Turn colour photos black and white, with a stronger high-contrast version one tap away
Processed in your browser. Nothing is uploaded. Checked against sources on 15 Oct 2026.Turn a colour photo into a black and white one. Each colour becomes the grey of its brightness, weighted the way the eye sees it, so a green field reads lighter than a red roof of the same strength. Prefer deeper blacks for a portrait or a street scene? Pick the high-contrast version. The photo keeps its format and size, and twenty can be converted at once.
Add the colour photo; it opens already turned black and white in the preview.
Choose High-contrast B&W for deeper blacks, or nudge Contrast and Brightness yourself.
Leave the Output on Same format to keep JPG as JPG and PNG as PNG.
Press Apply and download the black and white photo.
Image Filters changes the look of a photo with one tap: black and white, high-contrast black and white, sepia, vintage, vivid, warm, cool, faded, inverted, sharpened or softly blurred. Each preset is a starting point. Nine sliders then adjust brightness, contrast, saturation, warmth, grayscale, sepia, invert, blur and sharpen, and the preview shows the result on your photo as you move them.
How the colours are worked out. The black and white, sepia, saturation, invert, brightness and contrast formulas are the ones web browsers use for CSS filters, published by the W3C, so a sepia photo here matches a sepia effect on a web page. Black and white weighs green most and blue least (71.5, 21.3 and 7.2 percent for green, red and blue), the way the eye judges brightness, so colours of equal strength do not all turn the same grey. Warmth raises red and lowers blue by up to 12 percent.
Detail. Sharpen strengthens edges with a small 3 by 3 filter; it makes a slightly soft photo crisper but cannot recover a badly blurred one. Blur is measured against the size of the photo, so the preview and the saved file look the same.
The rest of the article, and all 6 questions about Image Filters, are on the Image Filters page.
Drop the photo on the page, tap a preset such as Black and white, Sepia, Vintage or Vivid, and adjust the sliders if you like. The preview updates as you go. Press Apply, then Download. The filter runs in your browser and the photo is never uploaded.
Add the picture and tap Black and white. Each colour becomes the grey that matches how bright it looks, with green weighted most and blue least. For deeper blacks choose High-contrast B&W. The photo keeps its format, so a JPG stays a JPG.
Yes. Add up to 20 photos of up to 50 MB each. The filter you set is applied to every one when you press Apply to all, and they download together as a single zip, each named after its original file with the filter added.
Colour filters change only the colours, never the size in pixels. A JPG or WebP is saved again at the quality you choose, 90 by default, which is hard to tell from the original. PNG is lossless. Strong blur and sharpen change detail by design.
Rates and rules change; check the source before you rely on a figure.
Still stuck? Ask about Image Filters and anybody who knows can answer. No account needed.
Same job, other tools: Compress Image to 1 MB – Trim a high resolution photo to just under 1 MB · Image Converter – Convert between JPG, PNG, WebP, AVIF, BMP, TIFF and ICO, from ten input formats · Crop Image to Square – Make any photo a perfect 1:1 square for profiles and posts · Flip Image – Flip a picture upside down or left to right in one click · Mirror Image – Mirror a photo left to right, fix reversed selfies and text.
On the related tools: HEIC to PNG – Convert iPhone HEIC photos to lossless PNG.