File Encryptor
Encrypt any file with AES-256 and a passphrase, then decrypt it later.
Input
Settings
Run
Results
Results will appear here once you run the tool.
About File Encryptor
Encrypt any file with AES-256 and a passphrase, then decrypt it later. Drop a file into File Encryptor or click to browse, then choose your settings.
Your files stay on your device. ZyncTools has no upload step: the file is read in your browser, processed there, and handed straight back to you. There is no account, no watermark and no size cap beyond what your own device can hold.
Settings. File Encryptor gives you control over action and passphrase.
Also known as: encrypt, decrypt, file, aes, secure, password.
How to use File Encryptor
- Add your input. Drop your file onto the upload area, or click it to browse. The file is read in your browser and never uploaded.
- Choose your settings. Adjust action, passphrase to suit what you need.
- Run the tool. Press Run. Processing happens on your own device, so the time it takes depends on your machine rather than a queue.
- Save the result. Copy the output, or press Download to save it. Nothing is kept once you close the tab.
Frequently asked questions
Are my files uploaded when I use File Encryptor?
No. File Encryptor runs entirely inside your browser. Your file is read locally, processed on your own device, and handed straight back to you. You can confirm this yourself: open your browser's developer tools, watch the Network tab, and run the tool — no request carries your data anywhere.
Is File Encryptor free?
Yes, completely. No account, no sign-up, no watermark on your output, and no cap on how many times you can use it. The project is open source under the AGPL licence.
Is there a file size limit?
There is no server limit, because nothing is uploaded. The practical ceiling is your device's memory — on a modern laptop, files up to a few hundred megabytes are comfortable, while phones handle less. If a tab becomes unresponsive, the file was too large for the memory available.
Does File Encryptor work offline?
Mostly. The site caches itself after your first visit, so it keeps working without a connection. Tools that need a specialised library — PDF editing, OCR, QR codes, MP3 encoding — need a connection the first time you run them, then that library is cached too.