ChatGPT knows more about you than you think.
Take it back — with Jak.

Paste one prompt into ChatGPT. Extract everything it knows about you. Then bring it all to JakGPT — free on your own computer.

Jak Your ChatGPT — Free →

900 million people use ChatGPT

The AI that knows you isn't yours.

You've told ChatGPT everything — your work, your worries, your wins. Every word lives on OpenAI's servers. Their policies, their pricing, their model can change tomorrow. The AI you've spent months teaching to understand you is built on borrowed ground.

What if you could extract your personality — and take it anywhere?

What is a .jak file?

A small JSON document that contains everything an AI needs to understand you: your identity, personality, communication style, expertise, projects, and more.

Think of it as your portable AI persona — instead of spending weeks teaching each new AI how you think, just load your .jak file and it knows you instantly.

Human-readable. Editable. Yours.

profile.jak 
{
  "jak_version": "2.0",
  "identity": {
    "display_name": "Your Name",
    "roles": ["Developer", "Designer"],
    "one_liner": "Building things that matter"
  },
  "personality": {
    "thinking_style": "Systems thinker, first principles",
    "core_values": ["Craftsmanship", "Honesty"]
  },
  "communication": {
    "style": "Direct and conversational",
    "tone": "Casual but substantive"
  },
  "expertise": ["Python", "AI/ML", "Design"],
  ...
}

Inside a .jak file

13 categories. Include what's relevant. Skip what isn't.

  • Identity — Name, location, roles, languages, bio
  • Personality — Traits, thinking style, motivations, values
  • Working Style — How you work, strengths, productivity patterns
  • Communication — Preferred tone, style, what you appreciate and avoid
  • Expertise — Skills and knowledge areas with proficiency levels
  • Current Focus — Active projects, priorities, long-term goals
  • Relationships — Key people, social style, collaboration patterns
  • Emotional Life — What grounds you, stressors, what brings fulfillment
  • Health & Lifestyle — Travel, diet, sleep patterns, preferences
  • Technology — Devices, languages, tools, infrastructure interests
  • Financial — Business context, revenue models, priorities
  • Memories — Important facts, people, and places
  • Gaps — Areas the AI should ask about to learn more

Open standard, MIT licensed. Read the full .jak spec →

Your .jak file vs ChatGPT Memory

What you actually get when you bring your context to a file you own.

.jak file ChatGPT Memory Claude Projects
You own the data Yes No No
Portable between AIs Yes No No
Human readable Yes No Partial
Works offline Yes No No
Edit it directly Yes Limited Yes
Survives company shutdown Yes No No

How it works

Four steps. Two minutes. Your own AI identity, ready to take anywhere.

Paste our prompt into ChatGPT

One prompt that asks ChatGPT to lay out everything it knows about you.

Copy and paste

Copy ChatGPT's reply — your full profile — and paste it into our extract tool.

Review and fill in the gaps

We flag what ChatGPT got wrong or missed. Fix it, add what matters — you're the author of your identity.

Download your .jak file

We turn it into a .jak file. Download it — yours to keep, edit, and take anywhere.

Jak Your ChatGPT — Free →

JakGPT — your AI, running on your hardware

Offline. Private. Nothing stored.

Search the web

Real-time results from 70+ sources. Your searches stay on your device.

Understand images

Upload screenshots, documents, photos. JakGPT analyzes them locally.

Generate images

Create AI art. Run locally (free) or use JakGPT Pro cloud.

Deep reasoning

JakGPT thinks through complex problems. You keep the insights.

Two ways to run JakGPT

Same .jak file. Choose where you want JakGPT to think — your machine, or our cloud.

Free forever

On your computer

  • Runs locally — no internet needed
  • Open source, fully transparent
  • Needs ~16GB RAM
  • Full model, most powerful
Download Jak — Free →
$9.99 / month

In the cloud

  • Use anywhere — phone, tablet, weak laptop
  • No hardware requirements
  • Half the price of ChatGPT
  • Your .jak file still lives on your device
Try Jak Pro →

Either way, your .jak file stays on your device. You own it.

FAQ

Is the .jak file really free?
Yes. Extract your .jak file from ChatGPT and download it — no signup, no card, no strings. It's yours. Use it with JakGPT, Claude, local models, or any AI that supports the format. We don't charge for the file.
Do I need ChatGPT to use JakGPT?
Right now, yes — we're focused on helping ChatGPT users extract their context. Support for more sources (Claude, Gemini, manual creation) is coming.
Can I try JakGPT in my browser first?
Yes. 10 free conversations in the browser — no signup, no card. Your .jak file stays on your device the whole time. If you like it, download the app to keep going free locally, or upgrade to Pro for the cloud.
What do I need to run JakGPT locally?
Around 16GB RAM, Mac/Windows/Linux. Once installed, JakGPT runs offline — no internet needed, no conversations stored. Full specs →
What if I can't run it locally — phone, weak laptop?
Use JakGPT Pro in the cloud — same AI, accessible from any device, including mobile. $9.99/month, half the price of ChatGPT. Your .jak file still stays on your device.
What happens to my data if I use JakGPT Pro?
Your conversation goes to our servers to generate a response, then it's gone. We don't store prompts, responses, or any conversation data. Your .jak file never leaves your device.
Can I move my .jak file between devices?
Yes. Your .jak file is just a file — copy it to another computer, phone, or USB stick. Back it up to your own cloud if you want. Yours to move, share, or archive however you like.
Made by humans, not a megacorp

Who built Jak

Jak is built by Dragonfire Technology, a small team based in the UK. We're developers, not executives. We fund development through cloud subscriptions and the DragonCloud mesh network — not venture capital, not data sales, not advertising.

We believe AI should be a tool you own, not a service that owns you. The .jak format is our contribution to making that possible.

The format is open. The app is open source. We want this to become a standard that works everywhere — not just with our tools.

Visit Dragonfire →

Jak your ChatGPT. Make it yours.

Jak Your ChatGPT — Free →