.Image FiltersApply photo filters — vintage, warm, cool, fade and more — with adjustable intensity.
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Brightness Adjuster