Convert Image to Black and White Online - Free B&W Filter
Instantly convert color photos to black and white (grayscale) for free. Best online image to bw converter. Supports JPG, PNG, WebP. No sign-up required. Save 60% on printing costs.
Drag & drop your image here, or click to browse
Supported: JPG, PNG, WebP, HEIC
How It Works
Upload Image
Click the upload area or drag and drop your color photo. Supports JPG, PNG, WebP, and HEIC formats.
Auto Conversion
The image will automatically convert to grayscale mode. You can preview the result immediately.
Adjust Settings
Switch between different conversion modes (grayscale, line art, invert) as needed.
Download
Choose PNG or JPG format and download for printing or other uses.
Perfect For
Save Printing Costs
Black & white printing costs 40-60% less than color. Pre-converting saves significant ink and toner costs.
Art Photography
B&W photos emphasize light, shadow, texture, and composition, creating timeless artistic effects.
Document Processing
Convert color document scans to B&W, reducing file size for easier archiving and sharing.
Why Choose MakeBW?
Complete Privacy
Images are processed locally in your browser, never uploaded to servers.
Instant Conversion
No waiting for upload/download, conversion happens in milliseconds.
High Quality Output
Maintains original resolution, supports lossless PNG download.
Forever Free
No registration, no payment, no limits whatsoever.
Technical Details
Our grayscale conversion uses the weighted average method, calculated based on human eye sensitivity to different colors: R × 0.299 + G × 0.587 + B × 0.114. This method preserves visual hierarchy better than simple averaging.
Frequently Asked Questions
What's the difference between grayscale and black & white?
Grayscale images contain all shades of gray from pure black to pure white (usually 256 levels), while pure black & white only has two colors. Our tool generates grayscale images, preserving more detail.
Will the image quality decrease after conversion?
No. Our conversion algorithm maintains the original resolution, only removing color information. You can choose PNG format for the highest quality.
Can I use converted images commercially?
Absolutely! The converted images belong entirely to you and can be used for any personal or commercial purpose.
Does it support batch conversion?
Currently, you can only process one image at a time. For batch processing, you can use our tool multiple times—each conversion is instant.