在开发网站时，经常需要填充一些图片来预览页面效果，如果设计没有提供的素材，这时我们就需要占位图片，
通过 URL 定制形如 placehold.it/300/200 的地址就可以得到一个占位图片。下面就来细数 9 个优秀的占位图片生成网站。
1. https://placeholder.com/
BILLIONS & BILLIONS OF PLACEHOLDER IMAGES SERVED
特点：老牌服务，支持 HTTPS 可定制：尺寸、颜色、文字、格式
How To Set Image Size ------------------> https://via.placeholder.com/150
How To Set Image Formats ------------------> https://via.placeholder.com/300.png/09f/fff
How To Set Custom Text ------------------> https://via.placeholder.com/468x60?text=Visit+Blogging.com+Now
2.http://lorempixel.com/
Placeholder Images for every case. Webdesign or Print. It's simple and absolutely free!
特点：图片分类丰富 可定制：尺寸、图片分类、文字、灰度图
http://lorempixel.com/400/200 ---------------> to get a random picture of 400 x 200 pixels
http://lorempixel.com/g/400/200 --------------->to get a random gray picture of 400 x 200 pixels
http://lorempixel.com/1080/1920/sports ---------------> to get a random picture of the sports category
http://lorempixel.com/1080/1920/sports/4/ --------------->to get picture no. 4/10 from the sports category
3.https://fakeimg.pl/
When designing websites, you may not have the images you need at first. But you already know the sizes and inserting some placeholders can help you better seeing the layout. Don’t waste your time making dummy images for your mockup or wireframe. Fakeimg.pl is a little tool that generates images with an URL. Choose the size, the colors, even the text. It’s free and open-source.
4.http://placekitten.com/
A quick and simple service for getting pictures of kittens for use as placeholders in your designs or code.
Just put your image size (width & height) after our URL and you'll get a placeholder.
特点：喵控必备 可定制：尺寸、灰度图
Like this: http://placekitten.com/200/300 or: http://placekitten.com/g/200/300
5.http://fpoimg.com/
http://fpoimg.com/300x200
http://fpoimg.com/300x200?bg_color=333
http://fpoimg.com/300?text=have%20a%20nice%20day!
6.https://picsum.photos/
The Lorem Ipsum for photos.
Easy to use, stylish placeholders
特点：图片来自高质量图库 Unsplash
可定制：尺寸、指定图片、模糊图片
https://picsum.photos/200/300
https://picsum.photos/200
7.https://placeimg.com/
特点：支持棕褐色图
可定制：尺寸、图片分类、灰度图、棕褐色图
8.http://temp.im/ (国内）
im temp placeholder images, feel free to use it anywhere.
特点：国内速度快 可定制：尺寸、颜色
9.https://dummyimage.com/
https://dummyimage.com/300
https://dummyimage.com/300.png/09f/fff
服务商图片种类定制项HTTPS/SSL
Placehold.it
纯色
颜色、文字
支持
lorempixel
13 类图片
灰度图、文字
支持
Fake images please?
颜色、文字、字体
字体
支持
placekitten
猫咪
灰度图
支持
FPOImg.com
纯色
燕子、文字
支持(无效证书)
Dummy Image
纯色
等比图、颜色、格式、文字
支持
PlaceIMG
5 类图片
灰度图、棕褐色图
支持
Unsplash it
Unsplash
指定图片、模糊图片
强制
temp.im
纯色
颜色
支持(无效证书)