masstensor

Open-source developer tools. Zero dependencies. TypeScript-first.

15
Repositories
29
API Endpoints
11
Online Tools
147
Tests Passing

CLI Tools

envcheck-cli

Validate .env files against .env.example. Catch missing, extra, and empty variables before they break your app.

npx envcheck-cli
JavaScript

promptbox

Manage, version, and share your AI prompts from the terminal. Template variables, tagging, search, clipboard copy.

npx promptbox-cli init
JavaScript

gitquick

Lightning-fast git shortcuts. Undo commits, quick save, cleanup branches, repo stats — all in one command.

gq save "quick fix"
TypeScript

changelogen

Generate beautiful changelogs from conventional git commits. Groups by type, highlights breaking changes.

changelogen --init
TypeScript

httpstat

Visualize HTTP request timing in your terminal. DNS, TCP, TLS, server processing breakdown with color bars.

httpstat https://example.com
TypeScript

DevTools API — Paid Service

DevTools API

All developer tools in one API. JSON utilities, GitHub trending, Hacker News, HTTP timing. Free tier: 100 req/day. Pro: $5 USDT/month for 10,000 req/day.

API Dashboard Get Free Key Telegram Bot
TypeScriptLIVEPAID

APIs & Services

jsonkit

JSON utilities API — format, validate, diff, minify, flatten, query, convert to YAML. CORS enabled.

Live API
TypeScriptLIVE

devtrends

Trending developer tools aggregator. GitHub trending repos + Hacker News top stories. Dashboard + API.

Live Dashboard
TypeScriptLIVE

Free Online Tools

JSON Formatter

Format, validate, and minify JSON online. No signup needed.

LIVE

UUID Generator

Generate UUIDs instantly. Bulk generation supported.

LIVE

Password Generator

Generate cryptographically secure passwords.

LIVE

Base64 Tool

Encode and decode Base64 strings online.

LIVE

Hash Generator

SHA-256, MD5, SHA-512 hash generator.

LIVE

Timestamp Converter

Convert Unix timestamps to human-readable dates.

LIVE

QR Code Generator

Generate QR codes for any URL or text.

LIVE

Color Converter

Convert colors between HEX, RGB, and HSL.

LIVE

Markdown Editor

Live Markdown editor with instant preview. Write and export with ease.

LIVE

Regex Tester

Test regular expressions with real-time matching and group highlighting.

LIVE

Cron Parser

Parse and validate cron expressions. See next execution times instantly.

LIVE

GitHub Actions & Resources

envcheck-action

GitHub Action to validate .env files in CI/CD. Drop into any workflow with one line.

uses: masstensor/envcheck-action@main
GitHub Action

json-validate-action

Validate all JSON files in your repo during CI/CD. Catch malformed JSON before production.

uses: masstensor/json-validate-action@main
GitHub Action

awesome-ai-devtools

Curated list of 40+ AI-powered developer tools, coding assistants, and productivity boosters for 2026.

Awesome List