Text Case Converter

Convert selected text to UPPER, lower, Title, camelCase, snake_case or fix sentence capitalization via right-click menu

🔥 Stop retyping text just to change its case. Text Case Converter adds instant case conversion to your right-click menu — select any text in an input field, right-click, and transform it in one click. Six conversion modes, zero friction, works on every website. ✨ KEY FEATURES 📝 Six Powerful Text Case Conversions Convert selected text to any of these formats directly from the context menu: • UPPER CASE — make everything UPPERCASE for headings, acronyms, or emphasis • lower case — convert all characters to lowercase instantly • Title Case — Capitalize The First Letter Of Each Word for titles and headlines • camelCase — perfect for developers writing variable names and code identifiers • snake_case — ideal for programming, file naming, and database fields • Sentence case — Fix broken capitalization. Each sentence starts with a capital letter. ⚙️ Customizable Context Menu Not every conversion is relevant to every user. Open the popup and toggle individual case options on or off with simple switches. Only the conversions you actually use will appear in your right-click menu — keeping it clean and fast. ☁️ Settings Sync Across Devices Your toggle preferences are saved via Chrome's built-in sync storage. Log into Chrome on another computer, and your Text Case Converter settings are already there. No account creation, no sign-up — it just works. 🌐 Works on Any Website Text Case Converter supports standard input fields, multi-line textareas, and contentEditable rich text editors. Whether you are writing an email in Gmail, editing a post on WordPress, filling out a form, composing a message on Slack, or coding in an online IDE — the conversion menu is right there when you need it. 🌙 Dark Mode Support The popup interface automatically adapts to your system theme. Light mode or dark mode — it always looks right. 🌍 Localized in 55 Languages The extension name and description are translated into 55 languages so it feels native no matter where you are in the world. 🎯 HOW IT WORKS 1. Navigate to any website with a text input field, textarea, or contentEditable area. 2. Click inside the field and type or select the text you want to convert. 3. Right-click on the selected text to open the context menu. 4. Hover over "Text Case Converter" to see the available conversion options. 5. Click the conversion you need — your selected text is instantly replaced with the new case. That is it. No copy-pasting into an external tool. No leaving the page. No keyboard shortcuts to memorize. Just right-click and convert. Want to customize which options appear? Click the Text Case Converter icon in your toolbar to open the popup. Use the toggle switches to enable or disable individual conversions. Your changes take effect immediately and sync across all your Chrome browsers. 🔒 PRIVACY & SECURITY Text Case Converter is built with a strict privacy-first approach. Here is exactly what the extension does — and does not — do: • No data collection — the extension does not collect, store, or transmit any of your text. All conversions happen locally in your browser tab. • No analytics — there are no tracking scripts, no telemetry, no usage analytics of any kind. • No external requests — the extension makes zero network requests. No fonts loaded from CDNs, no remote scripts, no API calls. Everything is bundled locally. • No third-party code — the entire extension is written from scratch with vanilla JavaScript. No libraries, no frameworks, no dependencies. Permissions explained: • contextMenus — required to add the "Text Case Converter" submenu to your right-click context menu. Without this, the extension cannot function. • activeTab — required to send the conversion command to the current page when you click a menu item. The extension only interacts with the tab you are actively using. • storage — required to save your toggle preferences (which case conversions are enabled) and sync them across your Chrome browsers. The extension does not request access to your browsing history, bookmarks, downloads, or any other sensitive browser data. 💡 USE CASES For Writers and Content Creators You have just pasted a heading from a document and it is all uppercase. Instead of retyping it, select the text, right-click, and convert to Title Case or Sentence case in one click. Perfect for blog posts, articles, newsletters, and social media content. For Software Developers Need a camelCase variable name from a phrase? Or a snake_case database column name? Select the text in your online IDE, code editor, or issue tracker and convert it instantly. No more manually removing spaces and adjusting capitalization. For Students and Academics Formatting citations, adjusting title capitalization for bibliographies, or fixing text you accidentally typed with Caps Lock on — Text Case Converter handles it all without interrupting your workflow. For Social Media Managers Converting brand names to the correct case, fixing ALL CAPS text from client briefs, or quickly formatting post titles — right-click case conversion saves minutes on every piece of content. For Anyone Who Types Online Accidentally left Caps Lock on? Pasted text with broken formatting? Need to quickly normalize a block of text? Text Case Converter turns a tedious manual task into a single right-click. ⭐ WHY CHOOSE TEXT CASE CONVERTER Integrated Where You Work — Unlike web-based case converter tools that require you to copy text, switch tabs, paste, convert, copy again, and paste back, Text Case Converter works right inside the field where your text lives. No context switching. Lightweight and Fast — The extension uses minimal resources. The content script is small, efficient, and only activates when you trigger a conversion. No background processes running continuously, no memory bloat. Built on Manifest V3 — Text Case Converter uses Chrome's latest extension platform (Manifest V3) with a modern service worker architecture. This means better security, better performance, and full compatibility with Chrome's current and future extension standards. Respects Your Selection — The extension preserves your text selection after conversion so you can immediately see what changed and undo if needed. It also fires proper input events, so websites that track form changes (autosave, validation) work correctly. Clean Context Menu — The conversion options only appear when you right-click inside an editable field with text selected. They never clutter the context menu on images, links, or regular page text. Fully Customizable — Disable any conversion type you do not need. If you only use UPPER and lower, turn off the rest. Your context menu stays lean and relevant. 📋 TECHNICAL DETAILS • Platform: Chrome Extension, Manifest V3 • Service Worker: background.js handles context menu creation and message routing • Content Script: content.js performs all text transformations client-side • Storage: chrome.storage.sync for cross-device preference synchronization • Languages: 55 localizations for the extension interface • Performance: No continuous background processing; event-driven architecture activates only on user interaction • Dependencies: None — vanilla JavaScript, no external libraries or frameworks • Network activity: None — fully offline operation after installation 🚀 GET STARTED Click "Add to Chrome" and Text Case Converter is ready to use immediately. No configuration required — all six conversion options are enabled by default. Select text in any input field on any website, right-click, and start converting. Open the popup to customize which options appear in your menu. Fast, private, and built to stay out of your way until you need it. That is Text Case Converter.