# NexusLabs DevKit — 8+ Developer Tools > JSON Formatter, Base64, Hash, UUID, Regex, URL Encoder, Case Converter, JWT Decoder — all offline. Zero tracking. Canonical page: [https://chrome-stats.com/d/nexuslabs-devkit-dev-tools](https://chrome-stats.com/d/nexuslabs-devkit-dev-tools) ## Overview - **ID:** `nexuslabs-devkit-dev-tools` - **Platform:** Firefox - **Type:** Firefox add-on - **Status:** Available - **Publisher:** Akash Kumar Singh - **Category:** web-development,search-tools,tabs - **Version:** 1.0.0 - **Last updated:** 2026-03-11 - **First published:** 2026-03-08 - **Size:** 47 KB - **Data as of:** 2026-09-15 - **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/nexuslabs-devkit-dev-tools/) ## Description 🛠 NexusLabs DevKit — 8 Essential Developer Tools in One Extension Stop juggling browser tabs for basic dev tasks. NexusLabs DevKit puts 8 powerful, privacy-first developer utilities into a single beautiful popup — right in your browser toolbar. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ✅ TOOLS INCLUDED 1️⃣ JSON Formatter & Validator • Format (pretty-print) any JSON with proper indentation • Minify JSON to a single line • Validate JSON and see clear error messages • Syntax-highlighted output 2️⃣ Base64 Encode / Decode • Encode any text to Base64 • Decode Base64 back to readable text • One-click copy to clipboard 3️⃣ Hash Generator • Generate SHA-1, SHA-256, SHA-384, SHA-512 hashes • Instant computation using Web Crypto API • Perfect for verifying file integrity or generating checksums 4️⃣ UUID Generator • Generate RFC 4122 v4 UUIDs • Bulk generation mode — create multiple UUIDs at once • One-click copy 5️⃣ Regex Tester • Test regex patterns against sample text • Live match highlighting • Support for flags (g, i, m, s) • Group capture display 6️⃣ URL Encode / Decode • Percent-encode URL components • Decode percent-encoded strings • Handles special characters correctly 7️⃣ Case Converter • Convert between: camelCase, snake_case, kebab-case, PascalCase, UPPER CASE, lower case, Title Case • Paste in any format, click to convert 8️⃣ JWT Decoder • Decode JWT tokens instantly • View header and payload separately • Check token expiry time • No server needed — decoded entirely in your browser ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🔒 PRIVACY FIRST — ZERO DATA COLLECTION • No network requests — everything runs 100% locally in your browser • No analytics or tracking — we don't use Google Analytics, Mixpanel, or any tracker • No data storage — nothing is saved, cached, or persisted • No permissions — zero access to your browsing history, tabs, or data • Open source — full source code available on GitHub ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🎨 BEAUTIFUL UI • Modern glassmorphism dark theme • Clean tabbed interface — switch between tools instantly • Responsive layout that works at any zoom level • Smooth animations and visual feedback ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🌐 PART OF NEXUSLABS NexusLabs DevKit is part of the NexusLabs extension family — 14 extensions covering developer tools, converters, calculators, and more. Visit nexuslabs.website for 325+ free online tools. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 📋 PERMISSIONS This extension requires NO special permissions. It cannot: • Read your browsing history • Access your tabs or bookmarks • Make network requests • Store any data ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 💡 SUPPORT • GitHub: github.com/AkashKumarSingh11032001/nexuslabs-xtend • Website: nexuslabs.website • License: MIT (free and open source) ## Rankings - #134,596 — Overall - #124 — developer tools - #244 — developer ## Safety - **Risk impact:** Very low risk impact - **Risk likelihood:** Moderate risk likelihood ### Analysis details - This permission has no access or impact on the user's system or data, thus carrying no risk. - This extension has low user count. Unpopular extensions may not be stable or safe. > Some risk analysis details are omitted from this free response. 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