SEO

Favicon Generator

Upload an image and get a full favicon set (16–512px, .ico, web manifest) plus ready-to-use HTML for <head>.

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Meta Tags / Open Graph Generator

Generate HTML meta tags for SEO, Open Graph (Facebook), and Twitter Card — with a live share-card preview.

robots.txt Validator

Check robots.txt — User-agent group structure, directives, and a path tester for allow/block decisions.

sitemap.xml Validator

Check sitemap.xml — required fields, date formats, sitemaps.org limits, duplicate URLs.

sitemap.xml Generator

Build a sitemap.xml from a list of URLs — with lastmod/changefreq/priority, validation, and duplicate removal.

Other tools

Unicode Escape

Encode and decode Unicode escape sequences — characters as \uXXXX and back.

Case Converter

Convert text or an identifier into every common naming style at once — camelCase, snake_case, kebab-case, and more. Recognizes word boundaries in camelCase/PascalCase, acronyms (XMLParser → XML + Parser), and around digits.

Bitwise Operations

AND/OR/XOR/NAND/NOR/XNOR/NOT and shifts on integers of a given width (8/16/32/64 bits) in any number base.

TOTP Generator/Verifier

Time-based one-time passwords (TOTP, RFC 6238) — generate the current code from a secret and verify an entered code with clock-drift tolerance.

Sort & Dedupe Lines

Sort lines of text alphabetically, remove duplicates, empty lines, and extra whitespace.

HTML Entities Encode/Decode

Encode and decode HTML entities — safely display special characters on a page.