Fast, private, client-side tools and calculators for everyday work. Zero data sent to servers.
Showing 91 tools · Run 100% locally in your browser
Calculate gross profit margin, net profit margin, and markup percentages from revenue and cost of goods sold.
Compress and reduce PDF file sizes with target presets (100KB, 200KB, 500KB) and custom quality sliders.
Combine multiple PDF documents into a single unified PDF with custom file ordering.
Split PDF documents into individual pages, custom page ranges (e.g. 1-2, 3), or fixed intervals.
Permanently rotate PDF pages clockwise 90°, counter-clockwise 270°, or 180° upside-down.
Trim unwanted PDF margins, white borders, or crop specific page areas with custom dimensions.
Rearrange and reorder PDF pages in any custom sequence or reverse order.
Remove unwanted pages or page ranges from any PDF document quickly.
Extract selected pages from a PDF document into a brand new standalone PDF file.
Insert customizable page numbers, formats (Page n of total), and positions into all PDF pages.
Stamp text watermarks across PDF pages with custom opacity, rotation angle, font size, and color.
Encrypt your PDF document with a password to restrict unauthorized viewing and copying.
Remove password restrictions and security from a PDF file to allow unrestricted access.
Convert multiple photos, scans, and images (JPG, PNG, WebP) into a clean, multi-page PDF document.
Convert each page of a PDF document into high-resolution JPG or PNG image files.
Extract all readable text content from any PDF document with instant clipboard copy and .TXT download.
Convert typed or pasted plain text, articles, or notes into a beautifully formatted PDF file.
Quickly remove backgrounds from PNG and JPG images to create transparent PNGs.
Quickly apply a pixelation mosaic effect to any image with custom block sizes.
Convert any color photo or image into a classic black and white grayscale image.
Invert the RGB color channels of an image to produce a negative effect.
Apply Gaussian blur to soften an image or obscure confidential information.
Encode text into Morse code dots and dashes, or decode Morse back to text with live audio playback.
Quickly find and replace strings or regular expressions across multiple paragraphs.
Reverse the order of characters, words, or lines in any text string.
Convert text between UPPERCASE, lowercase, Title Case, camelCase, snake_case, and kebab-case.
Count words, characters with/without spaces, sentences, paragraphs, and estimated reading time.
Quickly encode a text string into Base64 or decode a Base64 string back into readable text.
Convert characters to percent-encoded strings for URL query parameters or decode encoded URLs.
Combine multiple lines or string fragments into a single string with custom separators.
Break a continuous string into multiple lines or fragments based on a custom delimiter.
Sort list lines alphabetically (A–Z, Z–A), numerically, or by length.
Filter out repeating duplicate lines from lists and retain only unique entries.
Randomize and shuffle the order of items or lines in any list using Fisher-Yates algorithm.
Calculate sum, average, min, max, and product from any list of numbers.
Transform numeric digits into English written words (e.g. 1024 -> one thousand twenty-four).
Verify if any given integer is a prime number and find the subsequent prime.
Pick random winners or items from any candidate list with raffle-style selection.
Flip one or hundreds of coins with probability percentages and heads/tails tallies.
Roll d4, d6, d8, d10, d12, d20, and d100 dice for board games and RPG simulations.
Generate cryptographically random UUID v4 identifiers with uppercase and hyphen options.
Compute cryptographic hashes (SHA-256, SHA-1, SHA-512) directly on-device using Web Crypto.
Format, prettify, indent, and minify JSON data structures with syntax verification.
Convert characters to HTML entities (<, &) or decode named and numeric HTML entities.
Full-screen digital clock with live ticking seconds, current date, and local timezone explorer.
Estimate monthly mortgage payments including principal, interest, taxes, insurance, HOA, and PMI.
Calculate monthly payments, total interest, and total cost for personal, auto, or student loans.
Determine car financing payments factoring in vehicle price, trade-in equity, sales tax, and dealer fees.
Compare simple interest versus compound interest growth side by side across customizable terms.
Find out how much loan you can afford for a target payment, or how long it will take to pay off a balance.
Project retirement nest egg growth, safe annual drawdown (4% rule), and monthly retirement income.
Generate complete year-by-year and month-by-month loan repayment schedules with extra payment impact.
Forecast the future value of your portfolio with recurring contributions and compounded growth.
Understand the erosion of purchasing power over time and calculate future equivalent costs.
Analyze return on investment (ROI), compound annual growth rate (CAGR), and Rule of 72 doubling time.
Estimate effective tax rate, federal bracket, standard deduction, and net take-home pay.
Calculate compounded growth with daily, monthly, quarterly, semi-annual, or annual compounding.
Convert annual salary into hourly, daily, weekly, bi-weekly, semi-monthly, and monthly earnings.
Solve for the exact loan interest rate (APR) given the total balance, term, and monthly payment.
Add sales tax to an item or reverse-calculate the pre-tax price from a total receipt with discount support.
Compute Goods & Services Tax (GST) additions or reverse GST deductions with 50/50 CGST/SGST breakdown.
Calculate effective hourly rate and gross earnings including overtime premiums, bonuses, and paid time off.
Compute Body Mass Index (BMI), healthy weight target ranges, and World Health Organization categories.
Determine Total Daily Energy Expenditure (TDEE) and caloric targets for weight loss, maintenance, or gain.
Estimate body fat percentage, lean body mass, and fat mass using the standardized US Navy circumference method.
Calculate Basal Metabolic Rate using both Mifflin-St Jeor and revised Harris-Benedict formulas.
Compare ideal body weight estimates across medical formulas: Devine, Robinson, Miller, and Hamwi.
Calculate running pace, speed, finish times, and kilometer/mile splits for 5K, 10K, Half, and Full Marathons.
Track gestational age in weeks & days, trimester progress, developmental milestones, and days to delivery.
Estimate the most probable conception date window and fertile intercourse window from LMP or due date.
Determine estimated delivery date (EDD) based on last menstrual period, conception, or cycle adjustments.
A tactile, everyday basic calculator featuring arithmetic operators, parentheses, memory, and calculation history.
Advanced scientific calculator with trigonometric functions, degrees/radians toggle, logarithms, powers, and roots.
Convert values to engineering SI metric prefixes (k, M, G, m, u, n, p) and solve Ohm’s Law circuits.
Add, subtract, multiply, and divide fractions and mixed numbers with step-by-step simplification and LCD.
Solve percentage of a value, percentage comparison, percentage increase/decrease, and value adjustments.
Solve triangles using Heron’s formula, SSS, SAS, and right-triangle rules with area, perimeter, and angles.
Compute sample and population standard deviation, variance, mean, median, IQR, and statistical summary.
Generate customizable ranges of random integers, dice rolls, coin flips, with optional duplicate exclusion and sorting.
Calculate your exact age in years, months, and days, with total days, hours, and next birthday countdown.
Calculate the span between two dates or add/subtract days, business days, weeks, and months from a calendar date.
Calculate the exact duration between timestamps across midnight or add and subtract time intervals.
Track weekly employee timesheets, calculate regular and overtime hours, unpaid lunch breaks, and total gross pay.
Convert units across length, mass, temperature, volume, area, speed, time, and digital storage.
Convert between number bases (Decimal, Binary, Hex, Octal) and compute internet download transfer times.
Calculate cumulative unweighted 4.0 GPA and weighted 5.0 GPA with custom credit hours and honors/AP weighting.
Calculate weighted overall course grades and find the exact score needed on your final exam to reach a target grade.
Estimate required concrete volume in cubic yards and meters for slabs, footings, and cylindrical columns with bag counts.
Calculate IPv4 CIDR subnet masks, wildcard masks, network addresses, broadcast addresses, and usable host ranges.
Create cryptographically strong, secure passwords with custom lengths, character sets, and an entropy meter.
Blend 2 to 4 names into cute couple names, baby names, or modern startup portmanteaus with smooth phonetic harmony.