Free tools
Forty tools, no signup.
These are the calculators and generators our operators use daily, rebuilt so you can use them too. Everything runs in your browser, nothing is stored, and none of them ask for an email address. They are grouped by the decision they help with rather than by format.
Last reviewed 27 August 2026
Cost and hiring
08 tools- Growth cost calculatorHire, agency, or freelancers, with salary loading and founder time counted.
- Founder time cost calculatorPrice the hours you spend on marketing instead of building.
- CAC payback calculatorMonths to recover acquisition cost, calculated on gross margin.
- LTV to CAC calculatorLifetime value against acquisition cost, computed from churn.
- Runway calculatorMonths of runway, and what a new hire does to it.
- Content cost calculatorWriting, editing, and the distribution most budgets forget.
- SEO ROI calculatorPipeline value of organic search against what it costs to build.
- Paid CAC calculatorAd spend to cost per customer, checked against margin.
Growth maths
08 tools- MRR growth projectorCompound your growth rate forward and see what two points is worth.
- Rule of 40 calculatorGrowth plus margin against the benchmark, with the cost of each lever.
- Churn impact calculatorLifetime, lifetime value, and the revenue treadmill churn puts you on.
- Pipeline target calculatorAn ARR goal converted into leads and meetings per person per week.
- A/B test significance calculatorTwo proportion z test with the p value, and what it actually means.
- A/B test sample size calculatorVisitors per variant, and how many weeks that is at your traffic.
- Conversion funnel calculatorStage by stage volumes, the biggest leak, and what fixing it is worth.
- First 1000 users plannerA user target converted into weekly activity per channel, with a reality check.
Search and AI search
08 tools- llms.txt generatorA valid llms.txt from your page list, with honest context on adoption.
- robots.txt generatorAllow or block each AI crawler by its real user-agent token.
- Meta tag generatorFull head block with escaping, plus a length check on every field.
- Schema markup generatorValid JSON-LD for six common types, with required fields enforced.
- Title tag checkerA text SERP preview with length verdicts and a width estimate.
- Keyword density analyzerWord count, term frequency, top terms, and an honest verdict.
- AI visibility prompt packA test protocol for checking whether AI assistants mention you.
- SEO timeline estimatorA month-by-month organic projection built from stated assumptions.
Content and writing
08 tools- Readability scorerFlesch Reading Ease and grade level, with the worst sentence flagged.
- Headline analyzerFive structural checks and a rewrite instruction for each one you fail.
- Jargon and buzzword checkerFlagged phrases listed with position and a plain English replacement.
- Reading time calculatorReading time with the words-per-minute assumption visible and editable.
- Content brief generatorQuery, audience, and angle in. A copyable writer brief out.
- Tweet thread splitterSentence-safe thread splitting with an editable limit and numbering.
- LinkedIn post formatterThe see-more cut, the character limit, and hashtag count in one view.
- Email subject line testerTruncation points, filter-bait words, and capitals, checked before you send.
Distribution
08 tools- Subreddit finderCurated subreddits by category, with each community's self-promotion posture.
- UTM builderTagged links, properly encoded, with the mistakes flagged before you ship them.
- Channel pickerTwo or three channels to run, and the ones to deliberately skip.
- Posting cadence plannerWhat your weekly hours really buy, per channel, replies included.
- Cold email spam checkerTrigger words, links, capitals, and length, with specific fixes.
- Launch checklist generatorAn ordered checklist counting back from launch day, plus the week after.
- Social character counterOne post, every platform limit, and the point where each one truncates.
- Growth plan generatorA named, week by week 30 day plan, including what not to do.
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