GTools: Developer Swiss Army Knife

20 developer tools in your toolbar. JSON, JWT, Regex, Diff, QR, and more. 100% local, zero network requests.

Stop pasting sensitive data into random websites. GTools puts 20 essential developer tools directly in your Chrome toolbar. Every tool runs 100% locally in your browser — zero network requests, zero telemetry, zero data collection. Your JWTs, JSON payloads, and API responses never leave your machine. TOOLS INCLUDED: Payload Modeler — Paste JSON, get a Go struct or TypeScript interface instantly JSON Formatter — Prettify, minify, and validate JSON with syntax highlighting JWT Inspector — Decode JWT tokens, inspect header/payload, check expiration String Utils — Base64, URL encoding, HTML entities — encode and decode Regex Tester — Write patterns, test against input, see matches highlighted live Epoch Time — Convert between Unix timestamps and human-readable dates Hash Generator — SHA-1, SHA-256, SHA-384, SHA-512 using Web Crypto API Color Converter — HEX, RGB, HSL conversion with a visual color picker CSS Shadow — Visual box-shadow builder with live preview and CSS output Lorem Ipsum — Generate placeholder text by paragraphs, sentences, or words UUID Generator — Batch UUID v4 generation in standard, uppercase, or bare format Diff Viewer — Side-by-side text comparison with LCS-based diff algorithm Cron Parser — Explain cron expressions in plain English, see next 5 run times Number Base — Convert between binary, octal, decimal, and hexadecimal Markdown Preview — Live side-by-side markdown renderer with full syntax support QR Generator — Generate QR codes from text or URLs, download as PNG XML / SQL Formatter — Prettify and minify XML, HTML, and SQL queries JSON Path — Query JSON with JSONPath expressions, extract nested data Ticket-to-Git — Turn your current tab's title into a git branch name in one click State Surgeon — Nuke localStorage, sessionStorage, and cookies for the active tab PRIVACY FIRST: - Only 2 Chrome permissions (activeTab + scripting), both require your explicit action - No background scripts, no content scripts - No analytics, no tracking pixels, no ads - No account required, no sign-up, no paywall - Open source: https://github.com/venkatdhurjati/GTools POP OUT TO FULL TAB: Need more screen space? Click the expand button in the top-right corner to open GTools in a full browser tab. No extra permissions needed. KEYBOARD SHORTCUTS: / — Focus the sidebar search Escape — Clear search and return Built by developers, for developers. MIT Licensed. --- For Category, select Developer Tools. For Language, select English.