No-Code Website Building

Live Markdown editor with real-time HTML preview. Supports headings, bold, italic, links, code blocks, tables, and blockquotes.

Plan remaining drafting work from your editorial word target, current count and measured writing pace, with no invented SEO length requirement.

Compare two opaque sRGB colors using WCAG text contrast ratios. See precise ratio estimates, unrounded threshold decisions and clear invalid-color feedback.

Parse HTTP header blocks into ordered JSON with duplicate fields intact, default sensitive-value redaction, line errors and protocol-review warnings.

Simple in-browser notepad with auto-save. Write quick notes that persist in your browser. Download as text file. No signup needed.

Model an hourly revenue floor from owner pay, overhead, a user-entered annual reserve, billable capacity, and target operating margin.

Allocate the 168 hours in a seven-day week across work, commute, rest, care and other activities, then save observed and proposed schedules.

Model the standard Schedule SE Social Security and Medicare components from explicit current factor, wage-base, wage, and rate inputs.

Apply entered in-network deductible, coinsurance, copays, and out-of-pocket maximum terms to an entered allowed-charge scenario, plus premiums.

Calculate gross profit and operating profit or loss from net revenue, cost of sales, and operating expenses for one consistent period.

Compare two complete quotes by dividing each total cost by its whole-unit quantity, with a signed per-unit difference and no invented scale assumptions.

Include unit costs, order costs and payment fees in a contribution-based price floor, then test operating profit and minimum whole-order sales targets.