# Toolzy — Privacy-First Developer Tools & Utilities > The ultimate offline developer toolbox. 40+ fast, zero-tracking client-side tools for formatting, encoding, cryptography, regex testing, PDF optimization, and instant quick search right in your new tab or popup. Canonical page: [https://chrome-stats.com/d/toolzy-suite](https://chrome-stats.com/d/toolzy-suite) ## Overview - **ID:** `toolzy-suite` - **Platform:** Firefox - **Type:** Firefox add-on - **Status:** Available - **Publisher:** Sayandeep Majumdar - **Category:** web-development - **Version:** 1.0.0 - **Last updated:** 2026-08-25 - **First published:** 2026-08-22 - **Size:** 13 MB - **Data as of:** 2026-09-07 - **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/toolzy-suite/) - **Website:** [https://sayandeepmajumdar.github.io/tools/](https://sayandeepmajumdar.github.io/tools/) - **Privacy policy:** [https://addons.mozilla.org/firefox/addon/toolzy-suite/privacy/](https://addons.mozilla.org/firefox/addon/toolzy-suite/privacy/) ## Description ⚡ Toolzy — The Ultimate Privacy-First Developer Workspace & Offline Toolbox Tired of opening slow, ad-cluttered websites just to format a JSON string, decode a Base64 token, or inspect a JWT? Toolzy brings 50+ professional developer utilities, formatters, encoders, cryptographic tools, and visualizers directly into your browser. Run everything 100% client-side in your browser with zero network tracking, zero backend servers, and zero data collection. Whether you need a full New Tab developer hub or a quick keyboard-driven launcher in your toolbar, Toolzy is designed to accelerate your everyday engineering workflow. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🔒 100% PRIVATE & OFFLINE-FIRST ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ • Zero Server Uploads: All operations run locally inside your browser using WebAssembly, Web Crypto API, and local sandboxes. • Zero Telemetry & Tracking: No analytics, no logging, no external API calls. Your tokens, API keys, and sensitive data never leave your computer. • 100% Offline Capable: Works anywhere, anytime — even without an internet connection. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🚀 40+ ESSENTIAL DEVELOPER SUITES INCLUDED ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 📦 FORMATTERS & CONVERTERS: • JSON Formatter, Validator & Fixer (with JSON5 & tree navigation) • YAML ⮂ JSON Converter & Formatter • XML Formatter, Minifier & XPath Evaluator • CSS & HTML Beautifiers & Minifiers • JavaScript Formatter, Minifier (Prettier & Terser engines) • SQL Formatter with dialect support (PostgreSQL, MySQL, SQLite) • JSON to CSV / CSV to JSON converter with live preview 🔐 CRYPTO, SECURITY & ENCODING: • Base64 Encoder & Decoder (Unicode UTF-8 safe, URL-safe, Image preview) • JWT Decoder & Inspector (Payload parser, expiration audit, signature check) • AES-256 GCM/CBC Encryption & Decryption (In-browser Web Crypto) • RSA Keypair Generator & Signature Verifier • Hash Generator (MD5, SHA-1, SHA-256, SHA-512, HMAC) • Password & Passphrase Generator (Entropy calculation, customizable rules) • URL Encoder, Decoder & Component Parser ⚡ PRODUCTIVITY & GENERATORS: • UUID / ULID / CUID Generator (Single & Bulk with namespace v1/v4/v5/v7) • Regex Tester & Debugger (Interactive match visualization & cheat sheet) • Cron Expression Tester & Schedule Builder (Human-readable explanations) • API Request Tester (Lightweight HTTP client with headers & curl import) • In-Browser PDF Compressor (Smart image downsampling & metadata stripping) • CSV to PDF / Business Card & Invoice PDF Exporters • Barcode & QR Code Generators (SVG/PNG downloads) • Color Palette Extractor & Contrast Checker (WCAG 2.1 compliance) 🎨 DIAGRAMS & PLAYGROUNDS: • Architecture Diagram Builder (Mermaid.js diagramming) • BPMN Process Flowchart Editor • React & Vue Sandboxed Playgrounds • SQL Query Sandbox & Schema Visualizer ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 💡 DESIGNED FOR YOUR WORKFLOW ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ • 🌐 New Tab Dashboard: Transform your blank new tab into a sleek, dark-mode developer workstation. • 🚀 Quick Popup Launcher: Access your starred tools and 1-click UUID/Timestamp generators from the toolbar. • 🖱 Right-Click Context Menus: Highlight text on any web page to instantly "Format JSON", "Decode Base64", or "Inspect JWT". • 🌓 Rich Dark Mode & Light Mode: Beautiful glassmorphism aesthetic built for long coding sessions. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ⭐ OPEN SOURCE & COMMUNITY DRIVEN ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Toolzy is built with love for the developer community. Fast, lightweight, and completely free. ## Rankings - #146,741 — Overall - #154 — developer tools ## Permissions and access ### Permissions - `storage` - `contextMenus` ## Safety - **Risk impact:** Low risk impact - **Risk likelihood:** High risk likelihood ### Analysis details - Can alter new tab settings; fairly benign but with some capability to affect user experience. - This extension was recently updated in the past month. New updates may not be stable or safe. > Some risk analysis details are omitted from this free response. 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