Yusuf Bayrak
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    Marketing Tools

    Free tools built for teams running performance marketing. Tag your campaign links correctly, measure the return on your ad spend and make your site legible to AI search engines. Everything runs in the browser — no data leaves your device.

    //Tools in this category

    UTM Link Builder

    Build UTM-tagged links for accurate campaign attribution.

    ROAS Calculator

    Measure Return on Ad Spend and campaign profitability.

    Conversion Rate Calculator

    Turn visitors and conversions into a conversion rate and a gap to your target.

    llms.txt Generator

    Create a free llms.txt so AI bots (ClaudeBot, GPTBot, Perplexity) understand your site.

    //Guide

    Why UTM tracking is the foundation of performance marketing

    UTM parameters are tags that tell your analytics tool exactly which source, channel and campaign a visitor came from. Untagged traffic lands in Google Analytics as "direct" or "referral", and the channel that actually earned the revenue becomes invisible. That is why every measurement chain starts with a correct UTM structure.

    Conversion rate: where traffic turns into quality

    Conversion rate shows what percentage of visitors complete the intended action — a purchase, a form, a demo request. Traffic volume alone means little: lifting conversion rate from 1% to 2% on the same budget produces the same result as doubling traffic, and is usually far cheaper.

    ROAS: reducing spend efficiency to one number

    ROAS (Return on Ad Spend) measures revenue earned per unit of ad spend, which makes campaigns, ad sets and creatives directly comparable. But ROAS is a revenue metric — it ignores your margin. In e-commerce it should always be read next to gross and net profit margin.

    How the tools work together in a campaign analysis

    The flow is: tag your campaign links consistently with the UTM Link Builder. Once the campaign is live, review the source/medium breakdown in analytics and use the Conversion Rate Calculator to compare how each source converts. Finally, run the ROAS Calculator to get spend-to-revenue efficiency, cut the low-ROAS sources and shift budget to the channels that pay back.

    AI search visibility with llms.txt

    A growing share of search traffic now originates in generative engines such as ChatGPT, Perplexity and Claude. The llms.txt Generator produces a standard file that declares which pages you want these bots to read. Added alongside classic SEO, it raises the chance that your brand information is represented accurately in AI answers.

    //Frequently Asked Questions

    How do UTM parameters appear in Google Analytics?

    In GA4 they surface in the Traffic Acquisition reports as session source, session medium and session campaign. utm_source is the source, utm_medium the channel type (cpc, email, social), utm_campaign the campaign name, while utm_content and utm_term break out creative and keyword. Tags are case-sensitive, so "Facebook" and "facebook" create two separate rows.

    What is the difference between ROAS and ROI?

    ROAS measures only revenue against ad spend (revenue / ad spend). ROI accounts for every cost — product, operations, payroll — and measures net profit ((profit - investment) / investment). A 4x ROAS looks strong, but on a 20% margin the campaign may still lose money. Use ROAS for campaign decisions and ROI for business decisions.

    What counts as a good ROAS?

    There is no universal threshold; it depends on your margin. Break-even ROAS = 1 / gross profit margin: at a 25% margin that is 4x, at 50% it is 2x. Retail e-commerce typically treats 3x-5x as healthy, high-margin digital products can work at 2x, and low-margin retail may need 6x or more.

    What is the first step to improving conversion rate?

    Start with measurement integrity: confirm conversion events fire correctly and traffic is separated with UTMs. Then find the page with the highest traffic and lowest conversion, and work on page speed, mobile experience, form field count and a single clear call to action. Validate changes with single-variable A/B tests rather than guesswork.

    //Other tool categories
    SaaS ToolsMeasure the growth and retention metrics of a subscription business.E-Commerce ToolsCalculate true profitability per product and per store.