File & Archive Utilities
25 tools available. All calculations and file processing stay 100% private in your browser.
Convert 7
- Add Date Stamp to Filenames (YYYY-MM-DD)Add an ISO date stamp (YYYY-MM-DD) to the front or back of multiple filenames.
- Add Prefix to FilenamesPrepend a custom prefix string to the beginning of multiple filenames in bulk.
- Add Sequential Numbers to FilenamesAdd zero-padded sequential numbers (001, 002, etc.) to filenames to guarantee proper sorting order.
- Add Suffix to FilenamesAppend a custom suffix string to the end of filenames before the file extension.
- Convert Filenames to LowercaseConvert all uppercase letters in filenames to lowercase with optional extension inclusion.
- Convert Filenames to UppercaseConvert filenames to uppercase letters for archival or legacy mainframe naming standards.
Create 2
Organize & Edit 3
- Batch Rename Files (Find and Replace)Search and replace specific text patterns across multiple filenames simultaneously.
- Replace Spaces with Hyphens in FilenamesConvert all spaces in filenames into hyphens (-) for web and Linux CLI compatibility.
- Replace Spaces with Underscores in FilenamesConvert all spaces in filenames into underscores (_) for programming and script compatibility.
Inspect & Extract 13
- Check File Extension & Base NameSeparate filenames into their base name (stem) and extension parts across batch files.
- Check File Last Modified TimestampRead local file modification dates and display formatted timestamps in local time and UTC ISO 8601.
- Check File Size (Bytes, KB, MB, GB)Inspect exact file byte sizes and human-readable units (KB, MB, GB) across single or batch files.
- Check MIME Type (Signature Verification)Detect true MIME types using magic byte signatures and compare with browser-reported types.
- Create ZIP Archive (Compress Multiple Files)Bundle and compress multiple files into a single standard ZIP archive client-side.
- Detect Extension and MIME MismatchesVerify if file extensions match their true internal binary format to detect disguised or corrupted files.