No, you can't.
It's a security/anti-phishing feature.
Answer from Pierreten on Stack OverflowSpiceworks
community.spiceworks.com › programming & development
want change title of alert box in javascript - Programming & Development - Spiceworks Community
October 24, 2007 - hi, i want change title of javascript alert box to my own can you help me
Videos
12:14
How to Create Custom Alert Box using Javascript Tutorial - YouTube
06:41
Replace JavaScript Alert Box with Sweet Alert JS Dialogs - YouTube
09:59
How to Create Custom Alerts with Animations using HTML CSS JavaScript ...
14:40
remove/replace default title in Alert/Confirm message Box using ...
15:08
Remove/Replace default title in an Alert/Confirm message Box using ...
03:56
How to Create Custom Alert Box in Javascript using SweetAlert JS ...
W3Schools
w3schools.com › js › js_popup.asp
JavaScript Popup Boxes
The window.alert() method can be written without the window prefix.
MDN Web Docs
developer.mozilla.org › en-US › docs › Web › API › Window › alert
Window: alert() method - Web APIs | MDN
window.alert() instructs the browser to display a dialog with an optional message, and to wait until the user dismisses the dialog.
GeeksforGeeks
geeksforgeeks.org › javascript › how-to-edit-a-javascript-alert-box-title
How to Edit a JavaScript Alert Box Title ? - GeeksforGeeks
August 5, 2025 - We can't directly modify the title of the alert box because the title is controlled by the browser and cannot be changed by JavaScript.
Reddit
reddit.com › r/html › how do you change javascript alert title?
r/HTML on Reddit: How do you change JavaScript alert title?
December 27, 2016 -
Instead of “this page says” I would like to change the text to something else.
Top answer 1 of 5
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you can't. modern browsers will not allow you to change the alert for security reasons. if you need to set it for some reason, use a modal or some other way of letting the user know.
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Coderanch
coderanch.com › t › 118308 › languages › changing-title-alert-box
changing title of alert box (HTML Pages with CSS and JavaScript forum at Coderanch)
Hi all, I am trying to use JavaScript to pop up error/warning messages on my JSP page. Is there any way to change the title of the alert box in java script? On IE, the title appears as "Microsoft Internet Explorer" and for Mozilla the title appears as the URL of the page.
Google Groups
groups.google.com › g › phpdesktop › c › 4D6flx8iMQA
javascript alert title
Such behavior cannot be replaced with javascript. For now you could disable these functions for example: window.confirm = function(s) { return false; } window.prompt = function(s) { return ""; } Star Issue 73 and you will be notified when titles for javascript dialogs get fixed.
W3Schools
w3schools.com › jsref › met_win_alert.asp
Window alert() Method
It prevents the user from accessing other parts of the page until the alert box is closed. ... If you want to use W3Schools services as an educational institution, team or enterprise, send us an e-mail: sales@w3schools.com · If you want to report an error, or if you want to make a suggestion, send us an e-mail: help@w3schools.com · HTML Tutorial CSS Tutorial JavaScript Tutorial How To Tutorial SQL Tutorial Python Tutorial W3.CSS Tutorial Bootstrap Tutorial PHP Tutorial Java Tutorial C++ Tutorial jQuery Tutorial
Top answer 1 of 15
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https://estk.aenhancers.com/8%20-%20ExtendScript%20Tools%20and%20Features/user-notification-dialogs.... · Global alert function · Displays a platform-standard dialog containing a short message and an OK button. · alert() · alert(message[,title,errorIcon]); · message · The string for the displayed message. · title · Optional. A string to appear as the title of the dialog, if the platform supports a title. Mac OS does not support titles for alert dialogs. The default title string is “Script Alert.” · errorIcon · Optional. When true, the platform-standard alert icon is replaced by the platform-standard error icon in the dialog. Default is false. · Returns undefined
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Don't know Mac, but you can try something like this... · alert("Your message here...", "Whateveryouwant");
Oreate AI
oreateai.com › blog › alert-title-javascript › 19b571d2ec1f73e034cd289acd1be19d
Alert Title Javascript - Oreate AI Blog
January 7, 2026 - Explore how JavaScript alert functions enhance web interactivity through simple notifications and prompts while balancing usability against potential annoyances.
Sprymedia
sprymedia.co.uk › article › Alert+-+Javascript+dialogue+controls
Allan Jardine | Reflections | Alert - Javascript dialogue controls
Javascript offers two very useful input controls which block the user from all other interaction with a web-page (alert and confirm), however they are not particularly flexible, attractive or even meaningful at times. Therefore I introduce the Javascript class 'Alert' which provides customisable dialogue input controls.
101 Computing
101computing.net › home › html, css & javascript › javascript: alert, prompt or confirm?
Javascript: Alert, prompt or confirm? - 101 Computing
November 24, 2019 - They enable you to write basic programs based on the Input/Process/Output very easily. alert("...") An alert box is an easy approach in javascript to display a message to the end user.
Anvil
anvil.works › docs › client › alerts-and-notifications
Anvil Docs | Alerts and Notifications
dismissible - Whether this modal can be dismissed by clicking on the backdrop of the page. An alert dismissed in this way will return None. If there is a title, the title bar will contain an ‘X’ that dismisses the modal.
Justice
design-patterns.service.justice.gov.uk › components › alert
Alert - MOJ Design System
An alert needs a title, which does not need to be displayed as a heading. The title gives each alert a unique label and helps screenreaders to identify the alert.
Ed
softdev.ppls.ed.ac.uk › online_experiments › 05_javascript.html
An introduction to JavaScript
var greeting = "good morning"; window.alert(greeting);
Ktui
ktui.io › docs › alert
Alert - KTUI
<div class="space-y-5"> <div class="kt-alert" id="alert_1"> <div class="kt-alert-icon"> <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-info text-muted-foreground" aria-hidden="true" > <circle cx="12" cy="12" r="10"></circle> <path d="M12 16v-4"></path> <path d="M12 8h.01"></path> </svg> </div> <div class="kt-alert-title">This is a default alert</div> <div class="kt-alert-toolbar"> <div class="kt-alert-actions"> <button class="kt-link kt-link
Web Designer Forum
webdesignerforum.co.uk › web development › frontend
What am I doing wrong with this Javascript code? - Frontend - Web Designer Forum
August 12, 2014 - I'm learning to use JavaScript using video tutorials on YouTube, I've just been doing some practising on what I've learnt so far, but there's something I'm stuck on. I've been learning how to use function parameters, so to get a bit of practise I decided to try to make a button that will make a p...
The Information Lab
theinformationlab.co.uk › home › how to – tableau javascript api for dummies. vol 3: triggering automatic alerts.
How To – Tableau Javascript API for Dummies. Vol 3: Triggering automatic alerts. - The Information Lab
July 8, 2019 - Tableau JS API allows us to get data driven alerts. Find out how here.