Generators & Converters

Free online generators for QR codes, passwords, UUIDs, favicons, robots.txt, sitemaps, .env and .gitignore files.

Generators are the tools that produce a file or a value you then take somewhere else: a QR code you print, a favicon set you drop into a project, a robots.txt you upload to a server. Because the output has to be exactly right, these tools show you what they will emit before you copy it, and most of them validate the input as you type so you find the problem here rather than after deployment.

Start with the QR code maker if you need a link, Wi-Fi network or vCard in scannable form, and with the password generator if the job is credentials - it uses your browser's cryptographic random source, not Math.random(). For web projects the usual trio is favicon generator, robots.txt generator and sitemap generator, in that order: the favicon set covers the awkward old-IE and apple-touch cases, the robots file decides what crawlers may read, and the sitemap tells them what to read first.

The mistakes worth avoiding: generating a robots.txt that disallows the paths you want indexed, shipping a 16x16-only favicon and letting browsers upscale it, and pasting a .gitignore from another language without checking whether it ignores your build output directory by accident. Each tool explains the consequence of the option you just ticked rather than leaving you to discover it in production.

13 tools in this category

• QR Code Generator — Generate QR codes for links, Wi-Fi and vCards.
• Password Generator — Strong random passwords with a live strength meter.
• UUID Generator — Generate crypto-secure UUIDs in bulk.
• UUID Validator & Parser — Validate & parse UUIDs: version, variant, fields, bulk.
• Color Converter & Palette Generator — Convert HEX, RGB, HSL and CMYK, build palettes.
• CSV Viewer & Converter — View, sort & convert CSV to JSON in your browser.
• WAV to MP3 Converter — Convert WAV or any audio to MP3.
• Favicon Generator — Create a full favicon set (16–512px PNGs, multi-size .ico, apple-touch-icon, PWA
• Sitemap XML Generator — Build, validate & split XML sitemaps in your browser.
• robots.txt Generator — Build & validate robots.txt with live preview.
• HTML Meta Tag Generator — Build title, description, canonical, robots & viewport tags with live SERP previews
• .env File Validator — Validate .env files: malformed lines, duplicates, CRLF/BOM, unquoted secrets & $-traps.
• Gitignore Generator — Build .gitignore for 80+ languages, IDEs, OSes & project types, with custom-rule checks.

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