One-time secret sharing alternatives
Eight different approaches to encrypted, expiring links — and the trade-offs behind them
Short answer: OncePad is a free, no-account service for sharing a password, secret, or file through an end-to-end encrypted link. The link contains no decryption key, works once, and expires after 24 hours. Files may be up to 25 MB.
There is no universal winner
These services overlap, but they do not solve exactly the same problem. Some optimize for a one-click link, some for self-hosting, some for password-manager workflows, and some for configurable paste or file sharing. OncePad optimizes for a narrow handoff: no sender account, a generated passphrase delivered separately, one reveal, and a fixed 24-hour ceiling.
The approaches at a glance
| Service | Encryption model | Key arrangement | Especially useful when |
|---|---|---|---|
| OncePad | End-to-end in the browser | Generated 7-word passphrase sent separately; no key in link | You want a fixed, no-account, one-read handoff |
| Onetime Secret | Server-side encryption documented | Service-managed encryption with optional passphrase | You want mature plans, regions, APIs, or self-hosting |
| Privnote | Encrypted notes; operator lacks the unique link | Decryption key is contained in the shared link | You value a single-click self-destructing note |
| Password Pusher | Server-side encryption for sensitive fields | Server master key with optional passphrase | You need configurable views, audit features, or self-hosting |
| Bitwarden Send | End-to-end in the client | Key in the URL fragment by default; it can be split manually | You already use Bitwarden or need larger file Sends |
| Yopass | End-to-end OpenPGP in the browser | Client-side key in the shared URL; optional custom password | You want an open-source, self-hosted service and CLI |
| PrivateBin | End-to-end AES-GCM in the browser | Key in the URL fragment; optional password | You want a configurable encrypted pastebin |
| SnapPwd | End-to-end in the browser | Key in the URL fragment by default; it can be sent separately | You want a one-click zero-knowledge link, configurable expiry, or self-hosting |
How to choose
- Choose OncePad when the link must be harmless without a separately delivered, generated passphrase.
- Choose SnapPwd when a single fragment-key link or a public/self-hosted stack matters more than a forced two-channel handoff.
- Choose Bitwarden Send when the sender already has a Bitwarden account and wants its configurable access controls or larger paid file limit.
- Choose Yopass or PrivateBin when running and reviewing the service yourself matters more than using a managed public endpoint.
- Choose Password Pusher when operational features such as multiple views, audit logs, accounts, or team administration matter.
- Choose Privnote when one-click delivery matters more than separating the link from the decryption credential.
- Choose Onetime Secret when you want a long-established service with broader plans, regions, and integrations.
What every comparison checks
The dedicated pages compare where encryption happens, where the key lives, file support, expiry and view controls, account requirements, source availability, and the cases where the other service is genuinely a better choice. Those details matter more than a generic “secure” label.
Last verified: August 19, 2026. The matrix is based on the primary documentation linked from each dedicated comparison. Product names are trademarks of their respective owners; none of the listed services is affiliated with or endorses OncePad.