Use our file format checker online tool to instantly identify the exact type of any file. Simply upload your file, click “Check File Format,” and the tool automatically displays complete file details in seconds.
📂 File Format Checker
How to Check File Format Online
- Upload any file using the upload button.
- Click “Check File Format.”
- The tool reads metadata from the file using JavaScript’s
FileAPI. - It then displays key details:
- File Name
- File Type (MIME)
- Extension
- Size (in KB)
- Last Modified Date
No data is uploaded to any server. Everything runs locally in your browser, ensuring full privacy.
Why Use the Online File Format Checker?
- Verify file authenticity: Confirm if a file extension matches its MIME type.
- Avoid fake or malicious files: Spot mismatched file names and types.
- Simplify troubleshooting: Quickly detect corrupted or wrongly named files.
- Speed up workflow: No need to open apps — just check details instantly.
- 100% secure: Runs locally, no uploads or cloud processing.
What File Details Can You Check?
Once you upload a file, the checker shows:
- File Name: The exact name of your uploaded document.
- File Type (MIME): The system-level identifier, e.g.,
image/png,application/pdf. - File Extension: The suffix, like
.jpg,.docx,.zip. - File Size: Shown in kilobytes (KB).
- Last Modified: The date and time of the file’s most recent edit.
This information helps confirm whether your file is the correct version or safely formatted for sharing or submission.
FAQs
1. What is the purpose of a file format checker?
It helps you verify the true type and details of any file, ensuring its extension and content match correctly. This prevents file format errors and enhances digital security.
2. Can I check image, video, or audio files?
Yes! You can check any file type — including .jpg, .png, .mp3, .mp4, .pdf, .docx, .zip, and many more.
3. Is my data safe when using this tool?
Absolutely. The checker is 100% local, meaning no files are uploaded or stored. It runs entirely in your browser using client-side JavaScript.
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Conclusion
The File Format Checker Tool makes it effortless to identify any file type, confirm extensions, and understand key details without risking your privacy.
Whether you’re a developer, student, or everyday user, this tool gives you instant clarity — directly in your browser.
