Changes only digits before selected file type (.mp4, .mov, .pdf, .mp3)

File Number Navigator

Paste a URL, choose a file type, then use Page Back and Page Next to move through file numbers. Only the number before the selected extension is changed.

How It Works
Example: .../EFTA01648701.mp4 -> .../EFTA01648702.mp4. You can also target .mov, .pdf, or .mp3. Leading zeros are preserved automatically.
Detected target number will appear here.
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Keyboard shortcut: Left Arrow = Back, Right Arrow = Next.