HTTP 415 Unsupported Media Type — What It Means & How to Fix It

What Does This Error Mean?

A 415 Unsupported Media Type error means you tried to upload or send a file type that the website does not support. The server received your file but looked at what type it is and said: 'We do not accept this format.' This could be uploading a .BMP image when only .JPG or .PNG is accepted, or sending a .PAGES document when only .PDF or .DOCX is allowed. The fix is usually simple — convert your file to an accepted format.

Affected Models

All web browsers
File upload websites
Online forms
Document submission portals

Common Causes

You uploaded a file in a format the website does not support
The file extension was changed manually but the file format is still unsupported
You are uploading a document in a Mac-only format that Windows-based servers reject
A browser extension changed the declared file type in a way the server rejects
The website only accepts specific file formats for security or compatibility reasons

How to Fix It

Check what file types the website accepts. Look for instructions near the upload button or on the help page.

Most upload forms list accepted formats like 'JPG, PNG, PDF only'.
Convert your file to an accepted format. For documents, save as PDF. For images, save as JPG or PNG.

Most programs let you 'Save As' or 'Export' in a different format.
If you have an image, use a free online converter like convertio.co to change the file format quickly.

Converting an image takes under a minute online.
For Mac users with .PAGES or .NUMBERS files: in the app, go to File > Export To > PDF or Word format.

Mac-only file formats are often not accepted by websites built for general use.
Make sure the file extension matches the actual format. Renaming a file from .TIFF to .JPG does not change the format — it must be properly converted.

A file's real type is what matters, not just the extension at the end of the name.

When to Call a Professional

If you cannot convert your file and the website needs to accept it, contact the website's support team. They can advise on accepted formats or alternative submission methods. Website owners should ensure their accepted file type list is clearly communicated to users.

Frequently Asked Questions

Why does a website restrict file types?

Websites limit file types for security and compatibility. Some file types can contain malicious code. Others are simply not usable by the website's system. Accepting only specific formats keeps the site safe and functional.

I converted my file but still get the error — why?

Make sure you actually exported the file to the new format, not just renamed it. Also double-check that the conversion worked — some converters produce broken files. Try opening the converted file first to confirm it looks correct.

Can I convert a PDF to an accepted image format?

Yes — tools like Adobe Acrobat, Smallpdf.com, or even free online converters can convert PDF pages to JPG or PNG images. This is sometimes needed when uploading identification documents or similar materials.