INVALID UPLOAD FILENAME

Invalid File Name for Upload?

An “invalid file name” message can refer to a destination-specific character, length, path, or naming policy. Check the exact filename first and separate verified blocked characters from patterns that are only worth reviewing.

There is no single blocked-character list for every upload destination

Use only the characters the destination explicitly rejects as exact rules. ARADURU can separately flag risky patterns such as path separators or trailing dots without calling them universal failures.

Check the exact filename 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. Open → 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. Start here ↓ Every file fails Review destination, account, browser, network, or service causes. Open →

The filename stays in this browser and is not added to ARADURU analytics. Enter blocked characters only when you have actual destination evidence.

No file required Enter the filename only Browser-local text Raw filename stays on this page Exact rules first Unknown naming rules stay unknown

CHECK THE FILENAME

Check the exact filename that failed

Enter the filename only and add exact destination naming rules only when you can verify them. The raw filename is not added to ARADURU analytics.

STEP 1

Check the exact filename that failed

Enter the name only, then add destination rules only when you can verify them.

Where are you uploading?

Verified profiles are used only when they contain a filename rule backed by the profile evidence. Otherwise ARADURU leaves the exact filename rule unknown.

Exact filename

Enter the filename only—not a full local path. The value is analyzed on this page and is not included in ARADURU analytics.

Exact maximum filename length optional Use the number shown by the destination. Leave blank if you do not know it.

Characters the destination says are not allowed optional Enter only characters you have actual destination evidence for. Spaces and commas are treated as separators.

WHAT YOU WILL GET A clear filename state, not a vague score

Rule conflictKnown exact rule is violated ReviewRisky pattern worth checking Known rules passEntered exact rules passed No obvious issueNo issue from available rules

CHECK MORE THAN THE NAME

If the filename looks fine, check the actual file next

Upload failures can still come from file size, real format, structure, account rules, network conditions, or destination-side security checks.

Open Upload Check Interpret an upload error

READ THE NAMING EVIDENCE

What does the filename problem actually show?

The destination says “invalid filename”

Look for a documented character, length, or naming rule before changing multiple parts of the name.

The filename contains separators or symbols

Treat local pattern warnings as review signals unless the destination explicitly blocks those characters.

Renaming once did not help

Stop blind renaming and check whether size, type, structure, permission, or transport is the real blocker.

WHAT ARADURU CHECKS

A practical order before you retry

Compare only entered or verified blocked-character rules as exact failures.
Count filename length and UTF-8 bytes separately.
Keep advisory filename patterns visually separate from verified destination rules.
If no exact filename rule fails, continue to the actual upload conditions instead of renaming repeatedly.

AFTER THE CHECK

Change the name only when the evidence points to the name

A filename can look unusual and still be accepted. Exact destination evidence should decide whether a rename is required; otherwise preserve the original name and continue troubleshooting the upload.