{"id":289645,"date":"2026-03-19T13:59:00","date_gmt":"2026-03-19T13:59:00","guid":{"rendered":"https:\/\/de.wordpress.org\/plugins\/sl-image-optimizer\/"},"modified":"2026-03-19T13:58:36","modified_gmt":"2026-03-19T13:58:36","slug":"lehmannlabs-webp-optimizer","status":"publish","type":"plugin","link":"https:\/\/vi.wordpress.org\/plugins\/lehmannlabs-webp-optimizer\/","author":23465276,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_crdt_document":"","version":"1.0.0","stable_tag":"1.0.0","tested":"6.9.4","requires":"6.2","requires_php":"7.4","requires_plugins":null,"header_name":"LehmannLabs WebP Optimizer","header_author":"LehmannLabs","header_description":"Free WordPress image optimization with backups, optional resize, WebP generation, and frontend WebP delivery. No ads, no tracking, no paid upsells.","assets_banners_color":"305e3e","last_updated":"2026-03-19 13:58:36","external_support_url":"","external_repository_url":"","donate_link":"","header_plugin_uri":"https:\/\/lehmannlabs.dev","header_author_uri":"","rating":0,"author_block_rating":0,"active_installs":0,"downloads":58,"num_ratings":0,"support_threads":0,"support_threads_resolved":0,"author_block_count":0,"sections":["description","installation","faq","changelog"],"tags":{"1.0.0":{"tag":"1.0.0","author":"lehmannlabs","date":"2026-03-19 13:58:36"}},"upgrade_notice":{"1.0.0":"

Initial stable release.<\/p>"},"ratings":[],"assets_icons":{"icon-128x128.png":{"filename":"icon-128x128.png","revision":3486540,"resolution":"128x128","location":"assets","locale":""},"icon-256x256.png":{"filename":"icon-256x256.png","revision":3486540,"resolution":"256x256","location":"assets","locale":""}},"assets_banners":{"banner-1544x500.png":{"filename":"banner-1544x500.png","revision":3486540,"resolution":"1544x500","location":"assets","locale":""},"banner-772x250.png":{"filename":"banner-772x250.png","revision":3486540,"resolution":"772x250","location":"assets","locale":""}},"assets_blueprints":{},"all_blocks":[],"tagged_versions":["1.0.0"],"block_files":[],"assets_screenshots":[],"screenshots":{"1":"Settings page","2":"Tools page with progress and preview","3":"Site Health WebP support test"},"jetpack_post_was_ever_published":false},"plugin_section":[],"plugin_tags":[76538,163,187,247,15376],"plugin_category":[50,52,54],"plugin_contributors":[258118],"plugin_business_model":[],"class_list":["post-289645","plugin","type-plugin","status-publish","hentry","plugin_tags-elementor","plugin_tags-images","plugin_tags-optimization","plugin_tags-performance","plugin_tags-webp","plugin_category-media","plugin_category-performance","plugin_category-security-and-spam-protection","plugin_contributors-lehmannlabs","plugin_committers-lehmannlabs"],"banners":{"banner":"https:\/\/ps.w.org\/lehmannlabs-webp-optimizer\/assets\/banner-772x250.png?rev=3486540","banner_2x":"https:\/\/ps.w.org\/lehmannlabs-webp-optimizer\/assets\/banner-1544x500.png?rev=3486540","banner_rtl":false,"banner_2x_rtl":false},"icons":{"svg":false,"icon":"https:\/\/ps.w.org\/lehmannlabs-webp-optimizer\/assets\/icon-128x128.png?rev=3486540","icon_2x":"https:\/\/ps.w.org\/lehmannlabs-webp-optimizer\/assets\/icon-256x256.png?rev=3486540","generated":false},"screenshots":[],"raw_content":"\n

LehmannLabs WebP Optimizer is focused on one core goal: faster page load times.<\/p>\n\n

The plugin converts your WordPress images to WebP and serves WebP files on the frontend whenever available. This reduces image payload and helps improve Core Web Vitals and user experience.<\/p>\n\n

It was developed for WordPress websites built with Elementor and works well with typical Elementor image output (including image widgets, carousels, and background image use cases).<\/p>\n\n

Unlike many plugins in this category, LehmannLabs WebP Optimizer is fully free to use, with no advertising, no tracking, and no premium upsells.<\/p>\n\n

Tested with:\n- Elementor v3.35.6\n- Elementor Pro v3.35.1<\/p>\n\n

Key benefits:\n- Faster frontend image delivery through WebP replacement\n- Completely free, with no ads and no paid upgrades\n- Optional auto-conversion on upload\n- Batch conversion for existing media\n- Safe fallback strategy and backup\/restore tools\n- No external API calls, no tracking<\/p>\n\n

Main features:\n- WebP generation for full-size and intermediate image sizes\n- Output modes:\n - Picture mode (recommended): WebP source with fallback image\n - Direct mode: direct URL\/srcset replacement to WebP when available\n- Original image backup to uploads\/slimage-backup\/YYYY\/MM\/<\/code>\n- Optional resize with configurable maximum edge length\n- Batch tools in wp-admin:\n - Scan & Optimize\n - Delete WebP Files\n - Restore Originals\n- Site Health integration for WebP capability checks<\/p>\n\n\n

    \n
  1. Upload the plugin folder to \/wp-content\/plugins\/lehmannlabs-webp-optimizer\/<\/code>.<\/li>\n
  2. Activate the plugin through the \"Plugins\" screen in WordPress.<\/li>\n
  3. Open LehmannLabs WebP > Settings<\/code> and review options.<\/li>\n
  4. Use LehmannLabs WebP > Tools<\/code> for batch actions.<\/li>\n<\/ol>\n\n\n
    \n

    Are originals deleted?<\/h3><\/dt>\n

    No. Originals are preserved in uploads\/slimage-backup\/<\/code> while backup is enabled.<\/p><\/dd>\n

    What happens if WebP is not supported on the server?<\/h3><\/dt>\n

    The plugin skips WebP generation and reports this in Site Health and admin notices.<\/p><\/dd>\n

    Can I restore optimized files?<\/h3><\/dt>\n

    Yes. You can restore per attachment or in batches.<\/p><\/dd>\n

    Can I delete the backup folder manually from the plugin?<\/h3><\/dt>\n

    Yes. Use the \"Delete Backup Now\" button in LehmannLabs WebP > Settings<\/code>.<\/p><\/dd>\n

    Does it work with Elementor?<\/h3><\/dt>\n

    Yes. The plugin was developed for WordPress with Elementor and is optimized for common Elementor image output patterns.<\/p><\/dd>\n\n<\/dl>\n\n\n

    1.0.0<\/h4>\n\n
      \n
    • Initial release<\/li>\n
    • Upload optimization with backup and optional resize<\/li>\n
    • WebP generation for full and intermediate sizes<\/li>\n
    • Picture and direct output modes<\/li>\n
    • Batch scan\/optimize, restore, and delete WebP tools<\/li>\n
    • Progress UI with status and remaining preview<\/li>\n
    • Single media restore action<\/li>\n
    • Backup cleanup button in settings<\/li>\n
    • Site Health WebP support test<\/li>\n<\/ul>","raw_excerpt":"Improve page speed in WordPress with a free WebP optimizer for Elementor workflows. No ads, no tracking, no paid upsells.","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/vi.wordpress.org\/plugins\/wp-json\/wp\/v2\/plugin\/289645","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vi.wordpress.org\/plugins\/wp-json\/wp\/v2\/plugin"}],"about":[{"href":"https:\/\/vi.wordpress.org\/plugins\/wp-json\/wp\/v2\/types\/plugin"}],"replies":[{"embeddable":true,"href":"https:\/\/vi.wordpress.org\/plugins\/wp-json\/wp\/v2\/comments?post=289645"}],"author":[{"embeddable":true,"href":"https:\/\/vi.wordpress.org\/plugins\/wp-json\/wporg\/v1\/users\/lehmannlabs"}],"wp:attachment":[{"href":"https:\/\/vi.wordpress.org\/plugins\/wp-json\/wp\/v2\/media?parent=289645"}],"wp:term":[{"taxonomy":"plugin_section","embeddable":true,"href":"https:\/\/vi.wordpress.org\/plugins\/wp-json\/wp\/v2\/plugin_section?post=289645"},{"taxonomy":"plugin_tags","embeddable":true,"href":"https:\/\/vi.wordpress.org\/plugins\/wp-json\/wp\/v2\/plugin_tags?post=289645"},{"taxonomy":"plugin_category","embeddable":true,"href":"https:\/\/vi.wordpress.org\/plugins\/wp-json\/wp\/v2\/plugin_category?post=289645"},{"taxonomy":"plugin_contributors","embeddable":true,"href":"https:\/\/vi.wordpress.org\/plugins\/wp-json\/wp\/v2\/plugin_contributors?post=289645"},{"taxonomy":"plugin_business_model","embeddable":true,"href":"https:\/\/vi.wordpress.org\/plugins\/wp-json\/wp\/v2\/plugin_business_model?post=289645"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}