Fix The Error “postman: You need to enable JavaScript to run this app”
JavaScript is a programming language that is handy for programmers and developers to develop applications and websites. Numerous projects are being designed using JavaScript to improve user interaction and interface. Nowadays, almost every website has elements that are written in JavaScript that can be seen on the backend, and the user only sees the interactive websites. JavaScript is a language that is frequently used and programmers can’t imagine programming without it as it has set its foot in the programming world that is irreplaceable. When you are working with JavaScript, you may experience the error warning “postman: You need to enable JavaScript to run this app”.
It’s always normal to encounter errors. The more you fix the error, the better you understand the way to fix it. Every time you get a warning, you find ways to solve it. When you solve it, you know how to handle that in the future. We will provide you with a helping hand to remove the error and also help you to learn. Check out how the error occurs
How do you get the error warning?
When you try to run a project using postman, you land up in the error warning. The error message looks like this
postman: You need to enable JavaScript to run this app
What causes the error
Due to the following reasons, you get the error warning
- Different server port
- Spelling error
- Incorrect URL of the website
Options to Resolve the Error “postman: You need to enable JavaScript to run this app”
We come up with the best possible ways to help you solve the error efficiently. Check out the solutions
Solution 1 – URL edit
This solution is simple yet really effective to fix the error. You need to add or remove ‘/’ at the begging of the url specifically when no hostname is provided. For instance, fetch (/getusername) is not similar to fetch (getusername). It is accepted in the development area, but not accepted in the field when implemented.
Solution 2 – Use the same approach in the browser
It is to understand that postman is incapable of running JavaScript in the console. Using the same approach can help you resolve the error in the web browser. It is really effective.
Solution 3 – Access the URL via the browser
Sometimes you get the error warning because of the incorrect url, you need to access it via the browser. It can fix the error.
Conclusion
In this post, we highlighted the solutions to help you fix the error “postman: You need to enable JavaScript to run this app” simply and effectively. I hope you solve the error using the solutions we share with you. You can choose the one that fits the requirements of your project.
I hope you find it useful!
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Error on POST request: «JavaScript is required. This web browser does not support JavaScript. » #3344
I’m new to Postman and my first try-out ever is causing problems.
I keep getting a «This webbrowser does not support JavaScript. » error whenever I send the Post request, and I should get a Token returned.
I’ve searched the community and other resources as well as google and cannot find a solution to my problem, so I hope you can point me in the right direction.
Attached is screenshots from Postman and the Console
Thanks for your help. 
postman error.txt
The text was updated successfully, but these errors were encountered:
Hi again — thanks for the answer, but I’m not sure if my question was unclear or if I simply dont understand the answer ?!
I use postman to send the attached request — and I should then simply get a response containing a JSON Web Token and thats it, no javascript or anything else.
BUT what I get when using Pretty/Raw or Preview is a html-respons with a Javascrip error text inside. that is my problem.
Hope I’m more clear this time or that you maybe have time to expand on your answer if I simply dont understand it. anyway, thanks for your help!
Cheers,
David
@qualityworld I think this might not be related to Postman. I believe this is coming from the server. Do you have access to this server so that you can debug this.
Great — thanks for pointing me in this direction, I will contact the API developer and ask if they can debug the request from their end!
I am also facing similar problem. API response is coming through browser but not working in postman. Postman return with some html Please enable JavaScript to view the page content.
@prashantagarwal If we belive this response is comming from server — in this case we debug this. If we hit api through browser then we are getting the logs at server side but postman request is not reaching upto server. Request is preflight failed.
What will be the possible errors? Please help. Thanks!
This is a adfs-request to a local server, eg in connection with sharepoint. The redirect after successful authentication there is done via javascript on that page. so, when javascript is not working, there will be no redirect and the error message is shown.
This problem is occurring if one sends the request directly via post, or if you try to do the authorization via eg «Get new Access Token» in the authorization menu.
And of course, this is coming from the server. But the server is from MS and that is the wanted behaviour.
So Postman will have to be able to deal with that.
@LeopoldLerch I have the same problem. Did you manage to find a solution to this?
Same problem i`m facing.
«This site requires Javascript to work, please enable Javascript in your browser or use a browser with Javascript support»
I have a problem with GET, meaning on some website it works and in others it does not. however the problematic website works on chrome.
With the problmatic website I get error 503 on postman, while, again, it works on postman
i have the same problem
i recently developed a simple api with php and while testing it locally it seemed to work fine but when i uploaded it to a server, when i use my browser it works fine but when i use postmen and my other app it returns an error like so 
This problem exist, if you were disabled JavaScript manually in your browser. Otherwise the issue arise from your server side when you are using a free hosting services like InfinityFree. So kindly check with your server whether they provide an enabling feature for JavaScript or not.
Some of them allow Javascript only for web browser and not for API, bot and cURL services. For this, you need to upgrade from free service to premium or else migrate your website to some other free hosting services like 000webhost.
I have encountered this issue today and only on OSX version. Trying to post on Shopify API.
Work fine with most recetn postman on Linux, but on OSX, we’re getting HTML page with information about javascript being disabled. Same collection imported to both Postman instances, only OSX version results with javascript not being enabled.
postman: You need to enable JavaScript to run this app
I’ve got a new API from the backend team in a new project, when I call the api it returns "you need to enable java. ", whereas I had used Postman for another project before. is it related to api, server or something else?
6 Answers 6
I spent some times pondering on this trepidation.. and then suddenly i realized what was going on..
- the endpoint does not exist, it could be a misspelling
- not in the same directory as you expect it to be, try adding or removing "/" at the beginning of the url, particularly if you don’t specify the hostname, i.e. fetch(‘getusername’) is different from fetch(‘/getusername’) . . This acceptable in development but NOT when already deployed, it points to different path.
- the endpoint may be working fine in the Development, but somewhere within in the Production/Staging, it generated some exception.
I don’t think that POSTMAN is capable of executing JavaScript in its console. Try doing the same in the web browser it will work (You won’t see this error message).
While calling the REST API with the postman, if you miss the end-point, then also this issue will come, add the end-point to the URL and check
I updated Postman and now it works. I’m not sure if it was because of the update or the restart.
I had this problem with a project built using the new template in Visual Studio 2022 for a React app with .NET Core.
Tips On Fixing The Error “postman: You need to enable JavaScript to run this app”
Who hasn’t experienced the annoying showstopper where your email or web app suddenly stops working and displays the dreaded ‘postman: You need to enable JavaScript to run this app’ error? This can happen to anyone at any time. In this blog, we will take a look at the different ways in which you can fix this error.
What is “postman: You need to enable JavaScript to run this app”?
When using Postman to run your project, you may get the following error.
Cause of error
When you get this error, you are most likely suffering from one of the following causes:
- The endpoint doesn’t exist; this could be a spelling error;
- The Server port is different.
- Your website’s URL is incorrect
- The endpoint could be working perfectly in Development. However, somewhere the staging or production it caused an error.
How to fix it?
This is a fairly common error, here are some of our solutions. Please consult and choose the appropriate method for your program.
Option 1: Edit URL path
Try removing or adding “/” at the start of the URL, especially when you don’t provide your hostname. i.e. fetch(‘getusername’) is different from fetch(‘/getusername’) . This is fine in the development phase, however not when already implemented in the field, as it indicates a an alternative route.
Option 2: Do the same thing in a web browser
POSTMAN, in our opinion, is not able to perform JavaScript in its console. It may work if you do the same thing in a web browser (you won’t get this error code).
Option 3: Accessing URL through the browser.
If you get the error caused by the wrong URL, try accessing it through the browser.
Conclusion
We hope our blog post on how to solve the “postman: You need to enable JavaScript to run this app” problem was useful. With this information, you should be able to handle this annoyance and a slew of other concerns when you design your application.
Please leave a comment if you want to learn more about the topic or if you have any questions or ideas to share. Thank you for taking the time to read this!