Diarum
中文 Cloud Live demo
v0.9.9 Open source · Self-hosted · AI-native

One entry a day.Open, write, done.

Diarum is a diary built for writing a little every day. No titles, no folders, no decisions — open it and you are on today’s page, and everything you type is already saved. Your data stays on your own server.

Try the demo Diarum Cloud Deploy in 5 minutes GitHub

Demo account: demo / demo@1234

The Diarum diary editor The Diarum diary editor

A diary that is just right

Diarum does one thing: make writing and looking back every day effortless, for years.

One entry a day

Exactly one entry per day, indexed by its date. No titles, no folders — and ten years from now you can still find that day instantly.

Open and write

Sign in and you are on today’s entry. Auto-save, offline writing and an installable app — zero friction.

Privacy first, you own it

Self-hosted on your own server: one binary plus SQLite, and the data directory is everything. Open source, no third parties.

Backups & import/export

Export JSON + Markdown + original images in one archive, and back up to your own S3 on a schedule with one-click restore.

Designed to feel obvious

Polished on desktop and mobile: slash commands, outline, version history, On This Day and three visual styles.

Audited and accountable

Every API call is in the audit log, and every read of every entry is recorded — so you know nobody else has read it.

AI-native, agent-ready

A built-in RAG assistant on any OpenAI-compatible model, plus MCP and a REST API for Claude, n8n and friends.

Statistics

Total words, daily and yearly charts and your streak — watch a life’s worth of writing add up.

Three styles, equally easy to write in

A classic editor, an open book or retro Windows 95 — switch in Settings, in light or dark.

Classic Immersive Windows 95
AI-native

A diary your AI can read, too

From the built-in assistant to MCP, from the REST API to webhooks — Diarum is built for personal data in the AI era, and every read is audited.

Built-in assistant Entries are embedded automatically, so answers are grounded in what you wrote: daily reflections, weekly reports, year-end reviews. MCP server Connect Claude, Cursor, Cherry Studio and other agents with one config block — read-only, switchable, fully audited. REST API & webhooks A token-based read-only API with OpenAPI docs for n8n automations, plus Memos webhook sync for quick notes.
mcp.json 
{
  "mcpServers": {
    "diarum": {
      "type": "http",
      "url": "https://diary.example.com/api/v1/mcp",
      "headers": { "Authorization": "Bearer <token>" }
    }
  }
}
  • get_diary
  • list_diaries
  • search_diaries
Privacy & security

Your most private data deserves the strictest care

Self-hosting is only the start. Diarum lets you own your data — and prove nobody else has read it.

  • Runs on your own server or NAS; entries, images and AI settings live only in your data directory
  • The system audit log records every API call — but never diary content
  • Visitor statistics record every read of every entry, including refused and signed-out attempts
  • API and MCP are off by default, tokens can be reset any time, and access is strictly read-only
  • Exports are plain Markdown plus original images — no lock-in
  • Fully open source, with test coverage tracked in public
Read about audit & visitor statistics
Privacy & security

And more

Images Automatic thumbnails, Live Photos, HEIC; local, S3 or Chevereto. Sharing Share images in 5 themes, or copy as Markdown. Multi-user & admin One instance for the whole family, managed from an admin console. Version history Every save keeps the old version; preview and restore any time. Offline & PWA Write without a connection, sync later, install to your desktop. Full-text search Search every memory instantly, with highlighted matches.

All features

Docker

One command, your own diary in five minutes

A single binary with the frontend and SQLite built in — no external dependencies. Run it with Docker, Docker Compose or on bare metal.

The first account to register becomes the administrator.

Read the deployment guide
bash 
docker run -d --name diarum \
  -p 8090:8090 \
  -v ./data:/app/data \
  songtianlun/diarum:latest

Latest release

All releases →
v0.9.9 v0.9.9

From the blog

All posts →
Introducing Diarum: one entry a day, open and write Why another diary app, the ideas behind Diarum, and a complete tour of what it does today — writing, images, statistics, sharing, the AI assistant, MCP, backups, auditing and visitor statistics.

Start with today’s entry

Try the demo first, then deploy it on your own server when you are ready.

Try the demo Diarum Cloud Deploy in 5 minutes