Changelog

All notable changes to CodePrettify are documented here.

v1.0.3 Latest March 14, 2026

Prism.js Auto-Highlighting — Fixed Prism.js running highlightAll() on every website, which could break syntax highlighting on sites like GitHub, Stack Overflow, and MDN. Prism is now set to manual mode so it only highlights within the extension's own container.
CSS Leaking to Other Sites — Fixed unscoped .token CSS rules (syntax highlighting colors) being injected globally on all pages. All token styles are now scoped under #pretty-container to prevent interference with other websites.
View Source Interference — Added protocol guards to prevent the extension from activating on view-source:, chrome:, and about: pages.

v1.0.2 January 29, 2026

Content-Type Detection — The extension now detects file types using HTTP Content-Type headers in addition to URL file extensions. This enables proper formatting of API endpoints like https://api.github.com/users/github that serve JSON without a .json extension.

RSS Code Folding — Fixed collapse/expand functionality for RSS/XML files not working correctly. Rewrote the fold system to use data attributes and indexed line access, matching the JS handler approach.
Toolbar Buttons — Fixed collapse/expand buttons in the toolbar not appearing or disappearing dynamically when toggling the code folding setting. Buttons are now always created for supported file types and show/hide based on settings.
Page Rendering — Fixed an issue where normal websites could turn white when the extension loaded. Added a pre-check loader that only applies content hiding for supported file types.

v1.0.1 January 28, 2026

RSS/Atom Feed Support — New file format support for .rss and .atom files with syntax highlighting, auto-formatting, code folding for XML elements, clickable URLs (with entity decoding), and feed statistics (tags, attributes, namespaces, etc.).
Code Folding (JS) — Collapse/expand functions, classes, objects, and code blocks. Hover over a foldable line to see the fold toggle. Use Collapse All / Expand All buttons in the toolbar. Can be enabled/disabled in settings.
Bracket Matching (JS) — Hover over {, (, or [ to highlight its matching pair. Both brackets are highlighted with visual feedback. Can be enabled/disabled in settings.
Code Folding Setting (JSON) — Added a setting to enable/disable the collapsible JSON feature.
Code Statistics Panel — View file size, line count, and character count. Language-specific stats: JSON (object depth, key count, array sizes), JS (function count, variable count), CSS (selector count, rule count, media queries).
Hex/RGB Color Preview (CSS) — Color swatches appear next to color values. Click to copy color in different formats. Includes a color picker.
Breadcrumb Navigation (JSON) — Shows path like root › data › users[0] › name when hovering/clicking. Click any breadcrumb to jump to that level.
Clickable URLs & Imports — URLs in strings and import/require paths are now clickable links.

Unified Layout — Adjusted all modal windows, toolbars, and UI elements to use CSS variables instead of hardcoded colors for consistent theming.
Enhanced Syntax Checker — Removed vanilla JavaScript validation and replaced it with a sandboxed environment for safer and more accurate syntax checking.

RSS Feed Rendering — Fixed issue where RSS feeds opened in a background tab (XHTML mode) failed to render correctly or caused high CPU usage. Now waits for tab visibility before rendering.

v1.0.0 Initial Release January 2026

Auto-Format: Automatically detects messily formatted code and beautifies it with your preferred indentation
Intelligent Minification Detection: Analyzes code density—if a file is minified, it formats it automatically; if it's already clean, it adds syntax highlighting
Local File Support: Works seamlessly on web URLs and local files (file://) opened in the browser
Zero-Flash Loading: Engineered to prevent raw text from flashing before the beautifier loads

Don't just read code—debug it. CodePrettify scans your files for common errors with instant feedback.

JSON: Detects syntax errors and provides the exact line number
JavaScript: Identifies mismatched braces, brackets, and common typos
CSS: Validates structural integrity
Instant Feedback: Invalid code triggers non-intrusive toast notifications with error details

Collapsible Data: Fold arrays and objects to navigate large datasets easily
Smart Previews: See summary info (e.g., Array(5) or {3 keys}) when blocks are collapsed
Clickable Links: URLs inside JSON strings automatically become clickable hyperlinks
Expand/Collapse All: Dedicated buttons to manage massive JSON files instantly

Advanced Search: Custom search bar (Ctrl+F) with result counting and navigation—works even on huge files
Go To Line: Jump straight to specific lines (Ctrl+G), perfect for debugging stack traces
Export Options: Download your file in three formats: Original, Formatted, or Minified
Copy to Clipboard: Quick one-click copy functionality

Themes: Choose between Light, Dark, or Auto (syncs with system)
Format Settings: Adjustable font size (10-24px), indentation (2 or 4 spaces), and line numbers
Privacy First: 100% client-side—your code never leaves your browser

Supports 14 languages including English, Norwegian, German, Spanish, and Chinese.