Encrypt one file or entire batches
Files are encrypted locally in your browser, so the original data never leaves your device.
Free File Encryption
Encrypt Files Online Before You Upload or Share Them
Protect documents, PDFs, photos, videos, archives, and other files with strong browser-based encryption. Encrypti0n keeps your files on your device while encrypting them with AES-256-GCM, making it easy to share or store them securely.
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batch file encryption
Encrypt Files Online
Encrypt one file or entire batches - Optimised for both small and large files - Download processed files individually or as a ZIP archive
01
Files are encrypted locally in your browser, so the original data never leaves your device.
02
The app automatically detects whether selected files are already encrypted and chooses the correct action.
03
An adaptive memory system switches between in-memory processing and streaming mode for large files when supported by your browser.
Built for trust
Designed to keep things secure
Everything is designed to help you complete the task with as little friction as possible.
Optimised for both small and large files
The app automatically detects whether selected files are already encrypted and chooses the correct action.
Download processed files individually or as a ZIP archive
An adaptive memory system switches between in-memory processing and streaming mode for large files when supported by your browser.
Try it out
How file encryption works
Encrypti0n automatically adapts to your files and device, making secure file encryption simple for both everyday documents and large archives.
file workflow
$ selectChoose one or multiple files from your device.$ analyseThe app detects whether each file should be encrypted or decrypted.$ encryptFiles are processed locally using AES-256-GCM, with adaptive streaming for larger workloads when available.$ downloadSave encrypted files individually or download multiple results as a ZIP archive.What to expect
Helpful information before you begin
- Files are encrypted locally in your browser, so the original data never leaves your device.
- The app automatically detects whether selected files are already encrypted and chooses the correct action.
- An adaptive memory system switches between in-memory processing and streaming mode for large files when supported by your browser.
- When encrypting multiple files, processed results can be downloaded individually or combined into a convenient ZIP archive.
Good to know
Security and privacy notes
- Performance when encrypting very large files depends on your browser, available memory, and device capabilities.
- Anyone who needs to decrypt the files must have both the encrypted file and the correct password.
Best next step:
Encrypt Your Files and keep passwords unique, long, and stored safely.
Real-world use cases
Where Encrypt Files Online fits into everyday workflows
Security works best when it supports the task people are already trying to complete.
Protecting documents before sending them by email
Encrypt sensitive documents first, then send the encrypted file instead of the readable original.
Encrypting files before uploading them to cloud storage
Protect files locally before they reach cloud platforms, shared folders, or collaboration systems.
Securing backups on external drives
Protect archives and backups before placing them on removable drives, NAS devices, or long-term storage.
Safely sharing confidential business files
Send protected files to clients, partners, or colleagues while keeping the password separate.
Learn more
Why encrypt files before sharing them?
Cloud storage, email, USB drives, and messaging platforms make sharing files easy, but they are not designed to keep sensitive information private. Encrypting files before they leave your device ensures that only someone with the correct password can access the contents, even if the files are intercepted or stored on third-party services.
Related topics
Encrypt PDF Online, Private File Encryption, Online Encryption Tool
Official resources
FAQ
Questions people ask before using this
Almost any file type can be encrypted, including PDFs, Word documents, spreadsheets, ZIP archives, images, videos, and other binary files. Encrypti0n protects the file contents rather than relying on a specific format.
Yes. You can select multiple files in a single operation, making it easy to protect folders of documents or project files.
The app automatically estimates your browser's available memory. For larger workloads, it can switch to streaming mode where supported, reducing memory usage and improving stability.
Yes. Encrypted files are much safer to send than unencrypted attachments. For the best security, send the password through a different communication channel.
Yes. As long as you have the encrypted file and the correct password, you can decrypt it using Encrypti0n on another compatible device.
Yes. Encrypting files before uploading them helps ensure that cloud providers and anyone with access to your storage cannot read the original contents.
Encryption protects the contents of your files, but the original file names may still be visible. Avoid using sensitive information in file names when sharing or storing encrypted files.
Get started
Encrypt Your Files
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