Flask Vibe Tutorials
Learn Flask + PostgreSQL + Vanilla JS through practical examples
In-Depth Guides
Long-form field guides drawn from real production experience.
Flask Memory Leaks You Will Hit
Streaming proxies, connection pool traps, unbounded caches, Flask-Limiter pitfalls — and how to diagnose them.
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Flask Security Model
SQL injection, CSRF, session management — how Flask's explicit approach makes security verifiable.
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Deploying Flask to Production
Gunicorn, gevent, nginx, Railway, Render, Fly.io — the full production deployment stack explained.
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Flask in Production: Real Companies
Instagram, Pinterest, Airbnb, Netflix — real deployments, real scale, real architectural lessons.
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Flask vs Next.js Benchmark
Methodology, results, and what the numbers actually mean for your production app.
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WordPress to Static Site with AI
How to migrate a WordPress site to a static Flask-generated site using AI assistance.
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Filters
Modular Vanilla JS That Outperforms Frameworks
In 2026, properly modularised vanilla JavaScript — paired with AI tooling and native browser APIs — matches framework productivity while delivering smaller bundles, zero abstractions, and 100/100 Lighthouse scores. This tutorial shows you the full architecture: reactive state, component pattern, client-side router, and lazy loading.
Transactional Email with Resend
Send welcome emails, password resets, and notifications from Flask using the Resend API. Keep your routes thin with a reusable utils/email.py helper.
Password Reset Flow
Build a complete forgot-password flow: generate a secure time-limited token, email a reset link, validate it, and update the password safely.
Deploying Flask to Railway
Take your Flask + PostgreSQL app from localhost to a live Railway deployment. Covers Procfile, gunicorn, managed database setup, and environment variables.
Building a JSON REST API
Build a clean JSON API in Flask with consistent response envelopes, API key authentication via database lookup, and proper HTTP status codes.
Pagination: OFFSET and Cursor-Based
Add page-by-page navigation to any Flask listing with LIMIT/OFFSET, then level up to cursor-based pagination for high-performance lists that never slow down.
Full-Text Search with PostgreSQL
Add powerful search to your Flask app using PostgreSQL's built-in tsvector and tsquery — no Elasticsearch, no extra service, no extra cost.
Testing Flask Routes with pytest
Write reliable tests for your Flask routes using pytest and Flask's built-in test client. Covers fixtures, test databases, JSON assertions, and mocking external APIs.
File Uploads with Validation
Handle file uploads safely in Flask: validate file types and sizes, use secure_filename, save to disk, and store the path in PostgreSQL.
Localization with Flask-Babel
Translate your Flask app into multiple languages using Flask-Babel. Covers string extraction, .po files, locale detection, and a language switcher.
PostgreSQL Connection Pooling with psycopg2
Stop opening a new database connection on every request. Learn how to use psycopg2's ThreadedConnectionPool to reuse connections efficiently.
Rate Limiting with Flask-Limiter
Protect your routes from abuse and brute force attacks with Flask-Limiter. Set per-route limits, customize error responses, and use Redis for production.