Grayscale image
Upload a photo and FileTinker desaturates it to grayscale, or switch to black & white for a pure two-tone result with an adjustable threshold. It runs entirely in your browser, so your image is never uploaded.
Related conversions
Need pure two-tone instead? Open the dedicated page:
How to convert an image to grayscale
- Upload your image (JPG, PNG, WebP, HEIC and more).
- Choose Grayscale or Black & White, and adjust the threshold if needed.
- Download your converted image.
About grayscale and black & white
Grayscale removes all colour while keeping the full range of brightness, turning a photo into shades of grey — the classic black-and-white-photograph look. It is useful for a timeless aesthetic, for print, for reducing distraction, or for preparing an image for further processing.
True black & white (also called two-tone) goes further: each pixel is forced to pure black or pure white using a brightness threshold you control, which gives a bold, high-contrast, stencil-like result. Both run entirely in your browser, instantly and privately.
Frequently asked questions
How do I convert an image to grayscale?
Upload your image and it's converted to grayscale instantly. Switch to Black & White for a pure two-tone version, and drag the threshold slider to control how much becomes black versus white.
What's the difference between grayscale and black & white?
Grayscale keeps the full range of grey tones, like a classic monochrome photo. Black & white is pure two-tone — every pixel becomes either black or white based on a brightness threshold, for a high-contrast, stencil-like look.
Does it reduce the image quality?
No. The image keeps its original resolution; only the colours change. PNG and WebP stay in their format (with transparency); other formats are saved as high-quality JPEG.
Is my image uploaded?
No. The conversion happens entirely in your browser, so your photo never leaves your device.