Image Contrast Adjuster
Image Contrast Adjuster is a free online image tool for changing PNG, JPG, JPEG, WEBP, and BMP files into PNG files. Image Contrast 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: Contrast amount
- File mode
- 1 input file creates 1 output file
- Cost
- $0, no account required
How to use Image Contrast 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 Contrast Adjuster details
First, Image Contrast Adjuster reads PNG, JPG, JPEG, WEBP, and BMP source files and prepares PNG output for the image workflow. Next, The visible controls are Contrast amount. Additionally, Files and text stay in the browser session.
Drop in an image and download a higher- or lower-contrast version. Uses the standard contrast formula: each channel is pulled toward or away from 50% gray by the factor you set. Positive amounts pop the highlights and shadows; negative amounts mute the image toward gray. Output format matches the input where possible, defaulting to PNG. Conversion runs locally in your browser; files never leave your device.
Common searches
- image contrast
- image contrast adjuster
- adjust image contrast
- increase image contrast
- decrease image contrast
- image contrast tool
Related tools
Tools that work with the same formats — most users open one of these next.
Image to Grayscale
Convert any image to grayscale — pick the algorithm, runs entirely in your browser.
Invert Image Colors
Invert (negate) the colors of any image — runs entirely in your browser.
Image Brightness Adjuster
Brighten or darken any image — drag the amount, runs entirely in your browser.
Image Saturation Adjuster
Boost or mute image saturation — drag the amount, runs in your browser.
Image Hue Rotator
Rotate the colors of an image around the color wheel — runs in your browser.
Image Pixelator
Pixelate any image — drag the block size, runs in your browser.
Frequently asked
What is Image Contrast Adjuster?
Image Contrast Adjuster is a free online image tool for changing PNG, JPG, JPEG, WEBP, and BMP files into PNG files. Image Contrast Adjuster accepts 4 MIME types, returns image/png, includes 1 setting, and runs in your browser on the device.
What files does Image Contrast Adjuster accept and create?
Image Contrast 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: Contrast amount.
Do my files and data stay private?
Yes. Image Contrast 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 Contrast Adjuster?
Open Image Contrast 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 Contrast Adjuster?
Because Image Contrast 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.