Webmaster tools that run in your browser

Converters, optimizers and utilities with no server uploads. Fast, private, free.

Tools

Converts Markdown into WordPress-ready HTML for the block editor.

Compresses PNG to JPG with strong optimization and metadata cleanup. Batch, all in-browser.

Resizes images by width, height or percent with quality resampling. Batch, all in-browser.

Converts Russian text to Latin for URL slugs and domains, SEO-friendly for Yandex and Google.

Checks the HTTP response code of pages (200, 301, 404, 500) and the redirect chain. In bulk.

Shows the raw server response and headers per hop with SEO and security diagnostics.

Checks conditional caching: Last-Modified / ETag and the 304 Not Modified response. Clear verdict.

robots.txt with recommended baseline presets for WordPress, Joomla, Shopify, Bitrix and more, plus AI-crawler blocking.

Beautifies HTML, CSS, JS, TypeScript, JSON, YAML and more via Prettier. Right in your browser.

Finds differences between two versions of text or code with line numbers and change highlighting.

Format text like in a word processor and get clean HTML: paragraphs, headings, lists, links — without Word cruft.