HeoLab
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HeoLab

Free developer tools with AI enhancement. Built for developers who ship.

Tools

  • JSON Formatter
  • JWT Decoder
  • Base64 Encoder
  • Timestamp Converter
  • Regex Tester
  • All Tools →

Resources

  • Blog
  • What is JSON?
  • JWT Deep Dive
  • Base64 Explained

Company

  • About
  • Contact
  • Privacy Policy
  • Terms of Service

© 2026 HeoLab. All rights reserved.

Tools work in your browser. Zero data retention.

Trong Ngo — creator of HeoLab

Trong Ngo

Creator of HeoLab

Ho Chi Minh City, Vietnam

Full-stack developer specializing in TypeScript, Next.js, and modern backend systems. I graduated in 2023 and have been shipping ever since.

HeoLab started with a simple goal: build developer tools I'd actually want to use myself — fast, clean, and smart when you need AI to help. The name comes from my Vietnamese nickname “Heo” (🐷), and “Lab” because every release is an experiment in what a developer tool can be.

I believe the best developer tools get out of your way. They load instantly, respect your data, and give you answers — not friction. That's the standard every HeoLab tool is held to.

NgoTTrongSay hello

What HeoLab stands for

Four principles that guide every design decision, from UI copy to how data is (not) stored.

Speed is a feature

Every millisecond of latency is a paper cut. HeoLab tools are designed to respond instantly — most run entirely in your browser.

Privacy by default

Your data is yours. Nothing you paste into HeoLab is logged, stored, or analyzed. Privacy is the baseline, not an afterthought.

AI that explains

AI features in HeoLab exist to help you understand your data, not just process it. Optional, contextual, and always in your control.

Made with care

Every tool is built to the standard I'd hold my own work to — well-documented, edge-case aware, and genuinely useful.

The journey

From a confused CS freshman to shipping developer tools used by engineers around the world — here's how it happened.

2019

First Line of Code

Enrolled in Computer Science at university in Ho Chi Minh City. Wrote my first C program and stared at a pointer bug for three days straight. That debugging session taught me more than any lecture — and I was hooked.

C → Java → "why are there so many null pointer exceptions?"
2020

The Web Opens Up

Discovered JavaScript and realized the web was where I wanted to build. First dynamic pages, first API calls, first time seeing data update on screen without a refresh. That feeling of instant feedback became addictive.

JavaScript · HTML · CSS · REST APIs · first 1,000 lines of real code
2021

GitHub & Real Shipping

Committed to finishing projects instead of leaving them half-done. Started with an expense tracker, then a shopping app. Joined GitHub and discovered open source — reading other people's code accelerated my growth faster than anything else.

TypeScript · Git · first 100 commits · open source exploration
2022

Full-Stack Goes Deep

Built production-grade systems: a Learning Management System with course creation and progress tracking, an HRM dashboard with payroll features, and multiple REST API backends. Discovered Next.js and fell in love with the developer experience. Late nights, strong coffee, real shipping.

React · Next.js · Node.js · PostgreSQL · 6 production projects
2023

Graduated & Went Deeper on AI

Graduation thesis: an AI-integrated microservices gateway — built in Python, containerized with Docker, wired through CI/CD pipelines. First time designing a system meant to scale. Graduated with honors. Then immediately started building more.

Python · Microservices · Docker · AI integration · graduated
2024

HeoLab Is Born

I kept reaching for the same tools every day while building other projects — JSON formatters, JWT decoders, regex testers. I wanted them to be faster, cleaner, and smarter. So I built them. HeoLab launched publicly with a small set of tools and grew quickly from there.

Next.js 15 · Supabase · Tailwind v4 · Claude AI · public launch
2025Now

Building with the Community

HeoLab keeps expanding based on what developers actually ask for. New tool categories added, AI features deepened, blog launched with technical guides. Still a solo project — shaped by every bug report, feature request, and message from someone who finds the tools useful.

Growing toolkit · deeper AI · community-driven roadmap · this is just the start

Tech stack

HeoLab runs on the same stack I use in every production project. Chosen for developer experience, reliability, and zero lock-in.

TypeScript

Primary language

Next.js

Full-stack framework

Supabase

Database & auth

Node.js

Backend runtime

React

UI layer

Docker

Containers & CI/CD

Selected projects

A sample of what I've shipped on GitHub — from full-stack apps to backend APIs.

All repos →

LMS

A full Learning Management System with course creation, enrollment, and progress tracking.

TypeScript · Next.js

Toeic Backend API

RESTful API backend for a TOEIC exam preparation platform with authentication and progress analytics.

TypeScript · Node.js

Expense Management System

Personal finance tracking app with categorization, reporting, and budget management.

TypeScript

HRM Frontend

Human Resource Management dashboard with employee records, payroll, and leave management.

TypeScript · React

Spendwise

Smart spending tracker with insights and AI-powered financial summaries.

TypeScript

AI Gateway

Microservices gateway with AI integration — the system powering my graduation thesis.

Python · Microservices
View all repositories →

Have a tool idea, a bug, or just want to say hi?

HeoLab is a solo project shaped entirely by what the community finds useful. Every message gets a real reply.

Get in touchGitHub