💻 Web & Developers: 16 free online tools

UTM, short links, SEO, encoding, colors and developer tools.

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🔗UTM BuilderCreate UTM links to track Facebook, Instagram, TikTok, Google Ads, email or QR code campaigns in Google Analytics 🚀Internet Speed TestMeasure your connection speed 📍What Is My IPSee your public IP address, its version (IPv4 or IPv6), your internet provider and approximate location 🔣URL Encoder / DecoderEncode or decode a URL or parameter (percent-encoding)🧬Base64 Encoder / DecoderConvert text or images to Base64 and decode Base64 back to text #️⃣Hash GeneratorInstantly compute MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes of any text 🆔UUID GeneratorGenerate random UUID v4 (GUID) in bulk, lowercase, uppercase or without hyphens, ready to copy 🧪Regex TesterTest regular expressions live 📦Code MinifierShrink CSS, JavaScript, HTML or JSON by removing whitespace and comments to speed up your site 🔀CSV to JSONConvert a CSV (Excel) file to JSON or JSON to CSV, with delimiter choice (comma, semicolon, tab)🎨Color ConverterConvert a color between HEX, RGB, HSL and CMYK, generate its shades and check its contrast for accessibility 🌈CSS Gradient GeneratorCreate a 2 or 3-color CSS gradient, set the angle and type, copy the code or download it as a PNG image 💬WhatsApp Link GeneratorGenerate a clickable WhatsApp link to your number with a pre-filled message for your website, Instagram or ads 🔟Binary / Hex ConverterConvert a number between binary, octal, decimal, hexadecimal and base 36, and translate text to binary ✂️URL ShortenerShorten links for free, customize them, add UTM tags per channel (Facebook, Instagram, TikTok, WhatsApp…) and track clicks by source, country and device 🔎SERP snippet previewSee how your page looks on Google (desktop and mobile), Facebook, WhatsApp and LinkedIn, with ideal title and meta description length

Web tools for marketers and developers

Build a campaign URL with UTM parameters and shorten it with click tracking, preview how a page looks in Google, create a WhatsApp link with a pre-filled message, test your internet speed or find your IP address: the Web category serves marketers and developers alike.

On the technical side, you get URL and Base64 encoders, hash and UUID generators, a regular-expression tester, a CSS/JS/HTML minifier, a CSV-to-JSON converter, colour and number-base converters and a CSS gradient generator with ready-to-copy code.

UTM best practices

Always use lowercase values without spaces (for example utm_source=facebook, utm_medium=paid_social) and keep the same naming from one campaign to the next for clean Google Analytics reports.

Frequently asked questions

Is the link shortener free?

Yes, with custom aliases, click statistics by country, device and source, and editable destinations.

Is data typed into the encoders sent anywhere?

No, encoding, hashing and minification run in your browser.

Is the speed test reliable?

It measures throughput to the nearest Cloudflare network location; run several tests for a reliable average.

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