OneTimeSecret deserves credit for defining the category: a dead-simple web page where you paste a secret and get a link that works once. It's open source, it's free, and for sending your aunt a Wi-Fi password it's exactly the right amount of tool.
For developers, though, the text box is where it ends. OneTimeSecret doesn't know what a .env file is — multi-line configs lose their shape, there's no syntax awareness, and every secret is an isolated paste with no memory. You're also pasting plaintext into a web form, trusting the server with it before it's encrypted at rest.
JustEnvs approaches sharing from the opposite direction: the secret already lives in an encrypted vault on your Mac, organized by project. Sharing is one click from there — the .env keeps its formatting, encryption happens locally before anything is uploaded (the server only ever stores ciphertext it can't read), and the link burns just like you'd expect. Store first, share second.
Web-based one-time secret sharing
Free; paid Identity plan (flat monthly) for custom domains
Native macOS vault for .env files — encrypted locally, shared via self-destructing links.
Free for solo devs (5 projects) · $20 one-time for Pro, lifetime
JustEnvs vs OneTimeSecret
Where OneTimeSecret wins
Zero install, zero commitment
A URL anyone can use from any OS in ten seconds. JustEnvs needs a Mac app to create shares (though not to open them).
Open source and self-hostable
You can run your own OneTimeSecret instance. JustEnvs's relay is operated for you, not by you.
Works for non-developers
Wi-Fi passwords, door codes, the occasional one-liner — for non-technical sharing, the simple text box is the right interface.
Where JustEnvs wins
A vault, not a text box
Your secrets are stored, organized by project, and searchable — sharing starts from where they already live, not from a blank paste.
True zero-knowledge
Encryption happens on your Mac before upload; the decryption key rides in the URL fragment that browsers never send to servers. With OneTimeSecret, the server sees your plaintext when you paste it.
Built for .env files
Share an entire config with formatting intact — key/value rows, not a wall of text the recipient has to un-mangle.
Finer burn controls
One view or five, 1 hour to 7 days — whichever hits first destroys the share atomically.