File metadata analyzer

This file metadata analyzer allows you to select one or more files and view detailed information about them directly in your browser. No files are uploaded to any server - all analysis happens locally on your device for complete privacy and security.

• Select files: Choose one or multiple files using the file picker or drag and drop them onto the designated area.
• View metadata: See comprehensive file information including name, size, type, last modified date, and other properties.
• Raw data: Access the raw file metadata as detected by the browser, useful for developers and technical analysis.

Common metadata fields

The analyzer displays various metadata fields depending on the file type and browser capabilities:

• File name: The original name of the file including extension
• File size: Size in bytes with formatted display (KB, MB, GB)
• File type: MIME type as detected by the browser
• Last modified: Timestamp when the file was last changed
• File extension: The file extension from the name

Privacy and security

Your privacy is paramount with this tool. All file analysis happens entirely within your browser using the File API. No files are ever transmitted to external servers or stored anywhere. The metadata is extracted locally and displayed only to you. Once you close the browser tab, all information is gone.

Use cases

This tool is helpful for various scenarios:

• Web development: Check how different file types are detected by browsers
• File management: Quickly review file properties without opening system file managers
• Debugging: Verify MIME types and other metadata for web applications
• Security analysis: Examine file properties before uploading to services
• Content management: Batch analyze multiple files for processing decisions

Browser compatibility

Modern browsers support the File API used by this tool. The metadata available may vary slightly between browsers as they detect file types differently. Some specialized metadata (like EXIF data for images) requires additional APIs and is not included in this basic analyzer.

Related tools

• Base64 encoder and decoder: Convert files to and from Base64 format for data URI usage.
• Color accessibility checker: Ensure your color choices meet accessibility standards.

Further reading

• MDN: File API
• MDN: FileReader API
• MDN: MIME types

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