May 26, 2018 · This is how you can get a resized jpeg file from your "myimage" element using Canvas. I commented every line of code so you could understand what I was doing. //jpeg file in the base64 format. The javascript variable "jpegFile" now contains your image encoded into a URL://Base64 format. Which looks something like this:

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Aug 11, 2021 · const blobToImage = (blob) => { return new Promise(resolve => { const url = URL.createObjectURL(blob) let img = new Image() img.onload = => { URL.revokeObjectURL(url) resolve(img) } img.src = url }) }

Oct 6, 2018 · One simple solution for downloading a blob image is to use the Search by Image extension by Armin Sebastian. Search by Image → Open Image will show the blob in a new tab. Right-click that image and choose Save Image As… to save it to a file.

Mar 17, 2025 · By following these simple steps, you can easily convert a JavaScript Blob to a JPG image format. This process is handy when working with image data in web applications or when you need to manipulate image files dynamically.

You can also get BLOB object directly from XMLHttpRequest. Setting responseType to blob makes the trick. Here is my code: var xhr = new XMLHttpRequest(); xhr.open("GET", "http://localhost/image.jpg"); xhr.responseType = "blob"; xhr.onload = response; xhr.send(); And the response function looks like this:

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Oct 11, 2024 · 要将JavaScript中的Blob对象转换为图像，可以使用以下步骤：创建一个URL对象、将URL赋值给图像的src属性、并监听图像的加载事件。 具体实现方法包括：创建一个Blob URL，使用Image对象加载Blob URL，将图像数据插入到DOM中。 接下来，我们将详细介绍这些步骤。 Blob URL是一个临时的URL，用于表示Blob对象的数据。 通过URL.createObjectURL ()方法，可以将Blob对象转换为Blob URL，并将其赋值给图像的src属性。 创建一个Image对象， …

Mar 25, 2025 · The HTMLCanvasElement.toBlob() method creates a Blob object representing the image contained in the canvas. This file may be cached on the disk or stored in memory at the discretion of the user agent. The desired file format and image quality may be specified.