IPX

High performance, secure and easy to use image proxy based on sharp and libvips.

Quick Start

You can use ipx command to start server using:

$ npx ipx

The default server directory is the current working directory.

Programatic Usage

You can use IPX as a Connect/Express middleware or directly use ipx api.

import { createIPX, createIPXMiddleware } from "ipx";

const ipx = createIPX(/* options */);
const app = express();
app.use("/image", createIPXMiddleware(ipx));

Examples

The examples assume that a static folder with buffalo.png file is present in the directory where IPX server is running.

Get original image:

http://localhost:3000/_/static/buffalo.png

Change format to webp and keep other things same as source:

http://localhost:3000/f_webp/static/buffalo.png

Keep original format (png) and set width to 200:

http://localhost:3000/w_200/static/buffalo.png

Resize to 200x200px using embed method and change format to webp:

http://localhost:3000/embed,f_webp,s_200x200/static/buffalo.png

Modifiers

| Property | Docs | Example | Comments | | ----------- | :-------------------------------------------------------------- | :------------------------------------------------------ | :---------------------------------------------------------------------------------------------------------------------------------------------------------------- | | width / w | _ | http://localhost:3000/width_200/buffalo.png | | height / h | _ | http://localhost:3000/height_200/buffalo.png | | resize / s | _ | http://localhost:3000/s_200x200/buffalo.png | | trim | Docs | http://localhost:3000/trim_100/buffalo.png | | format | Docs | http://localhost:3000/format_webp/buffalo.png | Supported format: jpg, jpeg, png, webp, avif, gif, heif | | quality / q | _ | http://localhost:3000/quality_50/buffalo.png | Accepted values: 0 to 100 | | rotate | Docs | http://localhost:3000/rotate_45/buffalo.png | | enlarge | _ | http://localhost:3000/enlarge,s_2000x2000/buffalo.png | Allow the image to be upscaled. By default the returned image will never be larger than the source in any dimension, while preserving the requested aspect ratio. | | flip | Docs | http://localhost:3000/flip/buffalo.png | | flop | Docs | http://localhost:3000/flop/buffalo.png | | sharpen | Docs | http://localhost:3000/sharpen_30/buffalo.png | | median | Docs | http://localhost:3000/median_10/buffalo.png | | gamma | Docs | http://localhost:3000/gamma_3/buffalo.png | | negate | Docs | http://localhost:3000/negate/buffalo.png | | normalize | Docs | http://localhost:3000/normalize/buffalo.png | | threshold | Docs | http://localhost:3000/threshold_10/buffalo.png | | tint | Docs | http://localhost:3000/tint_1098123/buffalo.png | | grayscale | Docs | http://localhost:3000/grayscale/buffalo.png | | animated | - | http://localhost:3000/animated/buffalo.gif | Experimental |

Config

Config can be customized using IPX_* environment variables.

• IPX_DIR

  • Default: . (current working directory)

• IPX_DOMAINS

  • Default: []

MIT