Tools · Product Handbook

A polished set of web utilities I rely on every day — shared openly so anyone can get repeatable wins in seconds.

100% client-side

No accounts or logins

Instant handoff

Why it exists & guiding principles

The mission is simple: delete repetitive chores and reclaim minutes every day without sacrificing clarity or privacy.

I built Tools to solve the real fires that pop up every week: drafting SQL, validating JSON, testing regex, converting timestamps, assembling coordinates, or generating ASCII artwork for decks. Whenever a module saves me time, I publish it here so other teams can benefit instantly.

Everything runs in the browser to keep things fast, private, and predictable. No backend, no tracking pixels, no data collection. Open, use, copy, close. The philosophy stays sharp:

Meet concrete needs with direct, no-nonsense flows.
Share openly — no accounts, no paywalls, no friction.
Privacy first: nothing leaves your browser.
Interfaces so obvious that copy/paste is muscle memory.

Core tools

A snapshot of the utilities that get used and shared the most.

SQL Query Builder

Sketch tables with columns, data types, and constraints, then paste-ready CREATE TABLE/SELECT output.

JSON Formatter & Diff

Validate, format, and compare JSON with an interactive tree view and instant highlights.

Regex Tester

Prototype expressions, toggle flags, and see matches light up as you type.

Log Parser

Spotlight IPs, UUIDs, HTTP codes, and stack traces in giant log files within seconds.

Password & Fake Data Generators

Produce enterprise-strong passwords and believable datasets for QA, demos, and prototyping.

Everyday Utilities

UUIDs, timestamps, coordinates, QR codes, ASCII art, and more — always one click away.

Build principles

Privacy before everything. No information leaves your browser. A few modules uselocalStorage solely to remember local preferences.

Speed plus clarity. Direct interfaces, linear flows, and copy/paste front and center so anyone can understand what to do without manuals.

Radical sharing. Anything useful to me becomes public so anyone can get leverage. It is the fastest way to give back to the community.

Power shortcuts

Handy muscle-memory combos to move faster.

Command Palette

⌘+K

Toggle sidebar

⌘+M

Navigate lists

↑ ↓

Close palettes

ESC

Stack & contributions

Built with Next.js 15 (App Router), React 19, TypeScript, Tailwind CSS, and shadcn/ui components. Icons come from Lucide and the theme auto-detects light/dark.

Spot a bug or have an idea? Reach out — I love hearing how other people use these utilities or which enhancement would save their day.

Made with by Luis Peixoto Tools · free forever.Email: [email protected]