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View markdown files as beautifully rendered HTML with GitHub Flavored Markdown support Transform your markdown files into gorgeously formatted HTML instantly! Markdown Viewer automatically detects .md and .markdown files and renders them with beautiful GitHub-style formatting. Perfect for developers, writers, and anyone who works with markdown files. • GitHub Flavored Markdown - Tables, task lists, strikethrough, and more • Syntax Highlighting - 15+ programming languages (JavaScript, Python, Go, Rust, TypeScript, JSX, TSX, Java, PHP, Ruby, Bash, JSON, YAML, SQL, CSS, and more) • Dark & Light Themes - Easy on the eyes, day or night, with automatic theme persistence • One-Click Copy - Copy code blocks instantly with hover buttons • Task Lists - GitHub-style checkboxes that actually look like checkboxes • Raw View - Toggle between rendered HTML and raw markdown source • Paste & Render - Paste or type markdown directly in the built-in editor and render it on the fly • Render Selected Text - Select markdown on any webpage, click the icon or right-click, and view it beautifully rendered in a new tab • Completely Local - All rendering happens in your browser, zero data collection 🎯 PERFECT FOR • Reading documentation files locally • Reviewing markdown files before committing to Git • Previewing README files for GitHub projects • Reading project notes and specifications • Viewing markdown exports from note-taking apps • Quickly rendering markdown from your clipboard • Developers working with markdown documentation See markdown on any webpage? Render it instantly: • Select any text on a webpage • Click the Markdown Viewer icon in the toolbar, or right-click and choose "Render selection as Markdown" • A new tab opens with the text beautifully rendered Works on any webpage — great for previewing markdown in GitHub comments, pull requests, documentation, chat messages, or anywhere else. Want to quickly preview some markdown? Paste or type it directly: • Click the extension icon (no text selection needed) • Click the { } button in the top-right to open the editor • Paste or type your markdown • Click 📄 (or press Ctrl/Cmd+Enter) to render it Toggle back and forth between editing and rendered view anytime! Perfect for quickly previewing markdown from your clipboard, drafting formatted text, or experimenting with markdown syntax. • 100% local - all rendering happens in your browser • No tracking or analytics whatsoever • No network requests (except images in your markdown) • No data collection of any kind • Open source - review the code yourself on GitHub Supports all standard markdown features plus GitHub Flavored Markdown extensions: • Headers (H1-H6) with proper hierarchy • Bold, italic, strikethrough text formatting • Lists (ordered, unordered, nested) • Links and images (local and remote) • Tables with column alignment • Task lists with interactive checkboxes • Code blocks with syntax highlighting • Inline code formatting • Blockquotes with proper styling • Horizontal rules • Line breaks and paragraphs Beautiful code syntax highlighting for 15+ programming languages: • JavaScript, TypeScript, JSX, TSX • Python, Go, Rust • Java, PHP, Ruby • Bash/Shell scripting • JSON, YAML • SQL, CSS • Markdown itself 1. Install the extension 2. Go to chrome://extensions/ and find "Markdown Viewer" 3. Click "Details" and enable "Allow access to file URLs" (important!) 4. Open any .md file in Chrome, or select text on any webpage and click the extension icon 5. Watch it transform into beautiful HTML! • Light Theme - Clean, readable design with dark text on white background • Dark Theme - Easy on the eyes with light text on dark background • Your theme choice is automatically saved and persists across sessions • 🌙/☀️ Toggle - Switch between dark and light themes instantly • { } Button - Open the markdown editor or view raw source • 📄 Button - Render editor content back to formatted markdown • Filename Display - Always know which file you're viewing • Use relative paths for images:  • Keyboard shortcuts work: Ctrl/Cmd+F to search, Ctrl/Cmd++/- to zoom • Press Ctrl/Cmd+Enter in the editor to quickly render your markdown • Reload (F5) if you edit the markdown file on disk • Works great with locally cloned GitHub repositories • Perfect for viewing documentation while coding This extension is open source under the MIT License. Contributions welcome! GitHub: https://github.com/matpb/markdown-viewer-extension 🤝 BUILT WITH • marked.js - Fast markdown parser with GFM support • Prism.js - Lightweight syntax highlighter • GitHub Markdown CSS - Official GitHub markdown styling Made with ❤️ by humans and AI working together.
InfoSE
Quickly access relevant information for selected word Introducing "InfoSE," the ultimate extension for lightning-fast access to relevant information right at your fingertips. With InfoSE, effortlessly explore top relevant results for selected word, neatly organized within accordion-style panels, each offering a concise summary for quick insights. Key Features: Effortless Access: Simply highlight any word or phrase on your browser, and InfoSE springs into action, fetching relevant information instantaneously. Accordion Interface: InfoSE presents search results in a sleek accordion format, allowing you to expand and collapse each panel effortlessly. This intuitive design enables efficient browsing without cluttering your screen. Comprehensive Summaries: Dive into succinct summaries within each accordion panel, providing essential details without overwhelming you with excessive information. Whether it's definitions, explanations, or background context, InfoSE delivers the highlights at a glance. Wikipedia Integration: Seamlessly explore Wikipedia entries directly within InfoSE. With a single click, delve into comprehensive articles, gaining in-depth understanding on your chosen topic without leaving your browsing session.
JSON Studio: Viewer, Formatter, Editor, Query & Converter
The all-in-one workbench. Format, beautify, minify, view, edit, query (JMESPath) & convert JSON to code and data formats. STOP juggling multiple extentions for one job & Install JSON Studio today Transform your browser into a powerful JSON IDE. JSON Studio is not just a viewer; it is a complete workbench for developers who need to format, query, edit, and convert JSON data instantly. Why is this the best JSON extension? Unlike standard viewers that only pretty-print, JSON Studio combines a Smart Page Viewer, a JMESPath Query Engine, and a Code Generator into one lightweight tool. 1.Intelligent JSON Page Viewer Automatically detects JSON content on any website and renders it in a beautiful, interactive interface. ✓ Tree View & Raw View: Switch between raw text and interactive nodes. ✓ Search & Navigation: Deep search through keys and values. ✓ Editable: Edit JSON directly in the browser, minify, and save. ✓ Themes: Dark mode and Light mode support. ✓ Minify JSON: Compress your JSON data by removing whitespace ✓ JSON Beautifier 2. Advanced JMESPath Querying Stop pasting JSON into external tools. Run complex queries directly in the extension. ✓ Filter, sort, and reshape your JSON data using JMESPath. ✓ Syntax highlighting for query results. ✓ Save your favorite queries for repeated use. 3. Instant Code Conversion (JSON to Code) Convert your JSON response into a type definition for your backend or frontend language instantly. ✓ Supported Languages: TypeScript, C#, Java, Python (Dataclasses), Go (Structs), Kotlin. ✓ Data Formats: Convert JSON to CSV, YAML, and XML. ✓ Handle Large Files: Optimized performance for massive JSON payloads. ✓ Sort & Clean: Sort keys (A-Z) and toggle linkified URLs. ✓ Local & Secure: All processing happens in your browser. No data is sent to the cloud. ✓ 100% local processing. Your data never leaves your browser ✓ No cloud uploads, no server connections, no tracking ✓ Works completely offline ✓ No signup or account required Install now. it's free, fast, and respects your privacy.
CodePrettify: JS, JSON, CSS & RSS Formatter
Format, preview, and highlight JS, TS, JSON, JSONL, YAML, Markdown, CSS, and XML/RSS. Themes, tools, and line numbers. CodePrettify turns raw developer files into an IDE-like experience the moment you open them — formatting, navigating, validating, diffing, and even executing JavaScript directly in the browser. Works on JSON, JSON Lines (NDJSON), JavaScript, TypeScript, CSS, YAML, XML, and RSS/Atom, for both web responses and local files. 📊 STRUCTURED DATA SUPPORT • JSON, JSON Lines, XML, RSS, Atom, YAML (.yaml / .yml), and TypeScript (.ts / .mts / .cts) • Collapsible JSON with breadcrumb navigation and JSON Path tools (autocomplete, validation, copy per result) • Clickable URLs and import paths in JSON and XML • Table View: sortable, searchable tables for JSON arrays of objects and repeating XML elements, with chunked loading for large datasets 🚀 SMART AUTOMATION & FORMATTING • Auto-format with minification detection so compressed files are beautified and readable ones are left unchanged • Modern CodeMirror 6 engine with VS Code-inspired highlighting • Code folding for functions, classes, objects, arrays, and XML blocks • Bracket matching and a zero-flash loader that prevents raw-content flicker 🧪 JAVASCRIPT PLAYGROUND • Runs real JavaScript in a sandboxed Web Worker with a configurable 1 / 5 / 15 s timeout • Captures console.log/info/warn/error/debug and renders console.table as a real HTML table • Reports return value, execution time, and full stack traces • Optional “Include {filename}” prepends the current file so you can call its top-level functions • Autocomplete for functions, methods, classes, and variables from both the Playground and the current file, with parameter signatures • Top-level await, Tab / Shift+Tab indent/dedent, and auto-persisted code across sessions • Ctrl+Alt+P to open, Ctrl+Enter to run, Ctrl+Space to trigger autocomplete 🌐 HTTP CLIENT • Full Postman-style HTTP Client available on any HTTP/HTTPS page — not just JSON or RSS responses • Compose requests with a method picker, URL field, and Send button, plus dedicated Params, Auth, Headers, and Body tabs • Auth presets: No Auth, Bearer Token, Basic Auth, and API Key (header or query parameter) • Body modes: None, JSON with inline validation, raw text, and x-www-form-urlencoded • Save named requests, keep a reusable Saved collection plus per-URL History, and sync data across supported browsers • Environments with {{variable}} interpolation in URLs, params, headers, auth, and body, with a live resolved-URL preview before sending • Import existing cURL commands into the visual editor • Copy requests as cURL, fetch(), or PowerShell Invoke-RestMethod • Inspect responses in Body, Headers, Cookies, and Raw tabs • HTTP request metadata now lives inside Statistics & Diagnostics instead of a separate HTTP Context popup 🧭 NAVIGATION & LARGE FILES • Document Navigator outline for JSON, JavaScript, and XML • Syntax-aware code minimap rendered on an offscreen canvas • Per-URL view state: fold state, search, highlights, and mode restored automatically • Shareable Configuration URL restores the exact view for teammates • Go To Line (Ctrl+G) remembers your last line number 🔍 INSIGHTS & VALIDATION • Diagnostics Panel with syntax status, warnings, and file-type-specific insights • Statistics for file size, lines, JSON depth, JS functions/vars, CSS selectors, XML tags/attributes • Built-in validation for JSON, JavaScript, TypeScript, CSS (line/column reporting), and XML 🧬 COMPARE & DIFF • Full-screen split-view diff (Ctrl+Alt+D) with line-level diffing, synced scrolling, stats, and swap-sides 🔎 SEARCH & INTERACTION • Floating search (Ctrl+F) with live result counting • Regex search via /pattern/flags • Clickable URLs and relative import paths 🔐 DATA INSPECTION • Inline Base64 and JWT decoding with a dedicated copy modal • Unix timestamp detection (seconds and milliseconds) with readable tooltips • ISO 8601 and RFC 822 date tooltips in JSON, XML, and RSS 🔎 REGEX PLAYGROUND • Test regex patterns live against any open file or response • Instant match highlighting in the main viewer with gimsuy flag controls • Match list with counts, line/column locations, and one-click jump to each result • Capture groups and named groups shown for the active match under the cursor • Built-in regex guide plus example library for common real-world patterns • Recent patterns are remembered, and Ctrl+Alt+R opens the playground instantly 📤 EXPORT & SHARING • PNG export (visible viewport or full file) with syntax-colored rendering • CSV export for JSON arrays of flat objects and RSS/Atom feed items • HTML table export for any tabular JSON or XML • Copy original, formatted, or minified code from one toolbar button 🌐 REQUEST CONTEXT • HTTP Context Panel: URL, content type, encoding, size hints, and timing • cURL and fetch() command generator with cross-platform-safe quoting 🎨 CSS TOOLS • Hex and RGB swatches with a built-in color picker (HEX, RGB, HSL copy) 🔒 PRIVACY & SECURITY • 100% local processing; no external requests, telemetry, or third-party runtime dependencies • Playground code runs in a null-origin sandbox iframe and a fresh Web Worker per execution — no access to the host page, the extension, or the network • Safe for APIs, tokens, internal systems, and production data 📂 WORKS EVERYWHERE • HTTP/HTTPS responses and local files (file:///) • Detects JSON, YAML, TypeScript, and other types from Content-Type when the URL has no matching suffix 📝 LOCAL FILES Enable “Allow access to file URLs” in your browser’s extension settings for CodePrettify to use it on file:/// URLs. Available in 14 languages: English, Norwegian, Swedish, Danish, German, Spanish, French, Italian, Japanese, Korean, Portuguese, Russian, Vietnamese, and Simplified Chinese.
Local Markdown Viewer
Preview local Markdown files with beautiful GitHub-style rendering Local Markdown Viewer is a Chrome extension that beautifully displays local Markdown (.md / .markdown) files in GitHub style. It automatically generates a table of contents from headings (h1-h6) and allows quick navigation through in-page links. Supports GitHub Flavored Markdown (GFM), including tables, task lists, syntax highlighting, Mermaid diagrams, and mathematical equations. It also features dark mode toggle, print functionality, and HTML export, making it ideal for sharing and distributing documents. No configuration screen - simple design that works right after installation. ■ Markdown Display ・Display in GitHub style with GitHub Flavored Markdown (GFM) support ・Syntax highlighting for 140+ programming languages ・Auto-generated table of contents (h1-h6), resizable TOC width, responsive design ■ Mermaid Diagrams ・Support for flowcharts, sequence diagrams, Gantt charts, and many more diagram types ・Automatic rendering in code blocks ■ Mathematical Equations (KaTeX) ・Support for LaTeX-formatted equations (inline and display equations) ・One-click ON/OFF toggle ■ Dark Mode ・One-click toggle between light and dark modes ・Settings automatically saved ■ Print Function ・One-click printing with TOC and buttons automatically hidden ・Maintains current mode (light/dark) ■ HTML Export Function ・One-click download as standalone HTML file ・Automatically embeds images as Base64 - Local images: Up to 30MB/file - Remote images: Up to 20MB/file (larger ones kept as URLs) ・Viewable in any browser without the extension, ideal for document sharing ・Near-full offline support: Images and Mermaid diagrams work fully offline, KaTeX equations display basic layout offline ■ Multilingual Support ・Supports English, Japanese, and Simplified Chinese 【Scope and Limitations】 ■ Target ・Markdown (.md / .markdown) files opened with file:// protocol ・Locally saved Markdown files ■ Not Applicable ・Markdown pages on the web (GitHub, GitLab, Bitbucket, etc.) ・Preview pages of remote Git repositories ・Other file formats (.txt, .html, etc.) ■ How It Works ・The extension processes only within the displayed page ・Reads Markdown text and converts it to HTML for display ・Never sends file contents to external servers ・Displays images if image links are specified in the Markdown file (Does not access files that are not referenced) ■ Required Setting "Allow access to file URLs" Enabling this setting allows the extension to read local files (file://). ■ Purpose of Permission Use ・Used only to read local Markdown files and convert them to HTML for display ・Used in HTML export function to read image files referenced in Markdown and embed them as Base64 ・Never modifies, deletes, or overwrites file contents ・Read-only, display purposes only ■ About Privacy ・No data collection - does not collect user data or browsing history ・No external transmission - does not send file contents to external servers ・No tracking - no advertisements or access analytics ・Complete local processing - all processing is done within the browser 【Who This Extension Is For】 ・People who write README and technical specifications in Markdown and want to view them easily in a browser ・People who want to safely view documents locally that are not published internally or externally ・People who want to distribute and share Markdown documents as beautiful HTML files ・People who want simplicity and don't want to add settings Q. Does it work on GitHub Markdown pages? A. No. This extension only formats "locally opened .md/.markdown files." It does not interfere with remote pages on the web. Q. Is data sent anywhere? A. No. It is self-contained on the page and does not send data externally. All processing is done within the browser. Q. Can I edit files? A. No. This extension is read-only. It never modifies, deletes, or overwrites file contents. Q. I don't know how to set it up. A. A setup guide page will automatically open upon installation, providing step-by-step instructions. Just follow the guide and enable "Allow access to file URLs" to start using it. Q. What languages are supported? A. English, Japanese, and Simplified Chinese are supported. The display language is automatically selected based on your Chrome browser language settings.
