Jan Data Folder

Jan stores your data locally in JSON format. Your data is yours alone.

Open Jan Data Folder

Via Jan:

Settings () > Advanced Settings
Click

Open Jan Data Folder

Via Terminal:


# Windows
cd %APPDATA%/Jan/data
# Mac
cd ~/Library/Application\ Support/Jan/data
# Linux
cd $XDG_CONFIG_HOME/Jan/data  # Custom install
cd ~/.config/Jan/data         # Default install

Directory Structure

Root directory: ~/jan


/assistants
  /jan
    assistant.json
/extensions
  extensions.json
  /@janhq
    /extension_A
     package.json
/logs
  /app.txt
/models
  /model_A
    model.yaml
  model_A.yaml
/settings
  settings.json
  /@janhq
    /extension_A_Settings
     settings.json
/themes
  /dark-dimmed
  /joi-dark
  /joi-light
  /night-blue
/threads
  /jan_thread_A
   messages.jsonl
   thread.json
  messages.jsonl

`assistants/`

Where AI personalities live. The default one (/assistants/jan/):


{
  "avatar": "",
  "id": "jan",
  "object": "assistant",
  "created_at": 1715132389207,
  "name": "Jan",
  "description": "A default assistant that can use all downloaded models",
  "model": "*",
  "instructions": ""
}

Parameters:

Parameter	Description	Type	Default
id	Assistant identifier	string	jan
avatar	Assistant image	string	None
object	OpenAI API compatibility marker	string	None
created_at	Creation timestamp	string	None
name	Display name	string	Jan
description	Role description	string	Default
model	Allowed models (* = all)	string	*
instructions	Default thread instructions	string	None
file_ids	OpenAI compatibility field	string	None
tools	Available tools (retrieval only currently)	array	retrieval
type	Tool type	string	retrieval
enabled	Tool status	boolean	true
useTimeWeightedRetriever	Time-weighted retrieval toggle	boolean	false
settings	Tool configuration	object	None
top_k	Max retrieval results	number	2
chunk_size	Text chunk size	number	1024
chunk_overlap	Chunk overlap amount	number	64
retrieval_template	Response format template	string	None

`extensions/`

Add-on central. Organization extensions live in @janhq/, solo ones in root.

`logs/`

Debugging headquarters (/logs/app.txt):

[APP]: Core logs
[SERVER]: API drama
[SPECS]: Hardware confessions

`models/`

The silicon brain collection. Each model has its own model.json.

Full parameters: here

`settings/`

Control panel. Extension settings in /settings/@janhq/:

Parameter	Description
key	Setting identifier
title	Display name
description	Setting explanation
controllerType	UI component type
controllerProps	Component properties
extensionName	Parent extension link

GPU settings (settings.json):

Parameter	Description
notify	Notification status
run_mode	Operating mode
nvidia_driver.exist	NVIDIA driver presence
nvidia_driver.version	Driver version
cuda.exist	CUDA availability
cuda.version	CUDA version
gpus[0].id	GPU identifier
gpus[0].vram	GPU memory (MB)
gpus[0].name	GPU model
gpus[0].arch	GPU architecture
gpu_highest_vram	Most capable GPU
gpus_in_use	Active GPUs
is_initial	First run flag
vulkan	Vulkan support

`themes/`

Visual wardrobe. Each theme's theme.json:

Parameter	Description
id	Theme identifier
displayName	UI name
reduceTransparent	Transparency control
nativeTheme	OS theme sync
variables	Component settings

`threads/`

Chat archive. Each thread (/threads/jan_unixstamp/) contains:

messages.jsonl:


    {
      "id":"01J6Y6FH8PFTHQB5PNJTHEN27C",
      "thread_id":"jan_1725437954",
      "type":"Thread",
      "role":"assistant",
      "content":
      [
        {
          "type": "text",
          "text": {
            "value": "Hello! Is there something I can help you with or would you like to chat?",
            "annotations": []
          }
        }
      ],
      "status": "ready",
      "created": 1725442802966,
      "updated": 1725442802966,
      "object": "thread.message"
    }

thread.json:

Parameter	Description
id	Thread identifier
object	OpenAI compatibility marker
title	Thread name
assistants	Assistant configuration clone
model	Active model settings
metadata	Additional thread data

Delete Jan Data

Uninstall guides: Mac, Windows, or Linux.

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