How can a small tool bring users to the main product?
Choose an independently useful adjacent task, create a voluntary next step, and account for maintenance.
On this page
Direct answer
Side-project marketing offers a useful tool or content product that helps relevant people discover your main product. Focus on audience overlap, independent value and a clear next task. Someone else’s revenue or viral story does not establish near-zero cost: development, model use, maintenance and support can all be real expenses. Judge the project by what it contributes to the core business.
When to use
- The main product has a clear audience and you want product-led acquisition.
- You have a free-tool idea but are unsure whether it distracts from the business.
Step by step
Choose an adjacent task for the main product’s users
Find a small recurring action before purchase or after use: checking, estimating, converting or choosing. Its users should plausibly need the main product. If the traffic is unrelated entertainment, explain why it is worth pursuing. Choose one format: utility, curated directory, template, checklist, calculator or interaction. Compare the output, continuing need for the main product, data expiry and per-run cost; there is no need to build all formats.
Preserve independent usefulness
Let people finish the small task without buying. Make the result clear, accurate and savable rather than a free tool that outputs an advertisement. Voluntary sharing should share a useful result, not force promotion.
Design a natural next step
Near the result, explain which next task the main product solves or offer an explicitly voluntary update subscription. Do not hide results behind forced email collection; explain contact-data use. Make creator and product attribution discoverable. Provide four continuations: a nearby next-task entry, voluntary updates, an optional shareable result card and clear creator/product identification. Preview sharing and its visibility; remove customer names, uploaded content and private links by default. Public share pages and Open Graph must not leak material. A short input -> result -> limitation demo can be reused, subject to each channel’s rules.
Estimate build and ongoing operation
Use familiar technology and minimal scope. Model API, storage and support cost as traffic rises. Set sensible limits and error handling. Reserve time for data updates, failures and questions rather than calling ongoing operation free.
Review contribution to the main business
Track relevant visits, small-task completion, main-product entry, useful subscriptions, payments and valuable citations separately. Exposure can have long-term value if tied to a goal. If results are weak, inspect audience and continuation before creating many more projects. Maintenance includes retired APIs, stale data and complaints; even a tiny tool must continue delivering its promise.
Worked example
Hypothetical example: an email checker for an email service
An email-sending product for developers could offer a tool checking common rendering problems in email HTML, with actionable advice and a natural next step into sending. An unrelated quiz may attract visitors without reaching buyers. For illustration, of 100 deduplicated relevant visitors in a week, 40 finish a check, eight enter the main product, three start sending and one pays. Record 40/100, 8/40, 3/8, 1/3 and total 1/100 with raw counts. If entry fails at configuration, fix continuation; if completers have no sending need, reconsider the adjacent task. These figures are examples, not pass thresholds.
Action checklist
Reusable templates
Side-project marketing brief
Main product and customers:
Adjacent small task:
Independent result:
Why users may need the main product:
Natural continuation location and wording:
Shareable content and privacy boundaries:
Build / operation / maintenance costs:
Observe completion, main-product use and payment:
Conditions for maintaining or stopping:
Small-tool release and continuation acceptance
Format: utility / directory / template / checklist / calculator / interaction
Independent task and acceptable output:
Main-product next task and link:
Voluntary update subscription and notice:
Share preview, fields hidden by default and revocation:
Creator attribution and feedback:
Short demo: input -> actual operation -> output -> limitations -> next step
Per-use cost / daily budget / limits / maintainer:
Relevant visit -> small task -> main-product entry -> core task -> payment: denominator and raw counts for each
Evidence to continue, change continuation or stop:
Pitfalls
- Treating every viral audience as prospective customers.
- Leaking private business data through share images.
- Extrapolating a fixed viral success rate or revenue multiplier from another project’s story.