Image Format Detector
Free online tool to detect image file format. Analyze file signatures to identify real format.
About Image Format Detector
Image Format Detector is a diagnostic tool that helps you identify the actual file type of an image. Sometimes a file might have a wrong extension (e.g., a PNG image saved as .jpg). This tool analyzes the file header (magic numbers) to tell you exactly what format it is.
How to Use?
- Upload the file you want to inspect.
- The tool scans the file's binary data.
- It displays the detected MIME type (e.g., image/png, image/jpeg) and the true extension.
Features
- Magic Number Analysis: Inspects file signatures for accurate detection.
- MIME Type Identification: Shows the standard internet media type.
- Extension Verification: Helps check if a file extension matches its content.
- Client-Side: Secure analysis without uploading files to a server.
FAQ
Why do I need to detect image format?
If you can't open an image, it might be corrupted or have the wrong extension. Knowing the true format allows you to rename it correctly or use the right viewer.
What are Magic Numbers?
Magic numbers are the first few bytes of a file that uniquely identify its format. For example, PNG files always start with a specific sequence of bytes.
Does this tool repair broken images?
No, it only identifies the format. If the file data itself is corrupted, this tool cannot fix it.