Free tools
for links, SEO and campaigns

15 free tools to build, check and share better links — from a UTM generator and redirect checker to Open Graph previews and campaign calculators. No sign-up, no limits on the browser tools.

Link tools

Build, check and clean up the links you share.

QR Code Generator QR codes with your logo, colors and frame. No sign-up, no watermark, never expire. UTM Generator Add utm_source, utm_medium and utm_campaign to any URL. Redirect Checker Follow a URL’s redirect chain: each hop, status code and time. Link Analyzer Redirects, title, meta tags, Open Graph, HTTPS, speed and indexability. URL Expander Unshorten any short link and see its destination before you click. URL Encoder and Decoder Percent-encode or decode text and URLs, right in your browser. Slug Generator Turn any title into a clean, SEO-friendly URL slug.

SEO and social sharing

See how a page looks to search engines and in a shared post.

Open Graph Preview See how a URL looks when shared on Facebook, LinkedIn, X and WhatsApp. Social Card Preview Type a title, description and image and preview the share card. Meta Tag Generator Generate title, description, robots, canonical, Open Graph and Twitter tags. Robots.txt Generator Create a robots.txt with rules, sitemaps and AI crawler blocking.

Marketing calculators

Quick math for campaign reports.

CTR Calculator Click-through rate from clicks and impressions, and the clicks you need. ROI Calculator Marketing ROI, ROAS, profit, cost per click and per conversion.

Text and data

Everyday helpers for copy and code.

JSON Formatter Pretty-print, validate and minify JSON, with the error position. Word Counter Count words, characters, sentences and reading time as you type.

Links that report back

The tools are free for good. When you want short links with click analytics, smart routing and your own domain, Letlink is free to start.

Create a free account See what Letlink does

Free tools for links, SEO and campaigns