Will this file upload?
Check a file against the size, file-type, and filename rules shown by the site you are uploading to. For supported formats, ARADURU also checks the file’s internal structure before you submit it.
Enter the upload requirements
Use the limits shown by the destination website or upload form. Leave a field blank when the site does not specify that rule.
ARADURU does not guess upload limits. Enter the exact requirements shown by the destination site or upload form.
Choose the file
ARADURU reads the selected file locally and reruns the check when you change the requirements above.
Checking upload readiness...
What ARADURU checked
ARADURU will explain whether the file can be fixed safely or needs a different source/export.
Technical details View checks
Common file-side reasons an upload gets rejected
Upload Check focuses on things that can be inspected before the file ever reaches the destination server.
File too large
Compare the selected file size with the maximum size shown by the upload form.
Disallowed extension
Check whether the filename extension appears in the allowed list you entered.
Format mismatch
For common formats, compare the filename extension with a signature or container found inside the file.
Filename too long
Check the filename against an optional maximum character count from the destination service.
Empty file
Detect a zero-byte file before you spend time retrying an upload that has no content.
Missing extension
Flag a filename with no extension because some upload forms rely on it when filtering files.
Browser-reported type
Show the browser-reported media type as a clue without treating a missing value as proof of a problem.
Your exact rules
Leave unspecified requirements blank instead of pretending ARADURU knows every site's private server rules.
The destination server still makes the final decision.
A site can reject an upload for rules ARADURU cannot see from your browser: account permissions, storage quotas, authentication, network failures, malware scanning, server-side MIME checks, processing errors, or requirements you did not enter here. Upload Check narrows down file-side causes; it does not guarantee acceptance.
The file check happens in your browser.
The standard Upload Check reads the selected file locally in your browser. It does not upload the selected file itself to the ARADURU server.
The current beta may load JavaScript libraries from third-party CDNs for certain format checks, but the selected file is not sent to those library servers by Upload Check.