Free Web Tools
A growing set of fast, private utilities that run entirely in your browser — what you enter never leaves your device. Built by Patrick Bushe.
Text Truncator
Free text truncator for cleaning, transforming, and checking pasted text. Process content locally in your browser without uploads.
Open Tooltherm to kilowatt-hour Converter
Free therm to kilowatt-hour converter with exact energy math, reverse conversion, copy-ready output, and a quick reference table in your browser.
Open ToolTile Calculator
Free tile calculator: enter the area and tile size to get the number of tiles and boxes needed, including a waste allowance, in your browser.
Open ToolTime Card Calculator
Free time card calculator that calculates dates and times locally in your browser with specific examples, limits, and copy-ready output. No account required.
Open ToolTint and Shade Generator
Free tint and shade generator: create lighter tints and darker shades of any color, in your browser.
Open ToolTip Calculator
Free tip calculator that splits a bill, tip amount, total, and per-person cost from bill amount and party size. Runs locally in your browser for private...
Open ToolTire Pressure Converter
Free tire pressure converter: convert between PSI, bar, kPa, and atmospheres, computed locally in your browser.
Open ToolTire Size Comparison Calculator
Compare tire diameter change, speedometer error, and actual speed from old and new tire diameters. It runs entirely in your browser — no uploads or accounts.
Open ToolTitle Case Style Guide Converter
Free title case style guide converter applies AP, Chicago, APA, or MLA capitalization rules. Runs in your browser; no uploads or accounts are used.
Open ToolTOML To JSON Basic
Free basic TOML to JSON converter for simple key value config files. Parse common TOML subsets locally in your browser.
Open ToolTrailer Tongue Weight Calculator
Calculate tongue weight and axle load from trailer weight and a tongue percentage. It runs entirely in your browser — no uploads or accounts.
Open ToolTSV CSV Converter
Free TSV and CSV converter that swaps tab-separated and comma-separated data with quoted fields. Convert spreadsheet exports in your browser.
Open ToolTwitter Character Counter
Count Unicode characters against a 280-character Twitter post limit, see remaining or excess length, and edit privately in your browser without uploads.
Open ToolTwitter Engagement Rate Calculator
Estimate total engagements from a follower count and an engagement rate. Everything is calculated locally in your browser, with no uploads or sign-ups.
Open ToolTwo-Variable Covariance Calculator
Free two-variable covariance calculator with an immediate result. It calculates population covariance for paired summaries privately in your browser.
Open ToolUnix Timestamp Converter
Convert Unix timestamps to local and UTC dates, or dates back to seconds and milliseconds.
Open ToolUpside Down Text Generator
Free upside down text generator for cleaning, transforming, and checking pasted text. Process content locally in your browser without uploads.
Open ToolURL Encoder & Decoder
Free URL encoder and decoder: percent-encode text for safe use in URLs, or decode it back, computed in your browser.
Open ToolURL Encoder & Decoder
Encode and decode URLs, query parameters, UTM values, and percent-encoded text.
Open ToolURL Origin Comparator
Free URL origin comparator that normalizes HTTP and HTTPS scheme, hostname, and effective port before testing same-origin status in your browser.
Open ToolUrl Path Joiner
Join base URLs and path segments without duplicate slashes or missing separators. Free and private in your browser, with nothing uploaded and no account.
Open ToolURL Query Builder
Free URL builder: enter a base URL and key-value parameters to get a correctly encoded query string URL, built locally in your browser.
Open ToolURL Safe Base64 Converter
Free URL-safe Base64 converter for standard and URL-safe variants. Swap padding, plus, slash, dash, and underscore locally.
Open ToolUS bushel to liter Converter
Free us bushel to liter converter with exact volume math, reverse conversion, copy-ready output, and a quick reference table in your browser.
Open ToolUS cup to tablespoon Converter
Free us cup to tablespoon converter with exact volume math, reverse conversion, copy-ready output, and a quick reference table in your browser.
Open ToolUS fluid ounce to tablespoon Converter
Free us fluid ounce to tablespoon converter with exact volume math, reverse conversion, copy-ready output, and a quick reference table in your browser.
Open ToolUS Fluid Ounces to Cups
Convert US fluid ounces to US cups and cups to fluid ounces with exact customary scaling, clear regional labels, and results in your browser.
Open ToolUS Quarts to Liters Converter
Convert US liquid quarts to liters and liters to US quarts with the exact customary factor, six-significant-figure results, in your browser.
Open ToolUtilization Revenue Calculator
Calculate annual revenue from an hourly rate, weekly billable hours, and weeks worked. It runs entirely in your browser — no uploads or accounts.
Open ToolUTM Builder
Add campaign source, medium, campaign, term, and content parameters to any URL.
Open ToolUTM Campaign Kit
Build utm campaign kit in your browser with a live preview and one-click copy. Free and private: everything is generated locally in your browser with no upload.
Open ToolUUID v7 Generator
Free UUID version 7 generator: create time-ordered, sortable UUIDs using secure randomness, in your browser.
Open ToolValue Proposition Builder
Free value proposition builder that turns audience, problem, outcome, and proof into clear positioning statements for landing pages. Runs locally in your...
Open ToolVariance Calculator
Free variance calculator: find the sample and population variance and standard deviation of a data set, in your browser.
Open ToolViewport Unit Converter
Free viewport unit converter: switch between pixels and vw or vh for a given viewport size, in your browser.
Open ToolVite ENV Prefix Auditor
Audit Vite environment variable names for the configured public prefix with a live preview and one-click copy. Free and private — nothing is uploaded.
Open ToolVoltage Divider Calculator
Free voltage divider calculator: enter input voltage and two resistors to get the output voltage and current, computed locally in your browser.
Open ToolVoltage Drop Calculator
Calculate two-conductor voltage drop from one-way length, current, resistance per kilometer, and supply voltage privately in your browser safely now.
Open ToolVolume Converter
Free volume converter that converts values instantly in your browser. Includes examples, formulas, limits, copy-ready output, and local privacy.
Open ToolWater Grams to Cups Converter
Convert water grams to US cups and cups to grams using a 236.6-gram room-temperature convention, with precise results calculated in your browser.
Open ToolWebinar Recap Template Generator
Generate a recap template for webinars, workshops, and recorded presentations.
Open ToolWebsite Disclaimer Generator
Generate website disclaimer text for general, affiliate, views-own, no-professional-advice, or testimonial contexts from labeled site fields.
Open ToolWeekly Volume Lift Calculator
Calculate weekly rep volume from sets and reps per set. Everything is computed locally in your browser, with no uploads and no sign-ups.
Open ToolWeighted Grade Calculator
Free weighted grade calculator: combine assignment scores and their weights into an overall grade, in your browser.
Open ToolWholesale Margin Calculator
Calculate a wholesale price and the discount off retail from a retail price. Everything is calculated locally in your browser, with no uploads or sign-ups.
Open ToolWind Speed Converter
Free wind speed converter: convert between mph, km/h, m/s, and knots, computed locally in your browser.
Open ToolWords to Number
Free words to number that converts values instantly in your browser. Includes examples, formulas, limits, copy-ready output, and local privacy.
Open ToolXML to JSON Converter
Free XML to JSON converter that parses elements, attributes, and text into structured JSON. Convert snippets privately in your browser quickly.
Open ToolYAML Indentation Checker
Check YAML indentation widths and flag tabs or uneven nesting. A line indented by three spaces is flagged when the project expects two-space indentation.
Open ToolYards to Meters Converter
Convert yards to meters and meters to yards using the exact international yard definition, with precise results and a quick table in your browser.
Open ToolYouTube Watch Time Calculator
Estimate total watch time in minutes and hours from views and average view duration. It runs entirely in your browser — no uploads or accounts.
Open ToolZ85 Encoder and Decoder
Encode hexadecimal byte groups with ZeroMQ Z85 or decode Z85 into exact lowercase hex, using strict block validation locally in your browser.
Open ToolZalgo Glitch Text Generator
Free zalgo glitch text generator for cleaning, transforming, and checking pasted text. Process content locally in your browser without uploads.
Open ToolABV from OG FG Calculator
Calculate approximate alcohol by volume from original gravity and final gravity readings. It runs entirely in your browser — no uploads or accounts.
Open ToolAcceleration Converter
Free acceleration converter: convert between m/s², ft/s², g-force, and gal, computed locally in your browser.
Open Toolacre to sq mile Converter
Free acre to sq mile converter with exact factors, reverse conversion, copy-ready output, and a quick reference table that runs in your browser.
Open Toolacre-foot to US gallon Converter
Free acre-foot to us gallon converter with exact volume math, reverse conversion, copy-ready output, and a quick reference table in your browser.
Open ToolAd Headline Variant Mixer
Mix ad headline variant in your browser with a live preview and one-click copy. It runs entirely client-side, so nothing is uploaded and no account is needed.
Open ToolAdd Business Days Calculator
Free add business days calculator: skip weekends to find the date a set number of working days from a start date, computed in your browser.
Open ToolAdd Page Numbers to PDF
Stamp page numbers onto a PDF in your browser with a chosen position, format, and start value, then download it. Your file is never uploaded anywhere.
Open ToolAgency Blended Rate Calculator
Calculate a blended hourly rate from senior and junior rates and hours. Everything is calculated locally in your browser, with no uploads or sign-ups.
Open ToolAir Fryer Converter
Free air fryer conversion calculator: adapt oven temperature and time for an air fryer, computed locally in your browser.
Open ToolAlcohol Proof Converter
Free alcohol proof converter that converts US proof and alcohol by volume. Review labeled assumptions and a worked result calculated privately in your browser.
Open ToolAPA Citation Generator
Format a basic APA-style web or article citation from author, year, title, publication, and URL fields, then copy it in your browser without uploads.
Open ToolAPR to APY Calculator
Free apr to apy calculator with labeled inputs and an immediate result. It converts nominal APR to compounded annual yield privately in your browser.
Open ToolAPY to APR Calculator
Free apy to apr calculator with labeled inputs and an immediate result. It converts effective annual yield to nominal APR privately in your browser.
Open ToolArc Length Calculator
Free arc length calculator with labeled inputs and an immediate result. It finds circular arc length from radius and angle privately in your browser.
Open ToolAscii85 Encoder & Decoder
Free Ascii85 encoder and decoder: convert text to compact Ascii85 and back, computed locally in your browser.
Open ToolAverage Order Value Calculator
Free average order value calculator: find AOV from total revenue and number of orders, computed in your browser.
Open ToolBacksplash Tile Count Calculator
Calculate tiles and boxes for a backsplash from area, coverage, box size, and waste. It runs entirely in your browser — no uploads or accounts.
Open ToolBacon Cipher
Free Baconian cipher tool: encode text into five-letter A/B groups and decode it back, computed locally in your browser.
Open ToolBaker’s Percentage Calculator
Free baker’s percentage calculator: turn hydration and ingredient percentages into weights from your flour weight, in your browser.
Open Toolbarn to sq meter Converter
Free barn to sq meter converter with exact factors, reverse conversion, copy-ready output, and a quick reference table that runs in your browser.
Open ToolBase45 Encoder and Decoder
Encode UTF-8 text with RFC 9285 Base45 or decode Base45 groups with range checks, entirely offline with copy-ready output in your browser safely now.
Open ToolBase58 Encoder & Decoder
Free Base58 encoder and decoder using the Bitcoin alphabet, converting hex bytes, computed locally in your browser.
Open ToolBase64URL Converter
Free Base64URL converter: switch between standard Base64 and URL-safe Base64, adjusting characters and padding, locally in your browser.
Open ToolBasic Auth Encoder
Free basic auth encoder for a focused result. It encodes a username and password as an HTTP Basic credential with private local processing in your browser.
Open ToolBeaufort Cipher
Encode or decode text with the reciprocal Beaufort cipher and a repeating alphabetic key, preserving nonletters privately in your browser without uploads.
Open ToolBinary IP Converter
Free IPv4 converter between dotted decimal, dotted binary, a 32-bit integer, and hexadecimal — enter any form and get the rest, in your browser.
Open ToolBits & Bytes Converter
Free bits and bytes converter: convert between bits, bytes, and their decimal multiples, computed locally in your browser.
Open Toolboard foot to cu inch Converter
Free board foot to cu inch converter with exact volume math, reverse conversion, copy-ready output, and a quick reference table in your browser.
Open ToolBody Surface Area Mosteller
Calculate body surface area. Every value is computed locally in your browser, so nothing is uploaded, stored, or shared, and no account is needed.
Open ToolBootstrap Theme Color
Generate bootstrap theme color in your browser with a live preview and one-click copy — free and private, generated locally in your browser with no upload and.
Open ToolBorder Radius Generator
Free CSS border-radius generator: set each corner and copy the CSS, with a live preview, in your browser.
Open ToolBoyle’s Law Calculator
Free Boyle’s law calculator: solve P1V1 = P2V2 for the missing pressure or volume, in your browser.
Open ToolBrand Color Accessibility Matrix
Generate brand color accessibility matrix in your browser with a live preview and one-click copy. Free, private, and instant in your browser.
Open ToolBrick Calculator
Free brick calculator: estimate how many bricks a wall needs from its area, with waste allowance, in your browser.
Open ToolBrine Salt Calculator
Calculate salt grams for a brine from water weight and target salinity percent with private math. It runs entirely in your browser, with no uploads or accounts.
Open ToolBTU Calculator
Free BTU calculator: estimate the cooling or heating capacity a room needs from its size, computed locally in your browser.
Open ToolBTU to Joules Converter
Convert British thermal units to joules and joules to BTU using the standard thermochemical factor, with precise energy results in your browser.
Open ToolBubble Text Generator
Free bubble text generator: convert letters and numbers into circled Unicode characters that paste into bios and posts, in your browser.
Open ToolBusiness Hours Capacity Calculator
Calculate work capacity hours from workdays and productive hours per day. Everything is calculated locally in your browser, with no uploads or sign-ups.
Open ToolButter Grams to Cups Converter
Convert butter grams to US cups and cups to grams using the common 227-gram cup convention, with recipe-ready results calculated in your browser.
Open Toolbyte to kibibyte Converter
Free byte to kibibyte converter with exact factors, reverse conversion, copy-ready output, and a quick reference table that runs in your browser.
Open ToolCaesar Cipher
Free Caesar cipher tool: shift letters by any amount to encode or decode a message, computed locally in your browser.
Open ToolCake Serving Calculator
Calculate cake servings by dividing the top area by the area per serving. Everything is calculated locally in your browser, with no uploads or sign-ups.
Open ToolCalorie Deficit Calculator
Free calorie deficit calculator: find the daily deficit needed for a target weekly weight loss, in your browser.
Open ToolCalories Burned Calculator
Free calories burned calculator using MET values for common activities, from your weight and duration, computed in your browser.
Open ToolCalories Burned Walking
Free calories burned walking calculator from your weight, time, and pace, computed locally in your browser.
Open ToolCar Loan Calculator
Free car loan calculator: find the monthly payment and total interest from price, down payment, rate, and term, in your browser.
Open ToolCarats to Grams Converter
Convert carats to grams and grams to carats with the exact metric gemstone definition, decimal inputs, and a practical reference table in your browser.
Open ToolCarb Cycling Day Calculator
Calculate carb calories and grams from daily calories and a carb percentage. Everything is calculated locally in your browser, with no uploads or sign-ups.
Open ToolCarpet Roll Length Calculator
Calculate linear feet of carpet needed from room area and roll width. Everything is calculated locally in your browser, with no uploads or sign-ups.
Open ToolCase Style Converter
Convert text into camelCase, PascalCase, snake_case, kebab-case, and CONSTANT_CASE.
Open ToolCatalan Number Calculator
Free catalan number calculator that computes a Catalan sequence value, with labeled assumptions and an immediate result calculated privately in your browser.
Open ToolCD Ladder Calculator
Split savings across certificate terms and estimate weighted average yield. Everything is calculated locally in your browser, with no uploads or sign-ups.
Open ToolCeiling Fan Size Helper
Free ceiling fan size helper that suggests a fan span band from room area. Review labeled assumptions and a worked result calculated privately in your browser.
Open ToolCelsius to Kelvin Converter
Convert Celsius to kelvins and kelvins to Celsius using the exact 273.15 offset, with precise scientific results calculated in your browser.
Open ToolCentimeters to Feet Converter
Convert centimeters to decimal feet and feet to centimeters using the international-foot definition, with clear, precise results in your browser.
Open ToolCentripetal Force Calculator
Free centripetal force calculator with labeled inputs and an immediate result. It calculates inward force for circular motion privately in your browser.
Open ToolChangelog Diff Summarizer
Summarize changelog diff in your browser with a live preview and one-click copy. It runs entirely client-side, so nothing is uploaded and no account is needed.
Open ToolChangelog Entry
Work with changelog entry in your browser with a live preview and one-click copy. It runs entirely client-side, so nothing is uploaded and no account is needed.
Open ToolCharles’s Law Calculator
Free Charles’s law calculator: solve V1/T1 = V2/T2 for the missing volume or temperature, in your browser.
Open ToolChicago Citation Generator
Free Chicago citation generator orders author, title, publisher, year, and URL details. Runs in your browser; no uploads or accounts are used.
Open ToolChmod Calculator
Free chmod calculator: toggle read, write, and execute for owner, group, and others to get the octal and symbolic permission strings, in your browser.
Open ToolChurn Rate Calculator
Free churn rate calculator: find your customer churn and retention rate over a period, computed locally in your browser.
Open ToolCIDR Aggregate Calculator
Free CIDR aggregate calculator that normalizes IPv4 blocks, removes contained entries, and recursively merges aligned siblings in your browser.
Open ToolCIDR Split Calculator
Free CIDR split calculator that normalizes an IPv4 parent and enumerates equal child networks for a longer prefix with exact network math in your browser.
Open ToolCinder Block Calculator
Estimate concrete block count from wall length, height, block face area, and waste percent. It runs entirely in your browser, with no uploads or accounts.
Open ToolCircle Calculator
Free circle calculator: find area, circumference, and diameter from a radius, computed locally in your browser.
Open ToolCircle Image Cropper
Use this free circle image cropper in your browser to crop a local raster image to a centered transparent circle. Output stays private and local.
Open ToolCircle Sector Area Calculator
Free circle sector calculator: find the area and arc length of a sector from radius and angle, in your browser.
Open ToolClick Speed Test
Run a timed CPS click speed test with a large click pad, duration choices, live clicks-per-second, final score, and browser-saved personal best.
Open ToolCoefficient of Variation Calculator
Free coefficient of variation calculator: find relative variability as a percentage of the mean, in your browser.
Open ToolCoffee Extraction Yield Calculator
Calculate coffee extraction yield from beverage mass, TDS, and dose. Everything is calculated locally in your browser, with no uploads or sign-ups.
Open ToolCoffee Ratio Calculator
Free coffee ratio calculator: enter water and a brew ratio to get the grams of coffee, or work back from a cup count, in your browser.
Open ToolCoin Flip
Free online coin flip: flip one coin or many at once and see the heads and tails tally, generated fairly in your browser.
Open ToolCoin Flip Probability Calculator
Free coin flip probability calculator: find the odds of getting a number of heads in a series of flips, in your browser.
Open ToolColor Accessible Border
Generate border colors that separate adjacent surfaces with a target contrast hint. Free and private in your browser, with nothing uploaded and no account.
Open ToolColor Accessible Link Palette
Generate color accessible link palette in your browser with a live preview and one-click copy — free and private, generated locally in your browser with no.
Open ToolColor Alert State Palette
Build success, warning, danger, and info color swatches from adjustable base tones. Free and private in your browser, with nothing uploaded and no account.
Open ToolColor Alpha Blend Calculator
Calculate color alpha blend in your browser with a live preview and one-click copy — free and private, generated locally in your browser with no upload and no.
Open ToolColor Avatar Palette
Create avatar background and initials colors for user lists and comments. Everything runs locally in your browser with nothing uploaded and no account needed.
Open ToolColor Badge Contrast Matrix
Check badge text, background, and border colors across several statuses. A status badge set can compare draft, live, blocked, and archived colors.
Open ToolColor Blend Mode
Generate color blend mode in your browser with a live preview and one-click copy. It runs entirely client-side, so nothing is uploaded and no account is needed.
Open ToolColor Blind Palette Auditor
Audit color blind palette in your browser with a live preview and one-click copy. It runs entirely client-side, so nothing is uploaded and no account is needed.
Open ToolColor Brand Hover State
Create hover, active, and pressed colors from a primary brand swatch. A blue CTA can get darker active and lighter hover variants for a button system.
Open ToolColor Brand Tone Namer
Name color brand tone in your browser with a live preview and one-click copy. Free and private: everything is generated locally in your browser with no upload.
Open ToolColor Button State Palette
Build button colors for default, hover, active, disabled, border, and focus states. Free and private in your browser, with nothing uploaded and no account.
Open ToolColor Chart Series Palette
Build chart series color tokens with names, swatches, and CSS variable output. Free and private in your browser, with nothing uploaded and no account.
Open ToolColor Code Syntax Palette
Create syntax highlighting swatches for keywords, strings, numbers, comments, and functions. Free and private in your browser, with nothing uploaded.
Open ToolColor Contrast Batch Checker
Check color contrast batch in your browser with a live preview and one-click copy — free and private, generated locally in your browser with no upload and no.
Open ToolColor CSS Color Function
Preview modern CSS color functions such as rgb, hsl, lab-like labels, and color-mix notes. Free and private in your browser, with nothing uploaded.
Open ToolColor CSS Layer Token Palette
Create color tokens for base, component, overlay, and top-layer UI surfaces. Free and private in your browser, with nothing uploaded and no account.
Open ToolColor CSS Named Color Search
Search local CSS named colors by name or hex and preview the closest swatches. Typing coral can show the named color value and nearby warm alternatives.
Open ToolColor Dark Mode Inverter
Preview dark-mode token suggestions from a light background, surface, and text set. Free and private in your browser, with nothing uploaded and no account.
Open ToolColor Disabled State Token
Build disabled-state foreground, background, and border tokens from active colors. Free and private in your browser, with nothing uploaded and no account.
Open ToolColor Elevation Shadow Mixer
Mix shadow colors from surface and background colors for elevation levels. Everything runs locally in your browser with nothing uploaded and no account needed.
Open ToolColor Focus Visible Token
Create focus ring tokens with color, offset, width, and contrast notes with a live preview and one-click copy. Free and private — nothing is uploaded.
Open ToolColor Foreground Background Swaps
Check a foreground/background pair in both normal and swapped directions. Everything runs locally in your browser with nothing uploaded and no account needed.
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