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We will change our upload function to only allow excel file by adding a fileFilter option provided by Multer. Conclusion. Why my question is it not answered?? To quickly run the application follow the below steps. Maybe oversight. I hope by now, your issue has been resolved. how to read headen fields data of a xls(or)xlsx file. i want read properties of a uploaded excle file like author name,when it is modified, bcoz i want to check wheather uploaded xls(or)xlsx file are my own formated file are not, if it is not my formated file i want to intimate to end user. Deleting the uploaded file. Hi, Thanks for the great example, but the try block throws “code: LIMIT UNEXPECTED FILE”, “field: contactsFile” try exceltojson( input: req.file.path, output: null, //since we don’t need output.json lowerCaseHeaders:true >, function(err,result) if(err) return res.json( ); > res.json( ); >); > catch (e) Hi Rahil, i have tried this solution am getting issue while installing module xlsx-to-json-lc. I have tried to execute the command npm install -g [email protected] and also tried npm install -g xlsx-to-json-lc still am getting same error. 58 comments. And your form filed name should match with the selector. Update: Versions for the given packages are updated into package.json ( [email protected] [email protected] ). This involves fix to dependencies beign depriciated in th original packages. After this Node.js tutorial, you will be able to upload an excel file on your application to a particular path, read the file and convert it into JSON data and then, obviously, you can do whatever you want with that programmatically sensible data. We will be taking care of two formats of excel files. That is converting ‘.xls’ to json and ‘.xlsx’ to json. Remember we have two different node modules for the two excel extensions. We will first check the extension of the incoming file and then depending on it, we will use the right module. Let us get started. Update: Versions of the given packages are updated into package.json ([email protected] and [email protected]). This involves fix to dependencies being depreciated in the original packages. Note: The below section deals with uploading of the files further, if not required you can directly skip to Read and convert excel to json further below. To run the app just navigate into your working directory using the command line tool and run. Excel to JSON is a regular requirement for web applications. This tutorial explains how easy it is to accomplish excel to JSON in Node.js. Update: Versions of the given packages are updated into package.json ([email protected] and [email protected]). This involves fix to dependencies being depreciated in the original packages. Hey ! Your tutorials were amazing ! I am a beginner in node.js, and i am currently working on a projectwhich involves the use of highcharts. I have made a server using node.js and successfully loaded a csv file onto the server. I need to plot graphs in highcharts using the data present in the csv file , and i am stuck with this step. Could you help em out with this ? Regards Tushar Upadhyay. Hi Prasad, I will have to look into your code to answer your question. Probably there would be some minor thing that you are missing, you can create a plkr or mail me your code. There is an option that accepts sheet name, by default it reads the 1st sheet. Sometimes in an application, you may have a requirement to upload data via an excel file or a job to read data from a bunch of excel files or maybe run some analytics. Dealing with excel files is common in web applications. This tutorial aims to make reading excel files using NodeJS easier for developers. In short, we will learn how to convert excel to JSON in Node.js. Hi, This is how my output is shown in postman, after running your code. Please help me out “error_code”: 1, “err_desc”: “No file passed” > Use this code just below the excel to json conversion. req.file.path would refer to the currently uploaded file. Keep Learning… That may happen if you have saved some other format as .xls or .xlsx. Thanks for the wonderful tutorial. I am new to this and learning. my req is to send the json output to a database and return to the home screen with a success message ( an alert would do) . I was able to send the result (json) to a mongodb collection. However, I wasn’t able to stop the json output showing up on the sceen, I commented the below line and did a plain ‘return’, but that doesn’t work. Can you pls guide me on how to do that? res.json( ); Adding filetype filter. Rahil, fantastic job with this, you helped me get over a major hurdle I’d been stuck on for too long. Again, well done. Setup Node express server and routes Upload file, using Multer Read and convert excel to json. Setting Up Express server and Multer for upload. Roadmap. The download link is provided in the article. Thanks for stopping by, Aaron. excel to json, Node.js, xls to json, xlsx to json. Get 100$ FREE credit & hosting at scale. Our final files look like this. Hi, the code works fine for me . But how do u insert the uloaded excel data into mysql db. Now if you run your app, you will be able to upload any file into our uploads directory. But we need to restrict our app to only allow excel files i.e (.xls, .xlsx) excel to json demo. Hi, Am using this module for converting xls file to json format. I have newly created xls file. But when I uploaded this file, its returning corrupted file even though its a valid xls file. Now I will be picking up the code from the file upload tutorial and adding it to my app.js . At the same time, we will be removing the unwanted code blocks. Check-out the Multer memoryStorage option. Implementation. Read Excel Files and convert to JSON in Node.js. Demo and Quick setup. npm ERR! Please include the following file with any support request: npm ERR! C:\New Node JS Workspace\npm-debug.log. Start by requiring our modules into our app.js . Hey.. Great articel!! By the way, How to extend this to support multi sheet reading in the same excel file? About Rahil Shaikh. Hi at a quick glance, I think your uploads.array seems to be invalid. Should be of the form. In some cases, you may not want to keep the uploaded excel file on the server. Here is a piece of code for deleting the uploaded files as soon as they are converted. npm ERR! Windows_NT 6.1.7601 npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\ node_modules\\npm\\bin\\npm-cli.js" "install" "-g" "[email protected]" npm ERR! node v6.9.4 npm ERR! npm v3.10.10 npm ERR! code ETARGET. How to save the converted data to the disk? I am using webpack with node. Is there anything wrong that I’m doing, because I have just copied and pasted your code. But What I have picked up again is that, it only throws that error when I’m uploading any 97 excel file. Please assist. Thanks.. Can you send me a sample of your excel file? I’ll try at my end. Read and convert excel to json. Now, that we are able to upload files on our server and that we have added the extension validation. The next challenge is to read the uploaded file and convert it to JSON. Hi Abdulaziz, CipherTrick has a good collection of NodeJS tutorials, you can browse them on this website. We also have a YouTube Channel where you can find excellent video tutorials, make sure you subscribe to us.