灰度

Use the free online 灰度 tool. Fast, private and easy to use — runs entirely in your browser. Part of our 图像与媒体 collection.

Drop an image here or click to select Everything runs in your browser — no upload happens.

压缩图片

Quality

Compress JPG, PNG and WebP images to a smaller file size without leaving your browser.

Width Height

Change the width and height of any image to exact pixel dimensions.

Target

Convert images between WebP, JPG and PNG formats instantly.

Turn a JPG photo into a smaller, modern WebP file.

Convert a WebP image back to a widely-supported JPG file.

Shrink a PNG by converting it to an efficient WebP image.

Convert a transparent PNG into a compact JPG photo.

Rotate an image 90 degrees left or right as many times as you like.

Mirror an image horizontally or vertically.

Turn a colour photo into black and white in one click.

Give any photo a warm, vintage sepia tone.

Strength

Softly blur an image; higher strength gives a stronger effect.

Block size

Create a pixel-art or censored look with adjustable block size.

X Y Width Height

Crop a rectangular area from an image by position and size.

Encode an image as a Base64 data URL to embed directly in HTML or CSS.

Is the 灰度 free to use?

Yes. The 灰度 is completely free with no sign-up, no limits and no watermarks. You can use it as many times as you like.

Is the 灰度 safe and private?

Absolutely. The 灰度 runs entirely in your browser, so your data never leaves your device and nothing is uploaded to a server.

Do I need to install anything to use the 灰度?

No installation is needed. The 灰度 works instantly online in any modern browser on desktop, tablet or mobile.

Does the 灰度 work on mobile phones?

Yes. The 灰度 is fully responsive and works smoothly on iPhone, Android and any other device.