Batch File Type Detection

Tool Introduction

This tool is an efficient and convenient online batch file type detection tool that can quickly and accurately identify the true type and format of various files. It does not rely on file extensions, but rather provides reliable file type identification results by deeply analyzing internal file features such as Magic Numbers. Whether you need to batch manage unknown files, categorize files, conduct security reviews, or use it as a pre-processing step before data analysis, this tool can significantly improve your work efficiency and data accuracy. It supports the detection of hundreds of common file types such as images, documents, compressed packages, videos, and audio, making it a powerful assistant for your file processing needs.

How to Use

1. Upload Files: You can upload one or more files by clicking the "Select File" button on the page, or by directly dragging them to the designated area. This tool supports batch uploads, allowing you to upload multiple different types of files for detection at once.
2. Start Detection: After the files are uploaded, click the "Start Detection" button on the page. The system will automatically perform in-depth analysis and type recognition for each uploaded file.
3. View Results: After detection is complete, the page will display detailed detection results for each file in a clear list or table format, including the original file name, the detected true file MIME type (e.g., image/jpeg, application/pdf), the recommended file extension (e.g., .jpg, .pdf), and a brief description of the file type.
4. Export Results (Optional): Some advanced features may support downloading the detection report as a CSV or Excel file, making it convenient for subsequent data organization and analysis.

Frequently Asked Questions

• Q: How does this tool primarily identify file types?
• A: This tool primarily identifies the true type of a file by analyzing its "Magic Number," file header information, and specific file structure, rather than solely relying on the file extension, thereby providing more accurate identification results.
• Q: Why do the extension of the file I uploaded and the detection result not match?
• A: This is the core value of this tool. File extensions can be arbitrarily modified, but the actual content of the file is key to determining its true type. This tool is precisely designed to correct such misleading information and reveal the true nature of the file to you. For example, if a file named image.txt contains a JPEG image, the tool will correctly identify it as image/jpeg.
• Q: What types of files are supported for detection?
• A: We support the identification of most common file types on the market, including but not limited to images (JPG, PNG, GIF, BMP, etc.), documents (PDF, DOCX, XLSX, PPTX, etc.), compressed packages (ZIP, RAR, 7Z, etc.), videos, audio, executable files, and hundreds of other formats. The supported types will continue to increase with technological updates.
• Q: Are there any limits on the number or size of files for batch detection?
• A: To ensure service stability and response speed, we may set certain limits on the number of files or the total file size for a single upload. Specific limits will be dynamically adjusted based on server load and resource conditions; please refer to the prompts on the page.
• Q: Will my files be uploaded to the server and stored? Is it secure?
• A: Files need to be uploaded to the server for file type analysis. However, we promise that your files will not be stored after analysis is complete, and SSL/TLS encryption measures will be taken during transmission to protect data security. We attach great importance to user privacy.

Notes

• Network Environment: File upload and detection require a certain amount of network bandwidth and time, especially for large files or batch files. Please ensure your network connection is stable and patiently wait for the processing results.
• Result Reference: Although this tool strives for accurate identification, file type identification is a complex process. In extreme cases (such as severely damaged, deeply encrypted, or unusually formatted files), identification deviations may occur, and the detection results are for reference only.
• File Size and Quantity: Avoid uploading excessively large or too many files at once, as this may lead to upload failures, detection timeouts, or slow service responses. It is recommended to process files in batches according to the page prompts to achieve the best user experience.
• Privacy and Security: Although we promise that your files will not be stored after analysis and that the transmission process is encrypted, if you are dealing with extremely sensitive or confidential files, please evaluate the risks of online tools yourself, or consider using offline file analysis tools.
• Malicious Files: This tool is primarily used for file type identification and does not have antivirus or security scanning functions. Please do not upload files from unknown sources or files that may contain malicious code, to avoid potential risks to your device or system.