18 Dev Tools, Zero Friction

No signup. No server. Runs in your browser.

✓ 100% Free
✓ No Signup
✓ Privacy First
✓ Works Offline (PWA)
🤖

AI Context Optimizer NEW

Compress code before sending to ChatGPT, Claude, or Gemini. Strip comments, blank lines, mask secrets. Save tokens and money.
⚡

Zod to TS & Prisma NEW

Convert Zod schemas to TypeScript interfaces or Prisma models. Keep validation and type definitions in sync.
🔍

Regex Visualizer NEW

Token-by-token regex breakdown with plain-English explanations and real-time match highlighting.
⏰

Cron Checker & Decoder NEW

Decode any cron expression into plain English, check your schedule, and predict the next 10 execution times.
⚙

GitHub Actions Cron NEW

Validate your GitHub Actions schedule cron expression. See next 10 UTC execution times before deploying.
☁

AWS EventBridge Cron NEW

Validate AWS EventBridge cron expressions with 6-field syntax, ?, L, W, # wildcards. Preview next 10 UTC runs.
🌐

Cron Timezone Converter NEW

Convert cron schedules between timezones. See execution times side by side with DST handling.
🗃

SQL to Prisma / TypeORM NEW

Convert SQL CREATE TABLE statements to Prisma schemas or TypeORM entities instantly.
🎨

SVG to React / CSS NEW

Convert SVG markup to React JSX components or CSS data URIs with live preview.
⚡

JSON Formatter

Format, validate, and minify JSON. Instant syntax error detection with detailed messages.
🔒

Base64 Encoder

Encode text to Base64 or decode Base64 to plain text. Full Unicode support including emojis.
🔗

URL Encoder

Encode special characters for safe URL usage or decode percent-encoded URLs.
🎲

UUID & Password Gen

Generate cryptographically random UUID v4 identifiers and strong passwords.
🎨

Color Converter

Pick a color or enter hex. Get HEX, RGB, and HSL values instantly. Click to copy.
📝

Text Counter

Real-time character, word, sentence, paragraph counts with text transformation utilities.
🔒

Hash Generator

Generate SHA-1, SHA-256, and SHA-512 hashes using the Web Crypto API.
💳

JWT Decoder

Decode and inspect JWT headers and payloads. Check token expiration instantly.
📊

Text Diff Checker

Compare two text blocks side by side. Added lines in green, removed in red.

Developer Guides

In-depth technical articles to level up your development skills.

🤖

Reduce LLM API Costs

Practical token optimization strategies to cut your AI API bills by up to 80%.
🔒

JWT Authentication Guide

Complete guide to token-based security with Node.js implementation examples.
🔍

Regex Complete Guide

Master regular expressions with 10 essential patterns every developer needs.
🗃

ORM Comparison 2026

Prisma vs TypeORM vs Drizzle — side-by-side with real code examples.

View all 8 guides →

Frequently Asked Questions

Yes, all 18 developer tools are 100% free with no signup, registration, or hidden fees. We believe essential developer utilities should be freely accessible to everyone.
Your data is completely safe. Every tool runs 100% in your browser using client-side JavaScript. No data is ever sent to our servers. You can verify by checking the Network tab in your browser's developer tools (F12). This makes it safe to process sensitive data like API keys, tokens, and passwords.
Each tool has a "Share" button that encodes your current input into the page URL using Base64. When someone opens the shared link, the tool automatically loads with your exact data. The data is stored entirely in the URL hash (after the # symbol), which is never sent to the server — so even shared links maintain complete privacy.
Most regex testers only show matches. Our Regex Visualizer goes further by parsing your pattern token-by-token and explaining each part in plain English. This makes it easy to understand complex patterns you inherit from others, learn regex syntax, and debug issues. Combined with real-time match highlighting and shareable URLs, it is a complete regex development environment.
Yes! Quick Dev Tools is a Progressive Web App (PWA). Click "Install" in your browser to add it to your device, and all tools work completely offline. The only features requiring internet are external fonts (which degrade gracefully) and analytics. All core tool functionality works offline — your data never leaves your device.
Quick Dev Tools works on all modern browsers: Chrome, Firefox, Safari, Edge, and Opera. We use standard Web APIs (Web Crypto, Clipboard) supported in all browsers released after 2020. Hash generation requires HTTPS due to Web Crypto API requirements.