Use free calculators, converters, and generators. All tools process data locally in your browser.
Choose a workflow to find tools for your task.
Pick a goal to filter the tools. All tools stay in your browser.
I need to inspect, fix, or convert data fast
Format, decode, and convert data. JSON, XML, YAML, CSV, encoders, and unit converters.
I need to validate and test before shipping
Check code, APIs, regex, and specs. Find issues before your users do.
I need to design a UI that looks pro
Build palettes, shadows, and gradients. Ship a clean interface.
I need to send money or run a business
Price your work and plan your money. Invoices, pricing, taxes, loans, and unit economics.
I need to get hired — or hire well
Tune your resume, plan interviews, grade job briefs, and run hiring loops.
I need answers fast
Get quick answers. Split bills, plan sleep, pace learning, and count time and money.
I need to generate content, docs, and boilerplate
Create README files, robots.txt, social images, QR codes, invoices, and styled text.
Selected. I need to lead my engineering team
Track delivery, plan architecture, and run healthy team rituals.
Calculate error budgets and reliability targets. Know exactly when to freeze releases vs ship features.
Document critical architecture decisions effortlessly with structured records.
Evaluate your repository's Developer Experience and spot friction points for new hires.
Detect heavy dependencies, deprecated packages, and bloat in your package.json.
Generate a production-grade CI pipeline checklist and GitHub Actions workflow in seconds.
Calculate revenue lost from slow load times. See the business value of every 100ms improvement based on Deloitte benchmarks.
Measure global API response times. Visualize TTFB, DNS, and download speeds.
Get tailored tech stack recommendations for your next project based on scale, team size, and goals.
Choose the right state manager (Redux, Zustand, Context) based on your app complexity.
Assess the maturity of your design system. Check coverage of tokens, components, and docs.
Calculate revenue loss from unfilled roles. Supports USD, EUR, GBP, INR, and more.
Visualize your hiring pipeline, spot bottlenecks, and compare against industry benchmarks.
Estimate web development costs, timeline, and payback period. Supports 50+ currencies with tech stack recommendations.
Score your team on the four DORA metrics — deployment frequency, lead time, change failure rate, MTTR — and benchmark to Elite/High/Medium/Low.
Draft measurable objectives, key results, owners, and quarterly progress scorecards.
Evaluate React Server Components, streaming SSR, edge runtime, and Server Actions for high-scale apps.
Diagnose failing INP, LCP, CLS, and TBT bottlenecks with drop-in React and Next.js code refactors.
Staff-level frontend system design blueprints with state architecture, network protocols, and TypeScript code.