OneTimeSecret creates self-destructing links for sharing passwords and other sensitive information; the page also describes self-hosting.
Portable Secret
Portable Secret creates self-contained HTML files that decrypt messages or files locally in a browser using a password.
About Portable Secret
Portable Secret creates a single HTML file that holds encrypted text and files. The file unlocks when the recipient enters the password. The homepage states that the decryption code is included in the file and runs in the browser using the Web Crypto APIs, and that the file can be opened offline. The homepage also states that entering the password does not upload anything, although it does not describe how the file is created.
The site states that the payload is encrypted with AES-GCM, with the key derived from the password using either Argon2id or PBKDF2. Contents can include notes, images, documents, archives, and other files, which can be viewed or downloaded after decryption. The homepage says that if the password is lost, the data cannot be recovered, and there is no reset or master key. Saving decrypted files depends on the device's file handling.
Key features
- Creates a self-contained HTML file that unlocks encrypted data with a password
- Bundles the encrypted payload with the decryption code in one file
- Uses the browser's Web Crypto APIs to decrypt data locally
- Encrypts the payload with AES-GCM; key derived with Argon2id or PBKDF2
- Holds text notes and multiple file attachments such as images and documents
- Lets the user view or download each item after decryption
Best for: People who need to share encrypted notes or files with a recipient who has only a web browser and the password.
Good for
- Decryption needs only a browser, with no special software, according to the homepage
- The site says the file's encryption method can be chosen between Argon2id and PBKDF2
- The homepage states that decryption happens in the browser and nothing is uploaded
Watch out for
- If the password is lost, the data cannot be recovered; there is no reset flow or master key
- Saving decrypted files depends on the device's file handling
- Pricing is not known from the source
Portable Secret at a glance
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
Portable Secret alternatives
Tools and sites you could use instead, ranked by how closely they match.
Burn My Note creates encrypted notes that self-destruct after reading, with optional password protection and configurable expiration times.
Hemmelig lets users share encrypted messages that automatically self-destruct after being read, according to its site description.
Yopass encrypts secrets in the browser and creates one-time links that expire, providing a way to share sensitive information without accounts.
BURN.link is presented as a service for sending secure messages that disappear after they are read.
Share encrypted notes and files that self-destruct with s.cr, without creating an account.
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Portable Secret FAQ
What happens if I forget the password?
The homepage states that the data is unrecoverable. There is no Forgot Password flow or master key, so the encryption cannot be reversed if the password is lost.
What kinds of data can be inside?
The homepage says a Portable Secret can include text plus multiple file attachments, such as notes, images, documents, and archives.
Can the file be stored on cloud drives or a USB stick?
The homepage says this is possible if the password is strong. It states that the payload is encrypted at rest and is of no use to someone without the password.
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