MicroBin provides configurable, self-hosted paste and file sharing, along with URL shortening features.
Open source
9 alternativescryptgeon
cryptgeon lets users share notes and files through an open-source service built with Rust and Svelte.
About cryptgeon
cryptgeon is an open-source note and file sharing service inspired by PrivNote, built with Rust and Svelte. It includes a server, a web page, and a CLI client, with a demo at cryptgeon.org.
Notes are encrypted client-side with XChaCha20-Poly1305 before upload, stored in memory without disk persistence, and can have view-count or time limits. Operators can self-host it with Docker and a Redis or Valkey cache, and HTTPS is required for browser cryptographic functions.
Key features
- Share text notes or files via web page
- Create notes from command line via CLI client
- Encrypt notes client-side with XChaCha20-Poly1305
- Limit access by view count or expiration time
- Self-host with Docker using Redis or Valkey cache
- Send notes through official Raycast extension
Best for: People who want to self-host a PrivNote-style service for sending notes and files with expiration limits.
Good for
- Open source with server, web interface and CLI client
- Client-side encryption means server stores only encrypted data without the key
- Data is held in memory and not persisted to disk
Watch out for
- View counts are only guaranteed with a single instance; shared-cache setups can allow extra retrievals
- Requires HTTPS, otherwise browsers will not support the cryptographic functions
- Notes kept in memory can be evicted and are not persisted
cryptgeon at a glance
- Category
- Online Tools › Pastebins
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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cryptgeon FAQ
How does cryptgeon handle encryption?
Each note has a 256-bit id for retrieval and a 256-bit key. The client encrypts the note with XChaCha20-Poly1305 before sending it, and the server never receives the key.
How can I self-host cryptgeon?
Docker is the documented method, using a Valkey or Redis cache. HTTPS is required for the browser cryptography to work, and a health endpoint is available at /healthz.
Are view limits exact?
View counts are guaranteed with one running instance. Multiple instances connected to the same cache can have race conditions where a note is retrieved more times than allowed.
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