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.
Time Tracking Summarizer
Free time tracking summarizer that adds pasted hour entries, groups notes, and estimates billable value from a rate. Runs locally in your browser for...
Open ToolTimecode Calculator
Free timecode calculator that converts values instantly in your browser. Includes examples, formulas, limits, copy-ready output, and local privacy.
Open ToolTrailing Whitespace Remover
Free trailing whitespace remover for code and plain text. Strip line-end spaces and tabs locally in your browser.
Open ToolTV Viewing Distance
Free TV viewing distance calculator: enter a screen size to get the recommended seating range for comfortable and cinematic viewing, in your browser.
Open ToolUnused License Calculator
Estimate wasted spend from unused seats, licenses, or subscriptions.
Open ToolVersion Comparator
Free semantic version comparator that checks whether one version is newer, older, or equal to another locally.
Open ToolWordPress Slug Cleaner
Clean post titles into short WordPress-safe URL slugs.
Open ToolWork Done Calculator
Free work done calculator: find mechanical work from force, distance, and angle, computed in your browser.
Open ToolXYZ Color Converter
Use this free XYZ color converter in your browser to convert sRGB hex colors to CIE XYZ D65 and back. Output stays private and local. No upload is needed.
Open ToolZodiac Sign Finder
Free zodiac sign finder: discover your astrological star sign from your birth date, computed locally in your browser.
Open ToolAbbreviation Expander
Free abbreviation expander replaces common workplace and internet short forms with full phrases. Runs in your browser; no uploads or accounts are used.
Open ToolABV Fermentation Calculator
Free abv fermentation calculator with labeled inputs and an immediate result. It estimates alcohol by volume from gravity readings privately in your browser.
Open ToolAnchor Text Diversity Checker
Free anchor text diversity checker that groups exact, partial, branded, URL, and generic anchors from a pasted backlink list. Runs locally in browser.
Open ToolASCII Table Reference
Free searchable ASCII table reference for decimal, hexadecimal, binary, and printable characters. Look up code points locally.
Open Toolastronomical unit to kilometer Converter
Free astronomical unit to kilometer converter with exact length math, reverse conversion, copy-ready output, and a quick reference table in your browser.
Open ToolAtbash Cipher
Free Atbash cipher: reverse the alphabet so A becomes Z and B becomes Y. Encode and decode with the same step, all in your browser.
Open ToolAuto Loan Calculator
Free auto loan calculator for car price, down payment, trade-in, APR, term, monthly payment, and interest. Runs locally in your browser for private planning.
Open ToolAverage Word Length Calculator
Free average word length calculator reports token count, characters, and mean token length. Runs in your browser; no uploads or accounts are used.
Open Toolbar to kilopascal Converter
Free bar to kilopascal converter with exact pressure math, reverse conversion, copy-ready output, and a quick reference table in your browser.
Open ToolBernoulli Equation Calculator
Calculate downstream pressure from two speeds and elevations using steady incompressible Bernoulli flow, with local output in your browser safely now.
Open ToolBillable Hours Rounder
Free billable hours rounder that rounds time entries to common billing increments and estimates invoice value. Runs locally in your browser for private...
Open ToolBlind Slat Count Calculator
Calculate the number of blind slats from window height and slat pitch. Everything is calculated locally in your browser, with no uploads or sign-ups.
Open ToolBMI Calculator
Free BMI calculator for adults that converts pounds and inches into body mass index, standard category bands, and a clear local estimate for planning.
Open ToolBMI Prime Calculator
Free BMI Prime calculator: express your BMI as a ratio to the upper-normal limit, computed locally in your browser.
Open ToolBMR Calculator
Free BMR calculator using the Mifflin St Jeor equation to estimate resting daily calories from age, sex, height, and weight inputs in your browser.
Open ToolBody Frame Size Calculator
Free body frame size calculator: find your frame from height and wrist circumference, computed in your browser.
Open ToolBrand Voice Checklist
Generate a brand voice checklist with tone, vocabulary, proof points, banned words, and publishing checks.
Open ToolBreak-Even Calculator
Free break-even calculator that runs locally in your browser.
Open ToolBTU/hour to watt Converter
Free btu/hour to watt converter with exact factors, reverse conversion, copy-ready output, and a quick reference table that runs in your browser.
Open ToolCanonical URL Builder
Normalize URLs, remove tracking parameters, and copy canonical tags.
Open ToolCentimeters to Inches Converter
Convert centimeters to inches and inches to centimeters with an exact metric factor, six-significant-figure results, and a quick table in your browser.
Open ToolCharacter Frequency Counter
Free character frequency counter for cleaning, transforming, and checking pasted text. Process content locally in your browser without uploads.
Open ToolClient Onboarding Checklist
Generate a client onboarding checklist with kickoff, access, assets, approvals, and communication steps.
Open ToolCocktail Ratio Scaler
Free cocktail scaler: enter a recipe in parts and a batch size to get exact volumes for each ingredient, computed locally in your browser.
Open ToolCode Line Counter
Free code line counter that estimates code, blank lines, and comments for pasted snippets. Review LOC locally in your browser.
Open ToolCoin Change Calculator
Free coin change calculator: break an amount into the fewest US coins and bills, computed locally in your browser.
Open ToolCold Email Template Builder
Free cold email template builder that creates opener, relevance, pitch, proof, and call-to-action drafts from your inputs. Runs locally in your browser for...
Open ToolColor Chart Legend
Generate color chart legend 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 Contrast Pair Finder
Find color contrast pair 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 Palette Image Exporter
Free palette image exporter that renders pasted hex colors as a downloadable PNG swatch strip in your browser.
Open ToolColor Palette Image Generator
Free color palette image generator: turn a list of hex colours into a labelled swatch image, downloadable as PNG, in your browser.
Open ToolColor Relative Luminance Table
Calculate WCAG relative luminance for a list of hex colors and copy a table. Free and private in your browser, with nothing uploaded and no account.
Open ToolColor Tint Shade Stepper
Generate tint and shade steps from a base color with adjustable intervals. Everything runs locally in your browser with nothing uploaded and no account needed.
Open ToolColumn Name Standardizer
Standardize pasted column names into clean snake_case style.
Open ToolCombinations & Permutations Calculator
Free nCr and nPr calculator: enter n and r to get combinations and permutations without overflowing on large factorials, in your browser.
Open ToolConditional Probability Calculator
Free conditional probability calculator: find P(A given B) from the joint and marginal probabilities, in your browser.
Open ToolContent Angle Generator
Generate practical content angles for a topic, offer, or audience.
Open ToolContent Repurposing Checklist
Free content repurposing checklist that turns one asset into post, email, short video, lead magnet, and sales enablement ideas. Runs locally in your browser...
Open ToolConversion Rate Calculator
Free conversion rate calculator that turns visitors, leads, sales, and revenue into funnel conversion and value metrics. Runs locally in your browser for...
Open ToolCost of Living Comparator
Free cost of living comparator that uses manual index values to compare equivalent salary between two cities. Runs locally in your browser for private planning.
Open ToolCSS Anchor Link Offset
A sticky header can cover the target heading after the browser scrolls it to the top of the viewport. Scroll margin offsets the final position.
Open ToolCSS Clip Path Generator
Free CSS clip-path generator for polygon, circle, and inset shapes. Preview clipped blocks and copy CSS locally.
Open ToolCSS Cursor Preview
Free CSS cursor preview for common cursor values. Test hover cursor styles and copy the CSS locally in your browser.
Open ToolCSS Dotted Background Generator
Generate CSS dotted background in your browser with a live preview and one-click copy — free and private, generated locally in your browser with no upload and.
Open ToolCSS Easing Previewer
Free css easing previewer that runs locally in your browser.
Open ToolCSS Empty State
Build CSS empty state 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 ToolCSS Loading Spinner Generator
Free CSS loading spinner generator with size, border, color, and speed controls. Preview and copy spinner CSS locally.
Open ToolCSS Logical Properties Converter
Use this free CSS logical properties converter in your browser to translate physical spacing into logical block and inline CSS. Output stays private and local.
Open ToolCSS Pagination
Build CSS pagination 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 ToolCSS Rating Stars
Build CSS rating stars 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 ToolCSS Scrollbar Color
Build scrollbar-color and WebKit scrollbar styles for scrollable panels with a live preview and one-click copy. Free and private — nothing is uploaded.
Open ToolCSS Sticky Header Snippet
Free CSS sticky header snippet generator with offset, z-index, blur, and border options. Preview sticky header CSS locally.
Open ToolCSS Text Gradient Generator
Free CSS text gradient generator using background-clip text. Pick colors, angle, and preview copy-ready CSS locally.
Open ToolCSS Unit Sandbox
Free CSS unit sandbox for px, em, rem, ch, vw, and percent previews. Compare unit behavior locally.
Open ToolCSS Variables Theme Builder
Free CSS variables theme builder for color, spacing, radius, and font tokens. Export a clean :root block locally.
Open ToolCSS Z Index Playground
Free CSS z-index playground for visualizing stacking order between overlapping elements. Adjust layer values locally.
Open ToolCSV Column Reorder Tool
Free csv column reorder tool that runs locally in your browser.
Open ToolCSV to JSON Lines
Free CSV to JSON Lines converter that turns each row into one compact JSON object per line. Handles quoted fields and runs entirely locally.
Open ToolDebt Avalanche Planner
Free debt avalanche planner that orders debts by highest APR first to prioritize interest savings. Runs locally in your browser for private planning.
Open ToolDeposit Balance Calculator
Calculate the deposit due and remaining balance from a total and a deposit rate. Everything is calculated locally in your browser, with no uploads or sign-ups.
Open ToolDifference of Means CI
Free difference of means confidence interval calculator using two means, standard deviations, sample sizes, and z level privately in your browser.
Open ToolDiscovery Call Question Builder
Generate discovery call questions for service, consulting, website, and marketing projects.
Open ToolDiverging Color Scale
Generate diverging color scale in your browser with a live preview and one-click copy — free and private, generated locally in your browser with no upload and.
Open ToolDividend Reinvestment Calculator
Free DRIP calculator: project an investment’s growth when dividends are reinvested over time, in your browser.
Open ToolEmail Campaign ROI Calculator
Free email campaign ROI calculator that compares send cost, clicks, conversions, revenue, profit, and return on investment. Runs locally in your browser for...
Open ToolEmail List Cleaner
Clean pasted email lists by trimming spaces, lowercasing addresses, and removing duplicates.
Open ToolEmail Subject Line Tester
Check email subject length and preview text pairing.
Open ToolEmpathy Map Builder
Free empathy map builder that organizes what customers say, think, do, and feel into messaging and research prompts. Runs locally in your browser for...
Open ToolEthereum Gas Fee Calculator
Free ethereum gas fee calculator with labeled inputs and an immediate result. It converts gas limit and gwei price to ETH cost privately in your browser.
Open ToolFake JSON Data Builder
Free fake JSON data builder that creates mock records from a simple field schema. Generate sample API data locally.
Open ToolFancy Unicode Font Generator
Free fancy unicode font generator for cleaning, transforming, and checking pasted text. Process content locally in your browser without uploads.
Open ToolFaq Schema Bulk
Build faq schema bulk 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 ToolFinal Price After Tax Calculator
Free after-tax price calculator: add sales tax to a price and see the total, computed locally in your browser.
Open ToolFlexbox Playground
Generate flexbox CSS for direction, alignment, gap, and wrapping.
Open ToolFurlongs to Meters Converter
Convert international furlongs to meters and meters to furlongs using the exact 201.168-meter definition, with precise results in your browser.
Open ToolGitignore Generator
Free .gitignore generator with embedded templates for common stacks. Pick technologies and build ignore rules locally.
Open ToolGray Code Converter
Free Gray code converter: turn binary into reflected Gray code and back, with the decimal value, computed locally in your browser.
Open ToolHashtag Set Builder
Free hashtag set builder that groups branded, niche, audience, and topic hashtags into reusable social caption sets. Runs locally in your browser for...
Open ToolHMAC Generator
Free HMAC generator for keyed SHA signatures. Enter a message and secret key, then calculate the digest locally in your browser.
Open ToolHTML Entity Encoder & Decoder
Escape HTML characters or decode entities locally in your browser.
Open ToolHTML Meta Tag
Build HTML meta tags for name, property, content, charset, and viewport variants. Free and private in your browser, with nothing uploaded and no account.
Open ToolHTTP Header Parser
Paste HTTP response headers to parse status, cache rules, content type, redirects, and common security headers locally.
Open ToolImage Levels Adjuster
Use this free image levels adjuster in your browser to remap local black point white point and midpoint gamma. Output stays private and local.
Open ToolImage Rotator and Flipper
Free image rotator and flipper for turning uploaded images by 90 degree steps, mirroring them, previewing canvas output, and downloading PNGs.
Open ToolInterview Question Generator
Generate role-specific interview questions for skills, judgment, collaboration, and process.
Open ToolInvoice Total Builder
Free invoice total builder that sums pasted line items, applies tax or discount rates, and creates a copyable total summary. Runs locally in your browser...
Open ToolIP Address Info
Free IPv4 address inspector: see the class, whether it is private, loopback, or reserved, plus its integer, hex, and binary forms, all in your browser.
Open ToolJS Minifier Lite
Free lightweight JavaScript minifier for simple snippets. Remove comments and extra whitespace locally before sharing.
Open ToolJSON Key Renamer
Free JSON key renamer that applies bulk old-to-new key mappings across nested objects and arrays. Refactor sample data locally and privately.
Open ToolJSON Schema Visualizer
Visualize JSON schema 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 ToolJSON to .env Converter
Free JSON to .env converter: flatten a JSON object into environment-variable lines, computed in your browser.
Open ToolJSON to Python Dataclass
Free JSON to Python tool: infer a @dataclass with typed fields from a sample JSON object, generated locally in your browser.
Open ToolLight-Year Converter
Free light-year converter: convert between light-years, kilometres, miles, AU, and parsecs, in your browser.
Open ToolList Intersection Difference
Free list intersection and difference tool that compares two pasted lists. Find shared, only-left, and only-right values locally with case options.
Open ToolLocal Business Schema Generator
Free local business schema generator that runs locally in your browser.
Open ToolLongest Word Finder
Free longest word finder identifies the first maximum-length token and reports its character count. Runs in your browser; no uploads or accounts are used.
Open ToolMarkdown Previewer
Write Markdown and preview formatted HTML locally in your browser.
Open ToolMarkdown Table Generator
Free markdown table generator that runs locally in your browser.
Open ToolMatrix Determinant Calculator
Free matrix determinant calculator using pivoted elimination for square matrices, with singularity detection and sign tracking in your browser.
Open ToolMean, Median & Mode Calculator
Free mean, median, and mode calculator: paste numbers to get the average, middle value, most common value, range, count, and sum in your browser.
Open ToolMention Extractor
Free mention extractor finds at-prefixed handles with letters, numbers, dots, underscores, or hyphens. Runs in your browser; no uploads or accounts are used.
Open ToolMetaphone Encoder
Free Metaphone encoder applies English pronunciation rules to create compact phonetic keys. Runs in your browser; no uploads or accounts are used.
Open ToolMeters per Second to KM/H
Convert meters per second to kilometers per hour and back with the exact 3.6 factor, six-significant-figure results, and a table in your browser.
Open Toolmicrosecond to millisecond Converter
Free microsecond to millisecond converter with exact time math, reverse conversion, copy-ready output, and a quick reference table in your browser.
Open ToolMidpoint Date Calculator
Find the date halfway between two dates. Enter a start and end date to get the midpoint date, its weekday, and the days between. Free and instant in your browser.
Open ToolMIME Type Lookup
Free MIME type lookup for common file extensions and content types. Search extension to MIME mappings locally.
Open ToolMoment of Inertia Calculator
Calculate rotational inertia for seven standard ideal shapes from mass and radius or length, with formula-specific output in your browser safely now.
Open ToolMortar Bag Calculator
Estimate whole mortar bags from wall area, product coverage per bag, and a waste allowance using your own project figures in your browser without uploads.
Open ToolNoise Texture Generator
Free noise texture generator: create a random grain texture image, downloadable as PNG, in your browser.
Open ToolNumbered List Maker
Free numbered list maker for cleaning, transforming, and checking pasted text. Process content locally in your browser without uploads.
Open ToolOdds Ratio Calculator
Free odds ratio calculator from a two-by-two event table, returning group odds and their ratio with clear direction entirely in your browser.
Open ToolOKLCH Color Explorer
Free OKLCH color explorer that previews lightness, chroma, and hue controls with copy-ready CSS notation and fallback values.
Open ToolPayback Period Calculator
Free payback period calculator that estimates months to recover CAC, project cost, or investment from recurring profit. Runs locally in your browser for...
Open ToolPercent Error Calculator
Free percent error calculator: compare a measured value to the true value and get the percentage error, computed in your browser.
Open ToolPercent of Total Calculator
Free percent of total calculator: find what percentage one number is of another, computed in your browser.
Open ToolPerson Schema Builder
Free Person schema builder that creates JSON-LD with name, job title, website, image, affiliation, and sameAs profile links. Runs locally in browser.
Open ToolPickle Vinegar Dilution Calculator
Calculate vinegar and water volumes for a brine from a parts ratio. Everything is calculated locally in your browser, with no uploads or sign-ups.
Open ToolPizza Dough Calculator
Free pizza dough calculator using baker’s percentages: set ball count, weight, and hydration to get flour, water, salt, and yeast, in your browser.
Open ToolPorter Stemmer
Free Porter stemmer reduces English words with the classic multi-step suffix algorithm. Runs in your browser; no uploads or accounts are used.
Open ToolPrime Factorization Calculator
Free prime factorization calculator: enter a whole number to break it into its prime factors with exponents, computed locally in your browser.
Open ToolProduct + Offer Schema Builder
Free product offer schema builder that creates Product JSON-LD with price, currency, availability, SKU, brand, and offer URL fields. Runs locally.
Open ToolProduct Title Length Optimizer
Review product titles for length, clarity, and marketplace readability.
Open ToolProfit Margin Calculator
Free profit margin calculator that runs locally in your browser.
Open ToolProject Risk Matrix Builder
Score project risks by likelihood and impact, then generate mitigation notes. Free private browser tool.
Open ToolProperties to JSON Converter
Free Java properties to JSON converter that parses continuations, separators, escapes, Unicode codes, and dotted nested paths in your browser.
Open ToolRace Time Predictor
Free race time predictor using Riegel’s formula to estimate a finish time at another distance, in your browser.
Open ToolRandom Hex Bytes Generator
Free random hex and byte generator using crypto-secure browser randomness. Choose byte length and output format locally.
Open ToolRandom PIN Generator
Free random PIN generator: create secure numeric PINs of any length using your browser’s crypto random source.
Open ToolRedirect Mapping CSV Builder
Build a clean redirect mapping CSV from old and new URL lists. Pair rows, choose status codes, and copy migration-ready output locally.
Open ToolRemove Line Numbers
Free tool to strip leading line numbers from pasted text or code, computed locally in your browser.
Open ToolResistor Color Code Decoder
Free resistor color code decoder: pick 4 or 5 bands to read the resistance value and tolerance, computed locally in your browser.
Open ToolResume Bullet Builder
Build resume bullets with an action verb, responsibility, and measurable result formula, then copy several polished template options in your browser.
Open ToolReview Schema Generator
Free review schema generator that runs locally in your browser.
Open ToolRight Triangle Calculator
Free right triangle calculator: find the hypotenuse, area, and angles from two legs, in your browser.
Open ToolRock Paper Scissors
Free rock paper scissors game: play against the computer and keep score, all running in your browser.
Open ToolRunning Key Cipher
Free running key cipher adds or subtracts a nonrepeating passage at least as long as the message. Runs in your browser; no uploads or accounts are used.
Open ToolSample Excess Kurtosis
Free sample excess kurtosis calculator using the unbiased Fisher correction to compare tail weight with a normal model privately in your browser.
Open ToolSample Skewness Calculator
Free sample skewness calculator using the adjusted Fisher-Pearson coefficient to quantify asymmetry in pasted data, entirely in your browser.
Open ToolSavings Goal Calculator
Free savings goal calculator that estimates monthly savings needed to hit a target amount by a deadline. Runs locally in your browser for private planning.
Open ToolScope Creep Cost Estimator
Free scope creep cost estimator that converts extra requests, hours, rate, and delay risk into a project impact estimate. Runs locally in your browser for...
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