Similar logic applies to PHP ( header('Content-Disposition: inline') ) or Python Flask ( as_attachment=False ). 2. Client-Side JavaScript Solutions
Ensure your tags do not have the download attribute, as this explicitly forces a download regardless of server headers. 3. Embedding the PDF
For complete control—such as disabling the "Save" button or ensuring a consistent experience across all users—use a library like . This renders the PDF using HTML5 canvas or SVG elements, completely bypassing the browser's native (and often unpredictable) PDF handling. Why does it still download? Even with correct code, a PDF might still download if: open pdf in browser instead of download javascript
Use code with caution.
For dynamically generated or fetched PDFs, you can create a temporary Blob URL and open that in a new tab. javascript Why does it still download
To open a PDF in a browser instead of downloading it using JavaScript, the most effective method is to ensure your server sends the correct —specifically Content-Type: application/pdf and Content-Disposition: inline . While client-side JavaScript can manipulate how a file is handled, the browser's decision to display or download is primarily governed by these server-sent instructions. 1. Server-Side: Setting the Right Headers
fetch(pdfUrl) .then(res => res.blob()) .then(blob => { const fileURL = URL.createObjectURL(blob); window.open(fileURL, '_blank'); }); Use code with caution. open pdf in browser instead of download javascript
To ensure the PDF stays within your website's UI, use an , , or tag.