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.
Selected. 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.
I need to lead my engineering team
Track delivery, plan architecture, and run healthy team rituals.
Enter your date of birth. See your whole life as one grid of weeks, with weeks lived, weeks ahead, and days to your next birthday.
Price any meeting in salary cost. Enter headcount, pay, and minutes, then share the per-meeting, monthly, and yearly burn.
Pick a wake-up time or bedtime. Get sleep times in 90-minute cycles so you wake between cycles, not mid-cycle.
Enter your body weight and goal. Get your daily protein target in grams plus a per-meal split. Free and instant.
Solve every percentage question — X% of Y, percent change, and reverse percentages — instantly.
Track the 75% attendance rule: percentage so far, bunkable classes, and the recovery plan.
Convert CGPA or SGPA to percentage with official university formulas, plus a credit-weighted CGPA planner.
See exactly what you need on the final exam — or whether your grade is already locked in.
Convert length, weight, temperature, and speed instantly — cm to inches, kg to pounds, and more.
Find the days between two dates, or add and subtract months, weeks, and days calendar-accurately.
Compute your semester GPA on the 4.0 scale with credit weighting and plus/minus grades.
The classic EZ grader: enter questions and wrong answers, get the percent and letter grade instantly.