Free Online Tools for Students, Work & Everyday Tasks
Find a focused tool for the job you need to finish. OneStepKit brings calculators, converters, PDF utilities, student helpers, work tools, and everyday browser utilities together in one place.
Choose a tool below to open its dedicated workspace. There is no need to turn one page into a catch-all calculator: each tool is built around a specific task and its actual functionality.
Online tools for students
Work through calculations, practice typing, plan study time, and prepare for exams from the browser.
Scientific Calculator
Solve scientific equations, plot live mathematical functions, and use built-in formulas with physical constants for fast homework help.
GPA Calculator
Calculate your semester or cumulative GPA from courses, grades, and credits with weighted and unweighted scale support included.
Attendance Calculator
Calculate how many classes you can miss or must attend to hold your target attendance percentage throughout the semester.
Grade Predictor
Find out what score you need on finals or remaining assignments to reach your target course grade with weighted breakdowns.
Study Planner
Create a daily study schedule from your material size, current progress, and exam dates with balanced sessions and planned breaks.
Exam Countdown
Stay focused with a live countdown timer to your next major test or exam, with custom dates, reminders, and study milestones.
Typing Speed Test
Test and train your typing speed (WPM) and accuracy with a progressive levels system, live graphs, mechanical key sounds, and mistake analytics.
Online Protractor & Angle Finder
Measure angles 0°-360° online using an interactive protractor, upload images to measure angles on pictures, use live camera overlays, gyro sensors, and snap presets.
Tools for work and career tasks
Handle common pay, time, leave, document, and career tasks without jumping between several small tools.
Salary Calculator
Convert annual salary to hourly wage and monthly pay, and explore full breakdowns across weekly, biweekly, and yearly periods.
Timesheet Calculator
Calculate total weekly hours from clock-in and clock-out times, with automatic break deductions and overtime summaries included.
Overtime Calculator
Calculate overtime pay and total gross earnings from regular and overtime hours, with time-and-a-half and double-time rates.
PTO Calculator
Calculate your accumulated Paid Time Off balance, project future accruals by pay period, and estimate payout values easily.
Notice Period Calculator
Calculate your last working day and resignation dates from your notice period, with weekend and holiday adjustments included.
Resume Builder
Create a beautiful, professional resume in minutes and print or save it to PDF in one click, with ATS-friendly templates included.
Finance calculators
Estimate payments, percentages, taxes, tips, salary breakdowns, and other everyday money calculations.
Loan Calculator
Calculate monthly payments, total interest, and full amortization schedules for auto, personal, and standard loans instantly.
Mortgage Calculator
Calculate monthly mortgage payments with principal, interest, taxes, insurance, and HOA, plus full amortization schedules.
Paycheck Calculator
Estimate net take-home pay by calculating federal, state, and FICA tax deductions from gross wages for any pay period.
Percentage Calculator
Calculate percentages, increases, decreases, discounts, and margins instantly with live results and clear formula breakdowns.
Sales Tax Calculator
Calculate sales tax amounts and final prices with US state rates or custom percentages, with itemized receipt breakdowns.
Tip Calculator
Calculate tip amounts and total bills, then split costs fairly across any dining group size with per-person breakdowns.
Retirement Calculator
Project future retirement savings from current contributions, age, and interest rates, with growth charts and goal tracking.
PDF tools in the browser
Use focused PDF utilities for conversion, compression, editing, metadata, images, QR codes, and file organization.
PDF Converter Suite
Convert PDF to Word, Word to PDF, JPG to PDF, PDF to JPG, and apply rotations, passwords, watermarks, or page numbers.
PDF Compressor
Compress PDF files locally to reduce file size. Customize image quality, resolution, and optimization settings.
PDF Editor
Edit PDF text and images locally. Change statements, names, or graphics directly on the page, keeping the exact same font and position.
Merge and Split PDF
Combine multiple PDF files or divide a PDF into individual pages or page ranges, with drag-and-drop ordering and filters.
PDF to Excel Converter
Convert PDF tables into clean Excel spreadsheets (with OCR for scanned bank statements) and convert Excel files into print-optimized PDF documents.
PDF Image Extractor
Scan any PDF and extract all embedded images locally, preview them in a gallery, and download everything as a ZIP archive.
PDF Metadata Stripper
View, edit, and clean metadata like Author, Creator, and Title from PDF files locally in your browser for full privacy.
Dynamic QR Code Studio
Generate dynamic QR codes for products, Wi-Fi, contacts, or documents. Upload cover pages or certificates, and drag-and-drop the QR code to position it freely on the page.
Quick unit and currency conversions
Convert common measurements and currencies with dedicated browser tools for frequent everyday calculations.
Length Converter
Convert length between centimeters, inches, feet, meters, kilometers, and miles instantly with live multi-unit results.
Weight Converter
Convert weight between kilograms, pounds, ounces, grams, and stones instantly with live multi-unit result tables.
Volume Converter
Convert volume between liters, milliliters, gallons, quarts, cups, and ounces instantly with live multi-unit results.
Temperature Converter
Convert temperatures between Celsius, Fahrenheit, and Kelvin instantly with accurate formulas and live multi-scale output.
Currency Converter
Convert currencies between USD, EUR, GBP, CAD, and more with live exchange rates and a clean multi-currency comparison view.
Small tools for everyday tasks
Use timers, decision helpers, random pickers, countdowns, and other simple utilities when you need a quick answer.
Stopwatch & Timer
Track time with a high-precision stopwatch or set custom countdown timers. Supports Picture-in-Picture system-wide overlay, lap splits, and audio alarms.
Internet Speed Test
Measure your internet connection download speed, upload speed, ping latency, and jitter in real-time with an active oscilloscope waveform.
Date Calculator
Add or subtract days, weeks, months, or years from any date to find target dates, with business-day and holiday options.
Date Difference Calculator
Calculate the exact days, weeks, months, and years between two dates, with workday counts and weekend breakdowns included.
Birthday Countdown
Find out exactly how many days, hours, and minutes remain until your next birthday with a live animated countdown timer.
Decision Wheel
Spin a customizable wheel of options to make random, fair decisions for teams, classrooms, giveaways, and everyday choices.
Random Picker
Enter a custom list of options and pick one completely at random, with weights, exclusions, and shuffle modes for fairness.
Tournament Chooser
Set up a custom head-to-head bracket tournament to compare options round by round and crown your ultimate favorite choice.
How to choose an online tool
Start with the task
Choose the tool that matches the calculation, file operation, measurement, or workflow you are trying to complete.
Use the dedicated page
Each linked tool has its own interface and instructions, so the page stays focused on the job rather than presenting a long list of unrelated controls.
Check the tool before relying on results
For financial, academic, workplace, or other consequential calculations, review the assumptions and inputs used by the specific tool.
Need the full site index?
Browse the complete OneStepKit sitemap for all available pages and tools.