Email Subject Line Tester
Score email subject lines – length, spam triggers, emoji count, inbox preview. Tips to improve open rates. Free, offline, client-side, instant, secure.
Marketing tools cover the link-hygiene and campaign-tracking jobs that sit between copywriting and publishing. Five live utilities for affiliate publishers and marketers, starting with a link cloaker that turns long, ugly tracking URLs into branded short links plus the redirect code for whatever server fronts your site. A roadmap of UTM builders, QR generators, and campaign analyzers is already queued. For today, if the problem is an affiliate link that looks like it was written by an accountant with a stuck keyboard, this is where to start.
Score email subject lines – length, spam triggers, emoji count, inbox preview. Tips to improve open rates. Free, offline, client-side, instant, secure.
Build an HTML email signature – name, contact details, brand color. XSS-safe escaping. Free, offline, client-side, instant, secure.
Work out customer lifetime value two ways – classic purchase math or SaaS churn – with NPV discounting, LTV:CAC ratio, and payback charting.
Calculate CPM, CPC, CPA, CTR, conversion rate, ROAS and ROI for ad campaigns. 8 currencies, print, CSV export, shareable URL. Free, client-side.
Cloak long affiliate URLs with branded short links. Generate redirect codes for Apache, nginx, and JavaScript. Free, offline, and secure.
amazon.com/dp/B08XYZ?tag=yoursite-20&linkCode=ll1&ref=abcd... with a clean branded short link such as yoursite.com/go/item: Affiliate Link Cloaker..htaccess, nginx rewrite, or JavaScript client-side redirect) so the short link actually works on day one.Reach for marketing tools when the job is preparing a link, a tracking snippet, or a campaign asset for publication. If the job is inspecting meta tags, schema, or sitemap output, the SEO tools are closer. For URL-encoding or decoding, percent-encoding, or inspecting query strings, the developer category has the low-level utilities.
| Tool | What it does | When to use |
|---|---|---|
| Affiliate Link Cloaker | Takes a long affiliate URL, a desired branded short path, and a redirect type. Generates the short URL plus server config for Apache, nginx, or JavaScript. Preserves all tracking query parameters through the redirect. | Cleaning up a batch of Amazon Associates links before publishing a product roundup; generating redirect rules for a WordPress site where plugins feel like overkill; creating a set of branded short links that survive if the underlying affiliate program changes. |
The category expands alongside the content. Tools already scoped for upcoming releases, grouped by job:
Each tool will appear at /tools/{slug}/ and get listed here automatically as it launches.
Most major networks permit cloaking as long as tracking parameters pass through cleanly and the final destination matches the affiliate offer. The Affiliate Link Cloaker preserves every query parameter by default so commission tracking continues to work. Amazon Associates, ShareASale, and Impact all allow branded short links. Check specific program terms before a large campaign.
Apache .htaccess works on almost every shared host (Hostinger, Bluehost, SiteGround). nginx rewrite blocks fit VPS, containers, and most modern hosting stacks. JavaScript redirects run client-side with no server config at all, useful on static sites or when server access is limited. For SEO value, 301 server redirects beat JavaScript redirects because search engines pass authority through them.
Yes. The generated redirect uses a 301 or 302 and keeps the full query string intact, so the affiliate cookie is still dropped at the destination. If the network uses a pixel or postback instead of a cookie, the same passthrough works because the final URL is unchanged from the user's perspective.
No. Affiliate Link Cloaker generates everything in the browser. The long URL, the short path, and the redirect snippet never touch a server.
Marketing work often spills into neighboring toolkits. The SEO category holds tools for meta tag generation, schema markup, and sitemap inspection that complement link strategy. The developer category covers URL encoding, decoding, and JSON work for API-driven campaign setups. For cleaning and formatting ad copy or email subject lines, the text tools handle case conversion, character counting, and formatting.