How AllYouNeed is built and verified

AllYouNeed is an independent project run by one developer. This page describes how the tools and content actually get built — what runs in your browser, how each tool is verified, and what the site does and doesn't do.

What runs in your browser

Every tool on this site runs entirely client-side: the inputs you type and any files you load are processed in your browser and never reach a server. There is no upload step, no account, no server-side computation in the tool path.

Analytics waits for a known permissive signal; advertising waits for known signals and passes rejection to Google for any restricted serving it permits. A missing signal does not enable these services. Consent management itself contacts Google before a choice. See privacy.

What's on the site

AllYouNeed mixes several tool categories on one domain — utility calculators, text and unit utilities, date/time tools, fitness calculators (BMI, TDEE, body fat, water intake, ideal weight), QR codes, developer cheatsheets, and basic format converters. Each category has different requirements; the bar applied below adapts to each.

How tool reliability is verified

Automated checks cover specific formulas and journeys; they do not certify every possible input or use of the catalog. The build date indicates publication, not a guarantee that every tool was verified at that moment.

How content is written

Code references and guides link their sources where relevant. Tests check specific cases; they are not a complete certification of standards, versions or professional suitability.

Long-form guides under /docs/ are drafted with AI assistance and lightly reviewed before publishing. The technical facts in those guides — what an RFC says, how a formula derives — are independently verifiable.

Comparison pages ("X vs Y") were previously published with light review. Those pages have been removed because the project couldn't maintain the factual bar they required without becoming a competitor-review site, which isn't what AllYouNeed is. If a comparison page redirected you here, please use the actual products to compare them.

What the site doesn't do

• Paid placements, sponsored editorial, or guest posts. AdSense ads are clearly marked Sponsored and separate from editorial.
• Paraphrase competitor blog posts.
• Make health claims dressed up as advice. Fitness calculators are calculators; each names what it is not for.

Fitness content

Health calculators offer educational estimates with limits of applicability. Read each tool’s formula and limitations; we do not treat their methods as interchangeable or attribute a generic weight-based rule to an official recommendation.

Every fitness page carries a shared educational disclaimer; tools touching sensitive contexts add specifics — kidney disease and pregnancy for water intake, eating disorders for calorie tools, athletic body composition for BMI.

How content stays current

We review pages and tests when correcting errors or changing a tool. We do not promise immediate updates for every external change.

Reporting errors

To report an error, include the tool, a non-private example and expected result at support@allyouneed.dev. We do not promise a fixed response time.

Funding and monetization

AllYouNeed accepts no payment for tool listings, no affiliate revenue, and no sponsored editorial content. Monetization is via Google AdSense display ads (where approved) and occasional Buy Me a Coffee tips. Ad slots are clearly marked Sponsored and separate from the rest of the page.