ShipFast ProProduct preview
ShipFast Pro
A Next.js 16 + Tailwind v4 starter kit that ships authenticated SaaS in a weekend.
Learn moreIndie engineer · Building tools and SaaS
Build. Sell. Share.
Tools and SaaS by Tony — free to use, no signup needed.
Crafted with care for VN and global dev communities.
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Products
SaaS and software I'm building and selling — each product crafted and maintained directly.
VibeCode BlocksProduct preview
VibeCode Blocks
A library of copy-paste section blocks built on Tailwind v4 and Base UI — hero, features, pricing, CTAs.
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Tools
Mini tools I built for daily use — JSON formatter, base64, regex tester. Free, no signup, runs straight in your browser.
JSON Formatter
Paste JSON, get it formatted and validated. Free, no signup, runs in your browser.
#json#formatter#validator
Regex Tester
Test JavaScript regex patterns with live matching and capture group highlighting.
#regex#validator
Base64 Encoder
Encode and decode Base64 strings — text, URLs, file content. Browser-native, no network calls.
#base64#encoder#decoder
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Latest tips
Lessons learned shipping products — Next.js, React, Tailwind, performance. Bilingual EN/VI.
Three Next.js App Router pitfalls that bit me
Async params, hardcoded locale assumptions, and the Server/Client boundary — three subtle traps when migrating from Pages to App Router.
- #nextjs
- #app-router
Why useEffect runs twice in dev (and why it's a good thing)
Strict Mode mounts → unmounts → remounts every component in dev. Here's what's actually happening and why your effects should embrace it.
- #react
- #useeffect
When `@apply` is justified (and when it's an anti-pattern)
Tailwind's @apply directive looks like a great escape hatch — but reaching for it too often signals you've lost the plot. Here's the heuristic.
- #tailwind
- #css
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Work together
TP
Hi, I'm Tony. I build SaaS products and take on select Next.js projects. Drop me a line — I'll reply within 24 hours.