File Extension Splitter
Batch separate and extract filenames and file extensions.
Tool Guide
About the Online File Name and Extension Splitter/Extractor
The online file name and extension splitter can batch-split a file list into two parts: the "file name body" and the "file extension", making it ideal for resource organizing, pre-batch-rename validation, file type statistics, and similar scenarios. It supports copying results and Excel export for further processing.
The tool automatically ignores query parameters after a file name; for example, abc.txt?v=1.0 is split based on abc.txt. Lines with no dot are automatically skipped, avoiding invalid-result clutter.
Key Features
- Batch splitting and extraction: split file names and extensions with one click, supporting multi-line input.
- Deduplication option: deduplicate by the "file name + extension" combination to reduce duplicate entries.
- Dual-result output: output the file name list and the extension list separately for independent use.
- Quick export: supports copying results and exporting to an Excel file.
## Tutorial
- Paste your file name list into the input box, ideally one per line.
- Choose whether to enable deduplication as needed.
- Click "Start Extracting", and the system automatically splits the file names and extensions.
- You can copy the "File Name List" and "Extension List" separately.
- To keep or further process the results, download the Excel directly.
## Use Cases
- Asset directory organizing: batch-count the distribution of file extensions.
- Development and ops: extract static-resource file names for inventory verification.
- Data cleaning: split standard file-name fields out of mixed text.
- Pre-batch-rename: split off the extensions first, then apply your renaming rules.
## FAQ
1. Does it support file links with parameters?
Yes. The tool first removes the parameters after the question mark, then performs the file name / extension split.
2. What rule is used for deduplication?
Deduplication is done by the "file name + extension" combination; only one copy of each fully identical entry is kept.
3. What happens to files with no extension?
Content with no dot separating an extension is automatically skipped and is not counted in the extraction results.
4. Can I copy just the extension list?
Yes. The tool provides a "Copy Extensions" button so you can copy the extension results separately.
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