1. Export Everything from Replit

  1. Download your code
    In your Replit → three-dot menu → “Download as ZIP”

  2. Export ReplDB (if you use it)
    Open the Replit Shell and run:

    python -c "
import json
from replit import db
with open('db_export.json', 'w') as f:
    json.dump(dict(db.items()), f, indent=2)
"

    Then download db_export.json

  3. If you already use MongoDB Atlas, Supabase, etc. → just copy your connection string.

2. Install & Setup Google Antigravity

  • Download from antigravity.google (macOS, Windows, Linux)
  • Sign in with your personal Gmail (required for Gemini 3 Pro)
  • Open the downloaded Replit folder as a new Workspace

Antigravity is a desktop VS Code fork with powerful AI agents that can autonomously code, test, and deploy.

3. Let the AI Agent Migrate Your Code

In the Agent sidebar, type:

@workspace Adapt this Replit project to run locally and prepare it for Firebase deployment. Fix any Replit-specific paths or secrets.

The agent will:

  • Install dependencies
  • Fix import paths
  • Create a proper .gitignore and README.md
  • Run your app locally and show you a preview

4. Migrate Your Database → Firebase Firestore (Recommended)

Prompt the agent:

Set up Firebase Firestore for this project.
Use the db_export.json file I just added.
Create the necessary collections and import the data.
Add Firebase SDK and update my code to use Firestore instead of ReplDB.

The agent will automatically:

  • Create a Firebase project for you
  • Add firebase-config.js with your keys
  • Convert your ReplDB data into Firestore documents
  • Replace all db["key"] calls with Firestore queries

5. Deploy Your App (One-Click with Antigravity Agent)

Option A – Firebase Hosting (Static + Full-Stack) → FREE & Fastest

Prompt:

Deploy this full project to Firebase Hosting + Firebase App Hosting.
Make it live and give me the URL.

Agent does everything:

  • Runs npm run build or equivalent
  • Initializes Firebase CLI (you approve once)
  • Runs firebase deploy --only hosting
  • Shows you the live URL with a screenshot

Option B – Vercel / Netlify (if you prefer)

Prompt:

Deploy this project to Vercel with automatic CI/CD from GitHub.

Option C – Google Cloud Run (for heavy backends)

Just ask: “Deploy this Node/Flask/FastAPI app to Cloud Run”

Tips & Gotchas (November 2025)

  • Antigravity is in public preview → generous free Gemini quota, but very heavy agent use may hit limits.
  • Always review “Artifacts” before applying changes.
  • For large projects, use “Planning Mode” first → agent creates a full migration plan.
  • Join r/ChatGPTCoding – lots of Antigravity migration stories already.

Do NOT manually edit files while an agent task is running – it can cause conflicts.

Result

Most developers report completing the full migration (code + DB + live deploy) in under 45 minutes using Antigravity agents – vs. several hours manually.