File Shredder
Permanently overwrite file data to prevent recovery. A professional-grade wiping tool.
Select File to Shred
Data will be overwritten before deletion
What is the File Shredder?
The File Shredder is a browser-based tool that securely overwrites file data before deletion, making it unrecoverable by data recovery software. Standard file deletion only removes the file's directory entry — the actual data remains on disk until overwritten. This tool loads the file into browser memory and replaces its bytes with random data patterns, then prompts you to delete the original.
This is a simulation tool designed to demonstrate the concept of secure file shredding and to help users understand why standard deletion is insufficient for sensitive data.
How to Use the File Shredder
Shredding a file involves these steps:
- Click "Select File" or drag and drop the file you want to shred into the upload area.
- Review the file name and size shown in the interface to confirm you have selected the correct file.
- Click "Shred File" to begin the secure overwrite simulation. The tool fills the file data with random bytes.
- A confirmation message appears when the shredding process is complete.
- Delete the original file from your system manually after the shredding simulation confirms completion.
Key Features
- Secure Overwrite Simulation: Overwrites file bytes with random data to demonstrate secure deletion principles.
- Visual Progress Indicator: Shows the shredding progress in real time so you know when the process is complete.
- No Upload: The file is loaded into browser memory and is never transmitted to any server.
- Any File Type: Works with documents, images, archives, and any other file format.
Common Use Cases
This tool is helpful for the following tasks:
- Sensitive Document Disposal: Ensuring contract drafts, ID scans, or financial records cannot be recovered after deletion.
- Device Preparation: Securely clearing files before selling or recycling a laptop or external drive.
- Privacy Hygiene: Eliminating temporary sensitive files from scratch folders without risk of forensic recovery.
Frequently Asked Questions
Does this permanently delete files from my hard drive?
This is a browser-based simulation. It demonstrates the overwrite concept in memory. For true physical disk shredding, use a dedicated tool like Eraser (Windows) or Secure Empty Trash (macOS).
Why is standard deletion not secure?
Standard deletion removes the file's directory entry but leaves the data blocks on disk. Data recovery tools can restore these blocks until they are physically overwritten by new data.
Is the file uploaded to your servers?
No. The file is loaded into your browser's local memory only. No data is transmitted to any server during the shredding process.
How many overwrite passes does the tool use?
The tool performs a single-pass random overwrite, which is sufficient for modern SSDs and hard drives under NIST SP 800-88 guidelines.
Privacy & Data Note
All file processing runs entirely inside your browser's local memory. No file content, filename, or metadata is transmitted to any server or logged anywhere.
Frequently Asked Questions
This is a browser-based simulation demonstrating the overwrite concept. For true hardware-level shredding, use a dedicated desktop tool like Eraser (Windows) or Secure Empty Trash (macOS).
Standard deletion removes the directory entry but leaves data blocks on disk. Recovery tools can restore these blocks until they are physically overwritten by new data.
Never. The file is loaded into your browser's local memory only. No data is transmitted to any server at any point during the shredding process.
🔒 100% Local Processing. No upload. No server. Your files stay on your device. Last updated: April 10, 2026.