https://gyazo.com/eb5c5741b6a9a16c692170a41a49c858.png
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![](https://gyazo.com/eb5c5741b6a9a16c692170a41a49c858.png | width=100)
- ![](https://gyazo.com/eb5c5741b6a9a16c692170a41a49c858.png | width=100)
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![](https://gyazo.com/eb5c5741b6a9a16c692170a41a49c858.png =250x250)
- ![](https://gyazo.com/eb5c5741b6a9a16c692170a41a49c858.png =250x250)
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![](https://gyazo.com/eb5c5741b6a9a16c692170a41a49c858.png)
If you want all your images to automatically resize to 150 x 150 pixels in the README.md with no additional HTML or CSS in GitHub, the following steps worked for me:
Additional Notes I noticed no matter how large your image is, GitHub image preview in the browser is ~610 x 610 pixels but if you manually copy and paste the image into README.md file it automatically goes to 150 x150 px . You can copy any image from any page on the web and paste it in the README.md, it does the same thing. Be sure to copy image and not image address. I used google Chrome browser for the above steps.