A file is too large to send, or the format isn't accepted
A website, form or email refuses your file because of its size or its format. Before changing anything, check the two facts that matter: how big the file actually is, and what format it really is.
Does this sound familiar?
- The website says my file is too big to upload
- My upload was rejected because of the file type
- My email will not attach the file
- They asked for a PDF but I only have a photo of the document
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Method for this problem
Check a file's size and format before you change anything
Before shrinking, converting or re-sending a file, find out two facts: how big it is, and what format it really is. This method shows where to read those facts on Android and on Windows, explains the common formats in plain words, and only then changes anything.
Source: Official documentationTesting: Not team-testedReports: none reviewed yet
Reviewed 9 Nov 2026
Applies to: Android phones (Android 11 and later); Windows 10/11 computers