Henkan – WebP & AVIF Converter

Fast, silent, and incredibly powerful. Welcome to Henkan (Japanese for “conversion”) — the modern way to serve next-generation images in WordPress.

Is your website struggling with slow load times and heavy images?
Henkan is the ultimate, lightweight solution that seamlessly integrates into your WordPress dashboard, converting standard JPEGs and PNGs into highly optimized WebP or AVIF files.

No cloud subscriptions. No monthly limits.

💎 Why Henkan stands out

Most image optimizers rely on slow PHP processing or expensive remote APIs. Henkan is built for raw server performance:

• Native OS Power: We prioritize local system binaries (cwebp, avifenc) for unmatched conversion speed directly on your own server.
• Zero-Config Uploads: Just upload an image. Henkan optimizes it silently in the background.
• One-Click Bulk Mode: Got thousands of old images? Our beautiful, modern dashboard handles your entire library in minutes.

🚀 Feature Highlights

• WebP & AVIF Support: Serve the exact next-gen formats that Google Lighthouse loves.
• Smart Fallbacks: Uses ultra-fast exec() binaries when available, falling back to GD or ImageMagick seamlessly.
• Native <picture> Delivery: Automatically updates your frontend HTML to serve the best format to the right browser.
• Auto-Cache Purge: Fully compatible with WP Rocket, W3 Total Cache, Autoptimize, and LiteSpeed Cache.
• Sysadmin Ready: Built-in WP-CLI (wp henkan convert) to process massive libraries directly from the terminal without PHP timeouts.
• Global Ready: 100% translation-ready (shipped with English, German de_DE, and Japanese ja).

⚙️ System Requirements

To unleash the full speed of Henkan, your server should meet these minimums:
* WordPress: 6.0+
* PHP: 7.4+
* For WebP: cwebp installed on the server (recommended) OR PHP GD extension with WebP support.
* For AVIF: avifenc or ImageMagick (magick/convert) installed OR PHP GD extension with AVIF support.