The rendered Markdown document will appear here.
What Cleaver Does · Private by design · Simple by default
Send sensitive files with confidence.
Cleaver encrypts files locally in your browser. Nothing is uploaded. You get a secure lock file and one portable key bundle—everything you need for a private handoff, without an account or cloud storage.
The process
From file to secure handoff.
- Choose a file. Cleaver reads it in the browser and never needs an upload endpoint.
- Enter a numeric PIN. The PIN selects and combines random key records inside the bundle to derive the AES key.
-
Download every output.
Keep the
.lockfile and its.bundlefile. - Decrypt later. Provide the lock file, the same PIN, and its key bundle to recover the original file.
What To Keep
Store the encrypted .lock file separately from its key bundle. Anyone decrypting needs the lock file, the PIN, and that one bundle.
What Cleaver Cannot Do
Cleaver cannot recover a lost PIN, missing key bundle, corrupted lock file, or overwritten download. Treat the generated files as the only recovery material.
Deployment Shape
The Go binary embeds the files in public/ and serves them over HTTP. Build once, copy the binary, and run it with the address you want to expose.
Encrypt File
Choose any file and set a numeric PIN. Cleaver creates the encryption key randomly in your browser.
Downloads
Select a file and encrypt it. Your lock file and key bundle will appear here.
Cleaver cannot recover a lost PIN or missing key bundle.
Decrypt File
Select a Cleaver lock file and its key bundle together, then provide the PIN created during encryption.
Result
Your decrypted file will appear here after a successful decrypt.
Edit Lock File
Unlock a text file in your browser. Paged Markdown files can be edited one page at a time, then exported with the same PIN and key bundle.
Render Markdown Lock File
Unlock a Markdown file stored in a Cleaver lock, then render it as a document with Goldmark.
Rendered document
Rendering sends the unlocked Markdown to this Cleaver server. It is processed in memory and is not stored.
Markdown Document Format
Format Markdown lock files as titled pages containing copyable dashed list items.
Page markers
Every page, including the first, begins with a line of at least three equals signs, a title on its own line, and another equals-sign line.
===
FIRST PAGE
===
# Header
- First copyable item
- Second copyable item
==========
SECOND PAGE
==========
# Another Header
- Another copyable itemThe opening and closing marker lengths do not need to match. A line containing three or more equals signs is reserved for page markers and should not appear in page content.
Headings and copyable items
Use # for section headings. Put every value that should be independently copyable on a separate - list line. The spaces after # and - are required.
# Account Details
- Plain text
- **Important text**
- [A link](https://example.com)
- Run `example-command --option`Rendered navigation
Page titles become page tabs. Each page also gets its own navigation for its # headings, and every rendered list item gets a Copy button.
Editing and alphabetizing
The editor presents one tab per page and allows its title and Markdown body to be edited independently. Alphabetizing sorts # sections within each page without mixing sections between pages.
Alphabetize Markdown Sections
Unlock a paged Markdown lock file, sort the # heading sections within each page, and export a new lock file using the same PIN and key bundle.
Alphabetized lock file
The alphabetized Markdown will remain encrypted and appear here as a new lock file.
Section content stays attached to its heading. The original lock file is not changed.