A set of free utilities for webmasters, marketers, and document work. No sign-up — everything runs in your browser.
Tools for crawl control and multilingual setup: robots.txt, Sitemap, hreflang.
Visual robots.txt builder: Allow/Disallow per bot, Sitemap URL. Manage crawl budget, avoid accidental blocking. Download in browser.
Open →Generate identical hreflang link blocks for multilingual pages. Google-compliant, x-default support.
Open →SERP preview, keyword density analysis, and text typography for SEO and readability.
Interactive Google snippet emulator: pixel-width Title and Description preview, keyword highlighting, desktop/mobile view.
Open →Analyze keyword density and n-grams with stop-word filtering for 6 languages. Unigrams, bigrams, trigrams in browser.
Open →WebP image optimization and color palette generation for interfaces, landing pages, and UI kits.
Compress JPG and PNG to WebP format right in your browser. Speed up your site without losing visual quality.
Open →Generate interface palettes with OKLCH, HSL and HSV, fine-tune shades manually, check contrast, and export to Tailwind or CSS.
Open →Convert HEX, RGB, CMYK, HSL, HSV, LAB, HWB and OKLCH with Tailwind, Material and Web Safe palettes.
Open →Microdata and social previews: JSON-LD and Open Graph for rich snippets.
Tools for AI search and AI Overviews: llms.txt and content structure validation.
Funnel and ROI calculators, VAT, margin, invoice, UTM, QR, signatures, and privacy policy tools.