Tools
Everything runs in your browser. Tax calculators use 2026 federal figures and are estimates, not advice.
Billing
Build a clean invoice in the browser and print or save it as a PDF.
Tax year 2026
Estimate federal income tax, Social Security, and Medicare from a paycheck.
SEO
Draft keyword-first titles and meta descriptions with length checks.
Dev
Pretty-print, convert, and diff JSON or YAML in the browser.
Dev
Test a regular expression against sample text and see every match.
SEO
Append campaign parameters without breaking the rest of the URL.
Writing
Count words, estimate reading time, and extract a heading outline.
Accessibility
Check WCAG contrast for text and large text on a background.
SEO
Mock a social card, or fetch og: tags from a public URL.
SEO
Generate a robots.txt and a starter XML sitemap for a domain.
Data
Paste a CSV and get JSON objects, one row at a time.
Security
Generate random passwords or diceware-style passphrases locally.
Tax year 2026
Compare take-home as a contractor versus a W-2 employee under 2026 federal rules.