Black & White / Grayscale Image
Convert a photo to grayscale, high-contrast black & white, sepia, or inverted colors in one click. All processing happens in your browser.
不收集数据
没有数据库，没有账户。我们无法查看您的文件。
极速
浏览器原生处理 — 无需上传，无需等待。
100%免费
无限制，无水印，无隐藏费用。
无需账户
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Grayscale, black & white, and sepia explained
Grayscale vs. black & white
"Grayscale" keeps the full range of grays — every pixel becomes a shade between pure black and pure white based on its brightness. This is what most people mean by a "black and white photo."
True high-contrast black & white pushes pixels toward pure black or white, which is dramatic but loses subtle detail. This tool's High-contrast B&W option boosts contrast for that look while keeping the image usable.
Why convert to grayscale?
Grayscale is great for a timeless, editorial look, for reducing distraction, for print where color isn't available, and for accessibility checks (seeing whether a design still reads without color). Sepia adds a warm, vintage tone; Invert flips colors for negative effects or accessibility testing.
Lossless and private
The filter is applied on a canvas inside your browser using hardware-accelerated rendering. Your photo is never uploaded, and you can download the result instantly at full resolution.
Frequently asked questions
Does this work on JPG and PNG?
Yes — any image your browser can open, including PNG, JPG, WebP, and GIF.
Will the original resolution be kept?
Yes. The output matches your original image's dimensions exactly.
What's the difference between grayscale and sepia?
Grayscale removes all color, leaving shades of gray. Sepia replaces colors with warm brown tones for a vintage, aged-photo look.
Is my photo uploaded to a server?
No. Everything is processed locally in your browser; nothing is sent anywhere.