About Restructure.dev

What is Restructure.dev?

Restructure.dev is a powerful tool designed to help you bypass email size limitations and file type restrictions. It works by intelligently splitting large files into smaller, encrypted pieces and packaging them as standard email text file attachments.

Key Features

  • Split large files into manageable chunks
  • Secure encryption for all file parts
  • Client-side processing for maximum privacy
  • Works with any email provider
  • No file type restrictions
  • No server storage of your files

Perfect For

  • Large attachments exceeding email limits
  • Sending restricted file types
  • Secure file transfers
  • Bypassing email filters
  • Corporate email restrictions
  • Cross-platform file sharing

Split

Upload your file, set a password, and choose between EML or ZIP format for the split files.

Share

Send the EML files via email, or share the ZIP archive through any file sharing method.

Rebuild

Upload the EML file, ZIP archive, or individual split files, enter your password, and reconstruct the original file.

Why Choose Restructure.dev?

Unlike traditional file sharing services, Restructure.dev processes everything in your browser. Your files are never uploaded to our servers, ensuring maximum privacy and security. The tool creates standard EML files that work with any email client, making it a universal solution for bypassing file size limits and type restrictions.

Learn more about our security

Split Attachment

Drop file here or click to upload
(Max 500MB)

5 MB 17 MB 500 MB

Choose EML for email transmission or ZIP for direct file sharing

Rebuild Attachment

Drop EML/ZIP file or chunk files here
or click to upload
(Max 1GB)

Accepts: EML file, ZIP archive, or all chunk files (.txt)

File Format Guide

EML files and ZIP archives are standard formats that make it easy to handle your restructured files. This guide will help you work with both formats when using Restructure.dev.

Understanding File Formats

EML Files (.eml)

Standard email message files that can be imported into and exported from most email clients. Perfect for bypassing email restrictions.

ZIP Archives (.zip)

Compressed archives containing all split files. Ideal for direct file sharing or when email transmission isn't needed.

Sending Files

Using EML Files (Recommended)

  1. Double-click the generated EML file
  2. It will open as a new email in your default email client
  3. The split files are already included as attachments
  4. Add recipients and send the email

Works with Outlook, Apple Mail, Thunderbird, and other email clients

Manual Method

  1. Create a new email in your email client
  2. Extract the split files from the ZIP archive
  3. Add all split files as attachments to your email
  4. Complete and send your email

Use this method if EML files don't work with your email client

Rebuilding Files

From EML Files

  1. Save the received EML file
  2. Upload it to the Rebuild section
  3. Enter your password
  4. Click Rebuild to restore the original file

From Split Files

  1. Save all received split files
  2. Select all files in the Rebuild section
  3. Or upload the ZIP archive if you have one
  4. Enter your password to reconstruct the file

Troubleshooting Tips

  • If your email client doesn't support directly opening .eml files, you can use free online viewers or converters.
  • Some file systems hide file extensions by default. Make sure the file has a .eml extension.
  • Large EML files might be blocked by your email provider. If so, consider splitting the file into smaller chunks.
  • If you receive an error when uploading to Restructure.dev, make sure you're using the original .eml file without modifications.

Security at Restructure.dev

At Restructure.dev, we've designed our service with flexibility and security in mind. You can choose between email-friendly EML files or convenient ZIP archives for sharing your restructured files.

EML Format

Perfect for email transmission. Creates standard email files that work with any email client, helping you bypass size and type restrictions.

ZIP Archive

Ideal for direct file sharing. Creates a compressed archive containing all split files, making it easy to share through any method.

Split

Upload your file, set a password, and choose between EML or ZIP format for the split files.

Share

Send the EML files via email, or share the ZIP archive through any file sharing method.

Rebuild

Upload the EML file, ZIP archive, or individual split files, enter your password, and reconstruct the original file.

Technical Security Details

Security Feature Implementation Benefit
Encryption Algorithm AES-256-CBC Military-grade encryption that's virtually impossible to break
Key Derivation Argon2 Password-based key generation resistant to brute force attacks
Initialization Vector Unique, chained IVs Prevents pattern analysis and ensures each chunk has unique encryption
Metadata Storage Minimal metadata only We store only what's necessary for reconstruction, not your file content
Password Handling Client-side SHA512 hashing Your password never leaves your device in its original form

Privacy Statement

Our Commitment to Privacy

At Restructure.dev, we take your privacy seriously. Our tool is designed with a "privacy-first" approach, ensuring that your data remains under your control at all times. We believe in transparency and want you to understand exactly how your data is handled when using our service.

How We Handle Your Data

  • All file processing occurs locally in your browser
  • Your files are never uploaded to our servers
  • We don't store any personal information
  • No cookies are used for tracking purposes
  • No data is shared with third parties

Technical Data Collection

We collect minimal technical data required for the service to function, such as:

  • Basic usage statistics to improve the service
  • Error logs to fix technical issues
  • Performance metrics to optimize the application

Your Rights

Since we don't store personal data, there's typically nothing to request or delete. However, if you have any concerns or questions about your privacy while using Restructure.dev, please don't hesitate to contact us.

Contact Information

For any privacy-related questions or concerns, you can reach us at:

We aim to respond to all privacy-related inquiries within 48 business hours.

Last updated: May 13, 2025

This privacy statement may be updated periodically to reflect changes in our practices or legal requirements.