Html2canvas image quality. This half a pixel was caus.

Html2canvas image quality. html files, every once in a while however, I need to save a plot as a png file. Dec 26, 2024 · A combine usage with jsPDF & html2canvas, which translating html content to PDF file. May 6, 2025 · Need to convert Canvas to Base64 image? This guide keeps it simple, clear, and beginner-friendly. We will be converting the div into base64 string image. To enable png image compression, try using the canvas-png-compression shim, which should be an in-place solution to enable png compression via the quality option. html2canvas(element, { Screenshots with JavaScript. So no need to worry about the overflow part. I already tried increasing scale and dpi, this didn't change much. Simple question searching from last 2 days but didnt find solution i am converting html to pdf using this addHTML api of jsPDF $('#loadPdf'). In order to get a high-quality image in the result, I am using scale property with value 2. Getting started HTML The simplest way to use html2pdf is to download dist/html2pdf. its dpi are very low. Some css attributes are not supported. Apr 23, 2015 · Recently had an issue with images exporting and looking incredibly blurry. However, this returns only very small, low quality . toDataURL(). These dependencies Mar 30, 2025 · In this post, I’ll show you how to easily convert any HTML or React component to an image using html2canvas, a lightweight and widely used JavaScript library. However, if the final image displays closer to it's source size of 1200x1000, then it looks great. Options Explore the different configuration options available for html2canvas These are all of the available configuration options. Is there a way to work with phantomjs without entering the url for the screenshot to be taken? HTML & JavaScript Projects for $10-30 USD. For Simple Screenshots or Quick Tasks Key Features to Look for in Html2Canvas Equivalent Tools 1. 61, While adding an image it adds an blur image even though the image is of high quality, if I the same base64 in on-line decoder it produces the perfect html2pdf. Dependencies html2pdf depends on the external packages html2canvas and jsPDF. I need someone to fix it. Contribute to vosoghi/html2pdf development by creating an account on GitHub. Contribute to eKoopmans/html2pdf. amazonaws. com' }, jsPDF: { format: 'A4', orientation: 'landscape Oct 18, 2016 · Read my question correctly, I dont wanna give the url directly which is required in phantomjs. You can configure filename, page size, margins, orientation, image type/quality, and more using the set() method and options like jsPDF and html2canvas settings. Jun 6, 2015 · Change image size without losing quality via html2canvas Asked 10 years, 4 months ago Modified 10 years, 4 months ago Viewed 2k times Mar 15, 2020 · How to draw an inline SVG onto a Canvas context and then how to generate a downloadable Jpeg or PNG file from what’s drawn on the canvas using toBlob. And there doesnt seem to be a standard way of improving this. now i am capturing this div with html2canvas and then printing it in pdf using jspdf. 0 code (which is n Jul 27, 2015 · I'm rendering a screenshot onclick with HTML2canvas . 9 with the scale option. This half a pixel was caus Mar 4, 2023 · Html2Canvas is a highly versatile and efficient JavaScript library that allows you to take high-quality screenshots of any webpage with ease on the client browser without server-side interaction. js? Yes. js html2pdf. I am aware of the export feature of plotly online. it is a tshirt editor. html files are stored locally so I want to use the ‘download plot as png’ option in the browser. Nov 8, 2022 · I want to print some HTML to an PDF and am using a combination of html2Canvas and jsPDF to achieve that. And fast! Apr 23, 2019 · I am trying to convert my HTML code to image using Html2Canvas Library. toDataURL() or stage. 10. It is a result of html2canvas, as I Jan 27, 2018 · I'm confused with how to designate the size of the image that html2canvas generates. toImage() methods. Now the problem is that the captured image is of very low quality and blurry. . 2. pdf, image: { type: 'jpeg', quality: 0. These options are limited to the available settings for HTMLCanvasElement. Apr 7, 2016 · I would like generate high quality image from DOM element. And if the content height is over 1 pdf, it'll auto seperate it into another Aug 15, 2017 · Fixing HTML5 2d Canvas Blur Understand how to use DPI to fix Canvas Blur The Canvas Blur Issue (If you just want the solution scroll down to Solution) A few months ago I found myself building a … May 7, 2017 · first of all, thank you for an amazing tool for creating PDFs, I appreciate the quality settings and simplicity of its usage! The issue I am solving right now is how can I set the canvas (or an image of it) to the same size as the page of pdf has. Aug 17, 2017 · Hi, I plot a lot of graphs as . There are 3081 other projects in the npm registry using html2canvas. Is there an alternative library I can Jul 18, 2019 · I'm currently converting a div's contents to png via html2canvas, however the use of scale: 5, or dpi: etc. Written in Typescript. I am trying to capture a div with canvas inside. I wonder is it possible to download the image with higher quality (at least 800px width?)? Jul 9, 2013 · But the quality of the image is rather blurry/poor. 1 and want to save the image to user's local computer. Im really glad this option was added. 98 }, html2canvas: { scale: 2, useCORS: true, width: 1300, allowTaint: false, logging: false, proxy: 'https://bucket-name. resume-results"), { May 26, 2018 · I tried to use html2canvas to get image screenshot byte from website. If the file format is not specified, or if the given format is not supported, then the data will be exported as image/png. open in example to simplify it - same quality problem) However the image sharpness / qua Jul 18, 2018 · I'am using html2canvers library to create invoice and download as PDF(A4 size PDF). However, when websites and apps push the Canvas API to its limits, performance begins to suffer. ⚠️ There have been several issues reported in v0. 1, last published: 4 years ago. Jun 4, 2024 · filename: 'receipt. Sep 14, 2021 · Hello @TukuToi and @eKoopmans, thank you for the excellent and practical html2pdf. pngs. However, if you prefer Feb 4, 2016 · The image is captured from a DIV using HTML2CANVAS, but the image quality is very poor and it pixalets. png file, and it works! (just using window. min. It achieves this by rendering the content directly within the browser, without needing server-side processing or external image generation services. html2pdf html2pdf converts any webpage or element into a printable PDF entirely client-side using html2canvas and jsPDF. Also the toDataURLHD is experimental and does not work any ways. js library. Is there any way I can retain the 300 dpi image quality in the output from html2canvas? Aug 10, 2019 · How to improve quality of Html2Canvas? Set your ALL div’s 2x higher, your IMG 2x higher, and finally set html zoom on 0. js development by creating an account on GitHub. Jan 10, 2019 · jsPDF needs html2canvas to be declared in the global scope to work, so you have to write window. By default in Konva, exported images have the pixelRatio attribute set to 1. 33) or more, (the original image sizes are assumed to be larger). Mar 8, 2016 · I want to reduce image quality before exporting everything to PDF. HTML5 Canvas Export to High Quality Image Tutorial If you need to export a stage as an image or as base64 then you can use the stage. this might cause a blink - depending on your app requirements it might be a reasonable solution. The function is looking like: html2pdf(someNode, { margin: 3, filename: 'name. Looking at the html2canvas logs I saw the x position and crop position were returning as 174. Thanks. js to be able generate PDF documents of WEB pages. bundle. The closest I got was with the following code. 3" in npm, or use cdnjs for HTML script tags). But there is a problem on html2canvas, it generates blurry images from the html. toDataURL() method returns a data URL containing a representation of the image in the format specified by the type parameter. May 1, 2025 · Can I customize the PDF output with html2pdf. js实现（可选搭配Canvas2Im Mar 20, 2025 · This article compares the top 4 website screenshot APIs and JS libraries you can use to replace Html2Canvas. Jul 10, 2013 · Most helpful comment +1 for this. For example, I'd like to be able to have my DIV remain 400px x 400px but have the rendered image be 1200px x 120 Sep 11, 2025 · The HTMLCanvasElement. My desired quality is ~1200x600, but the Jan 24, 2017 · 0 I am using html2canvas library to get image from a div. Specifying Image Format By default, a canvas created via html2canvas is converted to a PNG format image. I wonder is it possible to download the image with higher quality (at least 800px width?)? I want to set the quality factor when I encode a canvas element to jpg. How can this be accomplished? Please note that I'm a beginner, so actual code will be m Jun 3, 2025 · The <canvas> element is one of the most widely used tools for rendering 2D graphics on the web. Start using html2canvas in your project by running `npm i html2canvas`. pdf': Specifies the filename of the generated PDF file. I cannot use this feature though since the plot needs to be saved in May 19, 2021 · Usually, it shouldn't be a problem, but I am not sure how HTML2Canvas fetches the image data to render it to canvas. The second one is invalid, image width or height May 7, 2013 · Images in JPG format (I tested with 100% quality) and PNG format images with 8bit are low-quality canvas generated by html2canvas. function html2img2pdf() { html2canvas($(". 6 million monthly Nov 7, 2018 · I am using HTML2Canvas and it works fine but the download is kind of blurry and I am wondering how to fix it here is my code. May 28, 2025 · The issue I'm running into is when I copy the canvas using html2canvas at scale: 1 it is way lower quality than the original canvas on the webpage when pasting into the email client. The source image Oct 22, 2021 · I use something like html2canvas to download the image from my webpage, but the quality is so low (300px width). The captured image resolution is 96 dpi, how to increase the resolution ? Apr 29, 2014 · The only way we solved a similar problem was to enlarge canvas, (hide body, timeout, show body -> forces the DOM to re-render), render html2canvas, and then bring back normal size. The desired file format and image quality may be specified. Jan 9, 2025 · Learn how you can convert your div tag into an image using html2canvas library. If you wish to exclude certain Element s from getting rendered, you can add a data-html2canvas-ignore attribute to those elements and html2canvas will exclude them from the rendering. Capturing Complex or Dynamic Web Pages 2. For that I am using html2canvas, and it works fine, but the quality is too low. has no affect whatsoever on consequent image quality. I am using html2canvas in an effort to get a screenshot of a webpage and render it as a thumbnail (well, 400x300, not exactly a thumbnail). Downloaded file size was large (7MB - 13MB) always. 9. This approach gives you more flexibility but requires more code. Do you know how can I change my approach in order to achieve better quality ? Oct 14, 2023 · How can I improve the image quality when using html2canvas in my web application, as the generated image is of lower quality than expected, and I need it to have specific dimensions like 1200×600? Oct 10, 2022 · [Found solution by Adelaide Fields] Add the “scale” parameter to the html2canvas object,Remove the “dpi” parameter of html2canvas,Open your code file and navigate to t Sep 18, 2023 · Cons of html2canvas Image quality low compared to other options. How It Works Use html2canvas to render the HTML element to a canvas Create a new jsPDF instance Convert the canvas to an image Add the image to the PDF Save or display the PDF Implementation Here html2pdf. May 7, 2017 · I am using jsPDF and it uses html2canvas to generate an image from some html element and insert on the . But I noticed that the converted image appears blur. I'm using version 0. They are being investigated but in the meantime you may wish to remain on v0. Dec 3, 2019 · When html2canvas renders the image, it limits the capture to the visible area of the screen. Dec 27, 2017 · Are you using scale: 1? For jpeg output, you can define the quality level (as you mentioned), but apart from that I don't really know what else can really be done, (or is in the scope of html2canvas). But the problem is that the quality of images inside the output image are low quality when upscaling. I have seen some reference to DPI as an option but it appears that it may have been removed on the current version? I have also seen that the scale option, in combination with width and height options, being used and that works for web view but when saving the image on my computer it's Nov 29, 2024 · vue 2， vue 3，uniapp， html2canvas 截图模糊， html2canvas 截图失真怎么 解决，截图 清晰度 调整，改 清晰度 配置了还是不行，截图 图片 有些看不清，截图另存 图片 模糊 问题解决 办法， html2canvas生成图片 模糊，H5海报利用 canva s导出后不太清楚，为什么 html2canvas Jan 9, 2018 · I'm using the currently latest html2canvas v1. html2pdf converts any webpage or element into a printable PDF entirely client-side using html2canvas and jsPDF. Is there a way to reduce the file size and maintain the quali Mar 17, 2025 · Step 5: Using jsPDF with html2canvas For more control over the PDF generation process, you can use jsPDF and html2canvas separately. 3 ("^0. Follow along in minutes! May 25, 2016 · I am using the latest version of jsPDF 1. Im using html2canvas to grab a snapshot of a div, and what I need to do is scale it up to 750x1050 before saving it to a png via canvas. And if the content height is over 1 pdf, it'll auto seperate it into another Aug 17, 2017 · Hi, I plot a lot of graphs as . All the images are in 300 dpi but the html2canvas produces output in 72 dpi. on('click', function() { var pdf = new jsPDF('p I use something like html2canvas to download the image from my webpage, but the quality is so low (300px width). However, the screenshot result ended with poor resolution. I tried to scale up element using css "zoom" by without success ;( zoom is not implemented? html2pdf. At first, the PDFs were being generated in high resolution, b Feb 15, 2025 · I tried increasing scale in html2canvas and many other configs of html2canvas and jsPDF options, nothing works well for me. html2canvas offers an array of options allowing fine-tuning of these image save settings. That said, I wasn't able to make it work either, so I resorted to a wrapper that works around the issue by calling manually html2canvas() then giving the resulting canvas to jsPDF. You can use it as a template to jumpstart your development with this pre-built solution. 0-alpha. Jan 30, 2013 · I'm trying to capture a div into an image using html2canvas I have read some similar question here like How to upload a screenshot using html2canvas? create screenshot of web page using html2can Client-side HTML-to-PDF rendering using pure JS. The div contains collection of image in masonry. toBlob() method creates a Blob object representing the image contained in the canvas. Looking to get an image with html2canvas to insert into a PDF, but getting a blurry quality. Latest version: 1. In other words, if the returned value starts with data:image/png Apr 14, 2025 · Html2Canvas vs Dom-to-Image: Performance & Quality Html2Canvas vs Html-to-Image: What’s the Real Difference? Use-Cases Where Html2Canvas Equivalents Work Better 1. In my ongoing saga in using jsPDF, html2canvas and now html2pdf to capture a div element in order to export the html content as a PDF, I'm having some and issue on 3 fronts. Speed and JSFiddle - Test your JavaScript, CSS, HTML or CoffeeScript online with JSFiddle. Aug 21, 2024 · 一、实现HTML页面保存为图片 1. Comprehensive comparison of html2canvas, html-to-image, dom-to-image, screenshot-desktop npm packages, including features, npm download trends, ecosystem, popularity, and performance. Fork from dom-to-image with more maintainable code and some new features. This must be an object with the following fields: These options are limited to the available settings for HTMLCanvasElement. I read something about dpi (dots per inch) in relation to images, but I couldn’t… Jul 31, 2018 · The image looks good on the computer screen but after using html2canvas, the image loses quality. My guess is that you are running in to a CORS problem because the images are loaded using XMLHttpRequest as a blob in a mixed local/remote/server setup. 1 已知可行方案 现有已知能够实现网页保存为图片的方案包括： 方案1：将DOM改写为canvas，然后利用canvas的toDataURL方法实现将DOM输出为包含图片展示的data URI 方案2：使用html2canvas. Resources: Official Website GitHub Repository npm Package Codepen Demo StackOverflow Example Tutorial 2. See Apr 17, 2023 · Hello community, I recently learned how to capture and convert section of web page into image and save into database. When Speed Is a Priority 3. Image type and quality You may customize the image type and quality exported from the canvas by setting the image option. toDataURL( "image/jpeg" ); It does not give me a quality option. This screenshots show diffrence between quality before (first screenshot) and after (second screenshot) usage of html2pdf. Is there any way html2canvas can return an image at a higher resolution? What is html2canvas? html2canvas is a JavaScript library that allows you to take “screenshots” of web pages or specific elements on a web page and render them as images on the client-side. html2canvas = html2canvas; somewhere before you call html(). Mar 23, 2016 · Using html2canvas i'm trying to capture a div and save it as a . The PNG-24bit are normal. var data = myCanvas. Configuring Image Saving Options When capturing a webpage or specific component as an image, you might want to alter the resulting image's format, quality, and other attributes. 4. I did some googling & found out that by default it just returns an image at 96 dpi. Based on the Screenshot console code, everything works g Apr 23, 2025 · Confused between DOM to Image and html2canvas? Learn how they differ, what they do, and which one fits your needs best. If document span more than 3 to 6 pages in PDF, its file size increases heavily (getting very high quality image), ~40 MB. This file may be cached on the disk or stored in memory at the discretion of the user agent. Jun 24, 2019 · I'm using html2canvas and jspdf to create pdfs from a html page. Jul 31, 2018 · How do you get better image quality? The standard DPI seems to be 72 which is not good enough for my case. May 12, 2025 · Best for: Web applications needing simple screenshot functionality with good browser compatibility. Feb 26, 2025 · html2pdf. Easily capture and convert web page screenshots into images by HTML2Canvas. s3. The . js converts any webpage or element into a printable PDF entirely client-side using html2canvas and jsPDF. 0. This is the original div picture: and this is the printed version of that div: Feb 9, 2020 · This allows HTML2Canvas to extract the correct HTML sections. I have a bad quality image from html2canvas. Browser API: getDisplayMedia Jan 27, 2022 · I finally got my html2pdf to work showing my web page just how I want it in the pdf(Any other size was not showing right so I kept adjusting the format size until it all fit properly), and the end Home › How-to › javascript › How to Easily Create Images from HTML Content Using JavaScript HTML-to-Image Conversion with JavaScript February, 20th 2025 2 min read Table of Contents Method 1: Using html2canvas How It Works Implementation Method 2: Using dom-to-image How It Works Implementation Key Considerations Alternative: Using SVG and Canvas Choosing the Right Solution Converting Jan 27, 2022 · I finally got my html2pdf to work showing my web page just how I want it in the pdf(Any other size was not showing right so I kept adjusting the format size until it all fit properly), and the end ️ Generates an image from a DOM node using HTML5 canvas and SVG. 5, or if you want better quality yet, set 3x higher (in this case the html zoom must be 0. I am using the library to convert HTML pages, with a couple of images, into PDFs. 5. Looking for advice to improve screenshot quality. js to your project folder and include it in your HTML with: May 15, 2023 · I'm using html2pdf. Jan 1, 2024 · 我们可以通过设置生成的图片分辨率来提高图片的清晰度。 html2canvas提供了一个“dpi”参数，可以用来设置生成图片的分辨率。 默认情况下，该参数为96，即每英寸96个像素。 我们可以将其设置为更高的值，比如300，来提高生成图片的清晰度。 Client-side HTML-to-PDF rendering using pure JS. Oct 1, 2017 · This is stripped off of course when saving out canvas, but it does not alter the image resolution (provided the canvas is of the same pixel resolution as the original image) so there will be no drop in print quality (compression via JPEG can of course affect general quality, but for actual resolution there is no change). pdf file. html-to-image Overview: html-to-image is a fork of dom-to-image with improved maintainability and additional features, gaining significant popularity in 2025 with over 1. Apr 17, 2023 · I recently learned how to capture and convert section of web page into image and save into database But I noticed that the converted image appears blurred I read Explore the different configuration options available for html2canvas Html2Canvas Blurry image solved Edit the code to make changes and see it instantly in the preview Explore this online Html2Canvas Blurry image solved sandbox and experiment with it yourself using our interactive online playground. toDataURL (), which ignores quality settings for 'png' images. Here is the code for converti Apr 20, 2021 · Here’s Why I’m Replacing html2canvas With html-to-image in Our React App A comparison of the two libraries for capturing React components as images I recently wrote an article about capturing … Client-side HTML-to-PDF rendering using pure JS. This often leads to incorrect images or missing parts. It all works just fine, however, the image quality is quite poor and doesn't look very sharp Aug 20, 2021 · Increase image quality using Html2Canvas Asked 3 years, 7 months ago Modified 3 years, 7 months ago Viewed 224 times Aug 20, 2021 · Increase image quality using Html2Canvas Asked 3 years, 7 months ago Modified 3 years, 7 months ago Viewed 224 times Mar 25, 2025 · The HTMLCanvasElement. Then, the only thing that worked for me, was to add the following code into my css. Integrate this JavaScript library into your projects for screenshot. ap-northeast-1. I cannot use this feature though since the plot needs to be saved in Dec 26, 2024 · A combine usage with jsPDF & html2canvas, which translating html content to PDF file. html2PDF function will auto fit the target dom width into PDF size. image: { type: 'jpeg', quality: 500 }: Configures the image type and quality for any images included in the PDF. But they produce a blurry image. This article provides suggestions for optimizing your use of the canvas element to ensure that your graphics perform well. html2canvas: { scale: 1 }: Sets the scale factor for rendering the HTML content to a canvas element. We also had difficulty with the quality of the background image, since we were using background-size: cover; Oct 15, 2023 · I need the user to upload 2+ images and I need to combine the images into one. Contribute to GigaZiv/html2pdf development by creating an account on GitHub. toy3ar wo jb96 yb3umk9n 9cqs 2z 0q7eh x4ceg kbktgc rhjv