Image Brightness Adjuster
Image Brightness Adjuster is a free online image tool for changing PNG, JPG, JPEG, WEBP, and BMP files into PNG files. Image Brightness Adjuster accepts 4 MIME types, returns image/png, includes 1 setting, and runs in your browser on the device.
Drop .png / .jpg / .jpeg / .webp / .bmp file here
or click to choose — or paste an image with ⌘V / Ctrl+V
Options
Key facts
- Input
- 5 formats: PNG, JPG, JPEG, WEBP, and BMP (image/png, image/jpeg, image/webp, image/bmp)
- Output
- PNG (image/png)
- Runtime
- your browser on the device
- Settings
- 1 control: Brightness amount
- File mode
- 1 input file creates 1 output file
- Cost
- $0, no account required
How to use Image Brightness Adjuster
- 1
Open your PNG, JPG, JPEG, WEBP, BMP file
Drop your PNG, JPG, JPEG, WEBP, BMP file onto the page, or click to browse and pick one from your device.
- 2
Choose options
Adjust the conversion options to suit your needs. Defaults work well for most inputs.
- 3
Convert and download
Click Convert. Your PNG file is ready to download in seconds.
Image Brightness Adjuster details
First, Image Brightness Adjuster reads PNG, JPG, JPEG, WEBP, and BMP source files and prepares PNG output for the image workflow. Next, The visible controls are Brightness amount. Additionally, Files and text stay in the browser session.
Drop in an image and download a brighter or darker copy. Each R/G/B channel is shifted by the amount you set: positive values brighten, negative darken, 0 means no change. Output format matches the input where possible (PNG / JPG / WebP), defaulting to PNG so transparency is preserved. Conversion runs locally in your browser; files never leave your device.
Common searches
- image brightness
- image brightness adjuster
- adjust image brightness
- brighten image
- darken image
- image brightness tool
Related tools
Tools that work with the same formats — most users open one of these next.
Image Cropper
Crop any image (PNG, JPG, WebP, GIF, BMP, AVIF) right in your browser — drag a box, hit crop.
Image to Grayscale
Convert any image to grayscale — pick the algorithm, runs entirely in your browser.
Image to Sepia
Apply a classic sepia tone to any image — adjustable intensity, runs in your browser.
Invert Image Colors
Invert (negate) the colors of any image — runs entirely in your browser.
Blur Image
Blur any image with an adjustable radius — fast separable box blur, runs in your browser.
Rotate Image
Rotate an image 90°, 180°, or 270° — lossless, runs entirely in your browser.
Frequently asked
What is Image Brightness Adjuster?
Image Brightness Adjuster is a free online image tool for changing PNG, JPG, JPEG, WEBP, and BMP files into PNG files. Image Brightness Adjuster accepts 4 MIME types, returns image/png, includes 1 setting, and runs in your browser on the device.
What files does Image Brightness Adjuster accept and create?
Image Brightness Adjuster accepts PNG, JPG, JPEG, WEBP, BMP files (image/png, image/jpeg, image/webp, image/bmp) and creates PNG files (image/png). The page includes 1 setting: Brightness amount.
Do my files and data stay private?
Yes. Image Brightness Adjuster runs entirely in your browser using your device's CPU. Files and text are never uploaded to our servers, so your data stays private.
How do I use Image Brightness Adjuster?
Open Image Brightness Adjuster, drop in your PNG, JPG, JPEG, WEBP, BMP file, choose any options, and click Convert. Your browser does the work locally and produces a PNG file you can save right away.
What is the maximum file size for Image Brightness Adjuster?
Because Image Brightness Adjuster runs in your browser, the maximum size depends on your device's available memory. Most modern phones and laptops handle files up to a few hundred MB without issues.