Choosing the right tool to share secrets securely matters. Both PassLink and OneTimeSecret serve the same purpose — creating one-time, self-destructing links for sensitive data — but they differ in key areas like encryption, privacy, and features.
What is OneTimeSecret?
OneTimeSecret (onetimesecret.com) is one of the earliest services for sharing secrets via self-destructing links. It has been around since 2012 and offers a straightforward interface for creating temporary links. Secrets can be protected with a passphrase and set to expire after time or a single view.
What is PassLink?
PassLink (passlink.click) is a modern, open-source alternative that prioritizes client-side encryption and zero-knowledge security. It uses AES-128-GCM encryption directly in the browser, meaning the server never sees your unencrypted data.
Feature-by-Feature Comparison
Encryption
OneTimeSecret
OneTimeSecret encrypts data on the server side. This means your secret travels to their servers in a form they could technically read before encryption is applied.
PassLink
PassLink encrypts data in your browser using AES-128-GCM before it ever leaves your device. The encryption key is embedded in the URL fragment, which is never sent to the server.
Self-Destruct Options
OneTimeSecret
OneTimeSecret supports single-view destruction and time-based expiration up to 7 days.
PassLink
PassLink supports configurable view limits (1, 3, 5, or unlimited) plus time-based expiration (1 hour, 24 hours, or 7 days), giving you more flexibility.
Multi-Language Support
OneTimeSecret
OneTimeSecret supports English and a few community-contributed translations.
PassLink
PassLink supports 5 languages natively: English, Spanish, Portuguese, French, and Italian — with full translations for all pages.
Privacy & Open Source
OneTimeSecret
OneTimeSecret is open-source but uses server-side encryption, meaning the operator has theoretical access to secrets before they are encrypted.
PassLink
PassLink is open-source with true zero-knowledge architecture. The server only ever stores encrypted data it cannot decrypt.
Password Protection
Both tools support optional password protection. PassLink additionally hashes the password client-side before sending it.
Quick Comparison
| Feature | PassLink | OneTimeSecret |
|---|---|---|
| Encryption | ✅ Client-side (AES-128-GCM) | ⚠️ Server-side |
| Zero-knowledge | ✅ Yes | ❌ No |
| Account required | ❌ No | ⚠️ Optional |
| View limits | ✅ 1, 3, 5, or unlimited | ⚠️ Single view only |
| Password protection | ✅ Client-side hashed | ✅ Yes |
| Languages | ✅ 5 (EN, ES, PT, FR, IT) | ⚠️ EN + community |
| Open source | ✅ GitHub | ✅ GitHub |
| Price | ✅ Free, no limits | ⚠️ Free tier with paid plans |
When to Use OneTimeSecret
OneTimeSecret is a solid choice if you want a battle-tested, minimal tool that has been around for over a decade. Its simplicity is its strength.
When to Use PassLink
Choose PassLink if you prioritize client-side encryption, zero-knowledge security, multi-language support, or need flexible view limits. It is the better choice for teams and developers who care about where encryption happens.
Frequently Asked Questions
Is OneTimeSecret secure enough for passwords?
OneTimeSecret encrypts data at rest but does not use client-side zero-knowledge encryption. This means the server processes your plaintext momentarily. PassLink uses browser-side AES-128-GCM encryption, so the server never sees your unencrypted data.
Which is better for teams: PassLink or OneTimeSecret?
PassLink is better for teams sharing sensitive credentials. It offers multi-language support (5 languages), optional password protection, configurable expiration, and zero-knowledge encryption. OneTimeSecret has a simpler interface but fewer security features.
Can I migrate from OneTimeSecret to PassLink?
Yes. PassLink is a drop-in replacement. Just share your secrets using passlink.click instead of onetimesecret.com. The workflow is identical: paste your secret, get a link, share it. PassLink adds zero-knowledge encryption automatically.
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