FILE FORMAT TROUBLESHOOTING

Invalid File Format? Check What the File Actually Contains

A broad invalid-format message can describe a mislabeled file, unsupported type, damaged structure, or destination rule. Start with the actual file so those possibilities stay separate.

A format error can mean mismatch, damage, or an unsupported destination rule

ARADURU checks the detected format, filename extension, and supported file structure locally in your browser. A healthy file-side result can also tell you when to stop changing the file and investigate the destination instead.

Check the real file format See what to check first
CHOOSE THE EVIDENCE YOU HAVE Start from the signal that is already in front of you

Do not change the original file just to test a guess. Pick the closest situation and move to the matching ARADURU check.

One file fails Check the actual file before changing it. Start here ↓ I have the exact error Start from the destination wording you can see. Open → The filename is rejected Check the exact name against verified rules. Open → Every file fails Review destination, account, browser, network, or service causes. Open →

Do not convert the original just to clear a generic error. Preserve it until the result shows whether the problem is format mismatch, file structure, or destination policy.

No upload File stays in your browser No account Start immediately Evidence first Avoid blind file changes
CHECK THE FILE

Use the file that actually failed

Start with the same file so the result reflects the real failure, not a substitute file.

STEP 1

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.

USER-PROVIDED Global

ARADURU does not guess upload limits. Enter the exact requirements shown by the destination site or upload form.

Allowed file types
Any file type is allowed unless the destination site says otherwise.
STEP 2

Choose the file

ARADURU reads the selected file locally and reruns the check when you change the requirements above.

Drop your file here or click to choose a file Any file type can be selected. Internal-format detection is available for common formats.
IDENTIFY THE FAILURE

What happened when you tried to upload?

“Invalid file format”

First identify what the selected file actually is instead of trusting its name.

The extension looks normal

The content may still be another format or the file structure may be incomplete.

The destination rejects a healthy file

That can indicate an allowed-type rule or another destination-side condition rather than corruption.

WHAT ARADURU CHECKS

A practical order before you retry

  1. Detect the actual file family from content where the format is supported.

  2. Compare the real format with the filename extension.

  3. Inspect supported structure for concrete file-side blockers.

  4. Keep destination policy separate when the file itself looks structurally healthy.

AFTER THE CHECK

An invalid-format message is a starting point, not a diagnosis

A mismatch may call for a corrected name, a destination rule may call for a real conversion, and structural damage may call for recovery. Use the file evidence to choose the next step rather than applying all three.

If the generic check points to the file itself, continue with the matching File Doctor for deeper structure evidence.

Run the full File Check →
RELATED UPLOAD PROBLEMS

Continue from the evidence you actually have

Open the full Upload Check → Invalid File Extension? Check the Real File Format → View all upload problems →