Marmite 0.3.0 Release Notes

Wednesday, 22 April 2026 - ⧖ 3 min
🗒️

We're excited to announce Marmite 0.3.0! This release brings a major improvement to code rendering with build-time syntax highlighting powered by Arborium, an enhanced search experience with inline match previews, an updated default font, and several important bug fixes.

🎉 New Features

Build-Time Syntax Highlighting with Arborium

Marmite now uses Arborium for syntax highlighting at build time instead of relying on client-side JavaScript (highlight.js). (#425)

  • Faster page loads — no JavaScript needed for syntax highlighting
  • Tree-sitter based — accurate, language-aware highlighting for 100+ languages
  • Works without JavaScript — highlighted code renders immediately
  • Configurable — enable/disable per site, choose themes

Code blocks in your markdown are automatically highlighted during site generation. No configuration changes needed — it just works.

Thanks to Ian Wagner for this contribution!

Search Match Previews

The search box now displays inline match previews directly in the search results, making it easier to find exactly what you're looking for.

  • Shows up to 3 match snippets by default when matches are found
  • Highlights the matching text within context
  • Configurable number of matches to display
  • Works with the existing search index

🐛 Bug Fixes

Image Orientation Fix

Fixed an issue where images with EXIF orientation metadata were not displayed correctly during resizing and gallery thumbnail generation. Images now respect their EXIF orientation data. (#430, closes #412)

Dark/Light Mode Detection at First Load

Fixed a bug where the dark/light color scheme was not correctly detected on the very first page load, causing a flash of the wrong theme. (#416)

Thanks to Fourflies for this fix!

Content Type Handling on Internal Server

Fixed content type detection on the built-in development server. Previously, some file types were served with incorrect MIME types, which could cause browsers to mishandle them. (#427, closes #413)

Box Shadow Removed from Default Theme

Removed an unintended box shadow artifact from the default theme that appeared across all colorschemes. (#429)

Code Block Styling

Fixed background color and padding on code blocks to ensure consistent styling with the new build-time syntax highlighting.

🎨 Theme & UI Improvements

Atkinson Hyperlegible Next Font

The default font has been updated from Atkinson Hyperlegible to Atkinson Hyperlegible Next (woff2 format), providing improved readability and better font rendering. (#426, closes #423)

📦 Dependency Updates

New Dependencies

  • arborium 2.16.0 — build-time syntax highlighting via tree-sitter

Updated Dependencies

  • chrono: 0.4.42 → 0.4.43
  • clap: 4.5.53 → 4.5.54
  • indexmap: 2.12.1 → 2.13.0
  • serde_json: 1.0.146 → 1.0.149
  • tempfile: 3.23.0 → 3.24.0
  • url: 2.5.7 → 2.5.8

🛠️ Code Quality

  • Pedantic clippy fixes for improved code quality (#428)
  • Additional server tests for content type handling

🌐 Community

  • New showcase entry: Fabiano da Rosa Gomes' personal blog (#424)

Upgrading

To upgrade to Marmite 0.3.0:

# If installed via cargo
cargo install marmite --force

# If installed via pip
pip install --upgrade marmite

# Or use the install script
curl -sSL https://marmite.blog/install.sh | bash

Migration Notes

  1. Syntax highlighting — Client-side highlight.js is no longer loaded by default. If you have a custom theme that depends on it, you may need to adjust your templates.
  2. Font change — The default font file changed from Atkinson-Hyperlegible-Regular-102.woff to AtkinsonHyperlegibleNext-Regular.woff2. Custom themes referencing the old font file should update accordingly.

Thank You

Thanks to all contributors who made this release possible:

  • Ian Wagner — Arborium build-time syntax highlighting
  • Fourflies — Dark/light mode detection fix
  • Fabiano da Rosa Gomes — Showcase contribution

For the complete changelog, see the GitHub releases page.

Please consider giving a ☆ on Marmite Github repository, that helps a lot!

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