Are NanoTools completely free to use?

Yes, all basic tools on NanoTools are completely free to use with no registration required. We offer premium features for power users.

Is my data secure when using NanoTools?

Your files are processed securely and are automatically deleted after processing. We do not store your files or data on our servers.

No installation required. All tools work directly in your browser on any device - computer, tablet, or smartphone.

We support a wide range of formats including PDF, JPG, PNG, WebP, GIF, JSON, XML, CSV, and many more depending on the tool.

Convert images to grayscale online for free. Transform photos to black and white. Remove color instantly.

Drop an image here or click to browse

image/* • Max 50MB

1

Select color image

2

Transform to grayscale

3

Save B&W image

No, color information is removed. Keep original if you may need color version.

Grayscale typically reduces file size by 30-50% as color data is removed.

Grayscale has shades of gray between black and white, preserving tonal information.

Yes, transparency is preserved in grayscale conversion.