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.
Query String Builder
Build URL query strings from key value rows with proper encoding, repeated keys, and optional base URL output.
Open ToolQuote Style Converter
Free quote style converter for switching single, double, and backtick string wrappers while escaping inner quotes locally.
Open ToolQuoted-Printable Converter
Encode UTF-8 text as quoted-printable or decode hexadecimal escapes and soft line breaks with strict validation, all locally in your browser.
Open ToolRail Fence Cipher
Free rail fence cipher: encode or decode text with a zigzag transposition across a chosen number of rails, entirely in your browser.
Open ToolRain Barrel Yield Calculator
Free rain barrel yield calculator with labeled inputs and an immediate result. It estimates roof runoff from rainfall depth privately in your browser.
Open ToolRamp Slope ADA Calculator
Calculate ramp run from rise and slope ratio, then compare against the common 1 to 12 guideline. It runs entirely in your browser, with no uploads or accounts.
Open ToolRandom MAC Address Generator
Free random MAC address generator: create valid locally-administered MAC addresses in common formats, in your browser.
Open ToolRandom Number Generator
Free random number generator: pick numbers in any range, with an option for unique draws, generated in your browser.
Open ToolRandom Palette Generator
Free random palette generator with lockable swatches, Bright, Pastel, and Deep modes, and copy-ready hex colors for quick design exploration.
Open ToolRange Calculator
Free range calculator: find the range, minimum, maximum, and midrange of a data set, in your browser.
Open ToolRatio Simplifier
Free ratio simplifier that converts values instantly in your browser. Includes examples, formulas, limits, copy-ready output, and local privacy.
Open ToolReact Prop Table
Turn prop definitions into a Markdown table for React component docs with a live preview and one-click copy. Free and private — nothing is uploaded.
Open ToolReadability Scores
Free readability checker: score text with Flesch, Flesch-Kincaid, Gunning Fog, SMOG, Coleman-Liau, and ARI at once, in your browser.
Open ToolReading Assignment Pace Calculator
Calculate pages per day from total pages and days available. Everything is computed locally in your browser, with no uploads and no sign-ups.
Open ToolReading Time Calculator
Estimate reading time from pasted text.
Open ToolRecipe Scaler
Free recipe scaler: resize any ingredient list up or down by servings, handling fractions, computed locally in your browser.
Open ToolRedirect Chain Planner
Plan old-to-new URL redirects and produce a clean redirect map.
Open ToolReferral Bonus Pool Calculator
Calculate a referral bonus and the net after payout from new revenue and a bonus rate. It runs entirely in your browser — no uploads or accounts.
Open ToolReferral Request Email Generator
Generate polite referral request emails for clients, colleagues, and partners.
Open ToolRegex Builder Visual
Free visual regex builder for common pattern pieces. Compose a pattern from options and test it locally in your browser.
Open ToolRegex Replacement Preview
Preview regex replacement 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 ToolRegex Test Case
Build regex test case 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 ToolRelativistic Time Dilation Calculator
Calculate Lorentz factor and dilated coordinate time from proper time and speed as a fraction of light, with private math in your browser safely now.
Open ToolRelease Notes Section
Work with release notes section in your browser with a live preview and one-click copy — free and private, generated locally in your browser with no upload.
Open ToolRem to Px Converter (with Chart)
Convert rem to px and px to rem instantly at any root font size, with a quick reference chart of common values. Free and private in your browser.
Open ToolRemove Duplicate Words
Free remove duplicate words for cleaning, transforming, and checking pasted text. Process content locally in your browser without uploads.
Open ToolRemove Extra Spaces
Free remove extra spaces for cleaning, transforming, and checking pasted text. Process content locally in your browser without uploads.
Open ToolRemove Line Breaks
Free remove line breaks for cleaning, transforming, and checking pasted text. Process content locally in your browser without uploads.
Open ToolRemove Non-ASCII Characters
Free non-ASCII character remover keeps code points zero through 127 and drops the rest. Runs in your browser; no uploads or accounts are used.
Open ToolRemove Punctuation from Text
Free punctuation remover strips Unicode punctuation while retaining letters, numbers, symbols, and spacing. Runs privately in your browser without any uploads.
Open ToolReorder PDF Pages
Rearrange the pages of a PDF in your browser using page thumbnails and a custom order, then download the result. Your file is never uploaded to a server.
Open ToolReverse Each Word
Free tool to reverse the letters of each word while keeping word order, computed locally in your browser.
Open ToolReverse Percentage Calculator
Free reverse percentage calculator: find the original amount before a percentage was added or removed, in your browser.
Open ToolRevision Policy Generator
Create a simple revision policy for proposals, service pages, and client onboarding.
Open Toolrevolution/minute to hertz Converter
Free revolution/minute to hertz converter with exact frequency math, reverse conversion, copy-ready output, and a quick reference table in your browser.
Open ToolReynolds Number Calculator
Calculate Reynolds number from density, speed, characteristic length, and dynamic viscosity, with a pipe-flow guide in your browser safely now.
Open ToolRice Water Ratio Calculator
Free rice to water ratio calculator: find the right water for any amount and type of rice, computed locally in your browser.
Open ToolRisk Reward Calculator
Calculate trade risk, reward, ratio, and break-even win rate from entry, stop, and target. It runs entirely in your browser — no uploads or accounts.
Open ToolRoad Trip Fuel Calculator
Calculate gallons needed from trip distance and fuel economy. Everything is computed locally in your browser, with no uploads and no sign-ups.
Open ToolROAS Calculator
Free ROAS calculator that divides revenue by ad spend and shows return on ad spend, profit estimate, and break-even target. Runs locally in your browser for...
Open ToolRobots Meta Tag
Build robots meta tag 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 ToolRobots Txt Rule
Preview robots.txt allow and disallow lines for selected user agents. A staging path can be disallowed for all crawlers while assets remain allowed.
Open ToolRobots.txt Generator
Free robots.txt generator that runs locally in your browser.
Open ToolROI Calculator
Free ROI calculator: estimate a project's return on investment over a year from its benefits, upfront cost, and monthly cost, privately in your browser.
Open ToolRoof Pitch Calculator
Free roof pitch calculator: enter rise and run to get the pitch ratio, angle in degrees, and rafter slope factor, computed locally in your browser.
Open ToolRotate PDF
Rotate all or selected pages of a PDF in your browser and download the fixed file. Your document is never uploaded, keeping it private on your device.
Open ToolRule of 72 Calculator
Free Rule of 72 calculator that estimates doubling time from an annual return or interest rate. Runs locally in your browser for private planning.
Open ToolSalary Inflation Adjuster
Free salary inflation adjuster that compares old salary, new salary, inflation rate, and real purchasing power. Runs locally in your browser for private...
Open ToolSales Email Subject Ideas
Free sales email subject idea generator with curiosity, benefit, urgency, referral, and direct subject line formulas. Runs locally in your browser for...
Open ToolSalt Baker Percent Calculator
Calculate salt weight from flour weight and a salt baker’s percentage. Everything is calculated locally in your browser, with no uploads or sign-ups.
Open ToolSample Count Calculator
Calculate the total samples from a duration and a sample rate. Everything is computed locally in your browser, with no uploads and no sign-ups.
Open ToolSatoshi BTC Converter
Convert between satoshis and BTC exactly with manual units and no price lookup or network request. It runs locally in your browser with no uploads.
Open ToolSatoshi to Bitcoin Converter
Free satoshi to bitcoin converter with labeled inputs and an immediate result. It converts between satoshis and bitcoin units privately in your browser.
Open ToolScanned PDF to Text (OCR)
Run OCR on a scanned or image-only PDF in your browser to pull out the text, then copy or download it. Your file is never uploaded to any server.
Open ToolSchema Course
Build schema course 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 ToolSchema Event Series
Build schema event series 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 ToolScientific Notation Converter
Free scientific notation converter that converts values instantly in your browser. Includes examples, formulas, limits, copy-ready output, and local privacy.
Open ToolSelf Employment Tax Calculator
Estimate US self-employment tax from net earnings using the 92.35 percent base and 15.3 percent rate. It runs locally in your browser with no uploads.
Open ToolSemantic Version Bumper
Free semantic version bumper for previewing major, minor, patch, and prerelease changes locally in your browser.
Open ToolSequential Color Scale
Generate sequential color scale in your browser with a live preview and one-click copy — free and private, generated locally in your browser with no upload.
Open ToolSERP Intent Classifier
Classify pasted search results by informational, commercial, transactional, or navigational intent.
Open ToolService Worker Cache List
Generate service worker precache arrays from pasted asset paths. A static app can prepare shell routes, CSS, and logo paths for an install cache.
Open ToolSet-Cookie Header Builder
Free Set-Cookie header builder that validates names, paths, lifetime, SameSite, Secure, HttpOnly, and value encoding with clear errors in your browser.
Open ToolSignificant Figures Calculator
Free significant figures calculator: round a number to a chosen number of significant figures, in your browser.
Open ToolSimple Interest Calculator
Free simple interest calculator that estimates interest and final amount from principal, rate, and time. Runs locally in your browser for private planning.
Open ToolSimple Pivot Table Builder
Free simple pivot table builder that groups CSV rows by one column and counts or sums another. Summarize pasted data locally as CSV output now.
Open ToolSitemap Index Builder
Free sitemap index builder that combines child sitemap URLs into a valid XML sitemapindex file with optional lastmod dates for SEO. Runs locally.
Open ToolSitemap Url List Cleaner
Clean pasted URL lists for sitemap drafts by trimming duplicates and sorting paths. Free and private in your browser, with nothing uploaded and no account.
Open ToolSKU Generator
Generate simple SKU patterns from product, category, color, size, and sequence notes.
Open ToolSlope Calculator
Free slope calculator: find the slope, angle, and equation of a line through two points, computed locally in your browser.
Open ToolSlug Pattern Tester
Test slug pattern 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 ToolSoundex Encoder
Free Soundex encoder creates four-character surname keys with the standard American rules. Runs in your browser; no uploads or accounts are used.
Open ToolSpacebar Speed Test
Count spacebar presses over a timed run with duration choices, live presses per second, key repeat filtering, final score, and saved personal best.
Open ToolSpecific Gravity Calculator
Free specific gravity calculator: find specific gravity from density relative to water, in your browser.
Open ToolSpeech To Text Dictation
Free speech to text dictation tool using supported browser recognition. Capture spoken notes into editable text locally.
Open ToolSpeed, Distance & Time Calculator
Free speed distance time calculator: solve any one of speed, distance, or time from the other two, in your browser.
Open ToolSphere Volume Calculator
Free sphere volume calculator: find the volume and surface area of a sphere from its radius, in your browser.
Open ToolSplit the Bill Calculator
Free split the bill calculator: add a tip and divide a restaurant bill evenly among people, in your browser.
Open ToolSpring Frequency Calculator
Free spring frequency calculator with labeled inputs and an immediate result. It finds ideal mass-spring natural frequency privately in your browser.
Open Toolsq inch to sq centimeter Converter
Free sq inch to sq centimeter converter with exact area math, reverse conversion, copy-ready output, and a quick reference table in your browser.
Open ToolSQL Formatter
Free SQL formatter that adds line breaks around common clauses and keywords. Pretty-print simple queries locally.
Open ToolSQL Where Clause
Convert SQL where clause 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 ToolSquare Feet to Square Meters
Convert square feet to square meters and square meters to square feet using the exact area factor, with precise results calculated in your browser.
Open ToolStandard Error Calculator
Free standard error of the mean calculator from a data set, computed locally in your browser.
Open ToolStanding Wave Calculator
Calculate harmonic frequency and wavelength for a string or open-open pipe from length, wave speed, and harmonic number locally in your browser.
Open ToolStirling Number Calculator
Free Stirling number of the second kind calculator counting partitions of n labeled objects into k nonempty unlabeled groups in your browser.
Open ToolStraddling Checkerboard Cipher
Free straddling checkerboard cipher assigns variable-length digit codes from two row markers. Runs in your browser; no uploads or accounts are used.
Open ToolString Normalization Inspector
Inspect string normalization in your browser with a live preview and one-click copy — free and private, generated locally in your browser with no upload and.
Open ToolString Unescaper
Free string unescaper for common escaped text snippets. Decode JSON-style, HTML entity, and slash escape strings locally.
Open ToolStructured Data Type Finder
Free structured data type finder that recommends Schema.org types based on page purpose, content features, and business context. Runs locally.
Open ToolStudy Block Planner
Calculate minutes per block from total study time and a block count. Everything is calculated locally in your browser, with no uploads or sign-ups.
Open ToolSubnet Mask Converter
Free subnet mask converter: turn a CIDR prefix into a dotted mask, wildcard, host count, and binary, in your browser.
Open ToolSugar Grams to Cups Converter
Convert granulated sugar grams to US cups and cups to grams using a 200-gram kitchen convention, with practical results calculated in your browser.
Open ToolSum of Squares Calculator
Free sum of squares calculator: find the total sum of squared deviations from the mean, in your browser.
Open ToolSupport Response Template Generator
Generate calm support response templates for common customer issues, follow-ups, refunds, and bug reports.
Open ToolSVG App Store Icon Frame
Generate rounded SVG app icon frames with grid guides and safe padding with a live preview and one-click copy. Free and private — nothing is uploaded.
Open ToolSVG Bar Chart Icon
Generate SVG bar chart icons with adjustable bar count, gap, and height. An analytics card can use three rising bars beside a metric label. In your browser.
Open ToolSVG Blob Cluster Generator
Generate SVG blob cluster 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 ToolSVG Brick Pattern Generator
Generate SVG brick pattern 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 ToolSVG Certificate Border
Create SVG certificate border in your browser with a live preview and one-click copy — free and private, generated locally in your browser with no upload and.
Open ToolSVG Clip Path Polygon
Build SVG clip path polygon 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 ToolSVG Corner Fold
Build an SVG folded-corner overlay for cards, documents, and preview thumbnails. Free and private in your browser, with nothing uploaded and no account.
Open ToolSVG Crosshatch Pattern
Create SVG crosshatch pattern fills with spacing, angle, stroke, and opacity controls. Free and private in your browser, with nothing uploaded and no account.
Open ToolSVG CSS Mask Generator
Generate SVG CSS mask 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 ToolSVG Dot Grid Pattern
Create SVG dot grid patterns with spacing, radius, color, and opacity controls. Free and private in your browser, with nothing uploaded and no account.
Open ToolSVG Duotone Filter
Generate SVG duotone filter 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 ToolSVG Gradient Mesh Placeholder
Generate layered SVG gradient blobs that mimic a soft mesh background. A hero mockup can use three overlapping gradients as a placeholder background.
Open ToolSVG Hexagon Pattern Generator
Generate SVG hexagon pattern in your browser with a live preview and one-click copy — free and private, generated locally in your browser with no upload and.
Open ToolSVG Icon Button Bg
Create SVG button backgrounds with circular, square, and pill shapes for icons. Free and private in your browser, with nothing uploaded and no account.
Open ToolSVG Isometric Grid
Generate SVG isometric grid lines for product diagrams and architecture sketches. Free and private in your browser, with nothing uploaded and no account.
Open ToolSVG Logo Lockup Spacing
Create SVG logo lockup spacing in your browser with a live preview and one-click copy — free and private, generated locally in your browser with no upload and.
Open ToolSVG Mask Luminance
Preview an SVG luminance mask where white reveals and black hides artwork. Everything runs locally in your browser with nothing uploaded and no account needed.
Open ToolSVG Noise Texture
Generate SVG turbulence noise textures for soft paper, grain, and overlay effects. Free and private in your browser, with nothing uploaded and no account.
Open ToolSVG Octagon Badge
Build SVG octagon badges for warnings, tags, and status markers. A stop-style status badge can use an eight-sided shape with a short label. In your browser.
Open ToolSVG Organic Blob Set
Generate a small set of SVG organic blob shapes with shared colors. A feature section can scatter three related blobs behind icons. Private, in your browser.
Open ToolSVG Path Translate Transformer
Create SVG path translate transformer in your browser with a live preview and one-click copy — free and private, generated locally in your browser with no.
Open ToolSVG Pause Icon
Create SVG pause icons with adjustable bar width, gap, radius, and button backing. Free and private in your browser, with nothing uploaded and no account.
Open ToolSVG preserveAspectRatio Previewer
Use this free SVG preserveaspectratio previewer in your browser to preview SVG meet slice alignment and preserveAspectRatio. Output stays private and local.
Open ToolSVG Radar Chart
Create SVG radar chart 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 ToolSVG Radial Burst Generator
Generate SVG radial burst 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 ToolSVG Ribbon Badge
Create SVG ribbon badge shapes with folded tails, fill color, and label area. Free and private in your browser, with nothing uploaded and no account.
Open ToolSVG Scallop Edge
Create SVG scalloped edges for coupons, labels, and decorative dividers. A voucher header can use repeating semicircle cuts along the bottom edge.
Open ToolSVG Social Avatar
Work with SVG social avatar 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 ToolSVG Sparkle Icon
Generate SVG sparkle icons with point size, rotation, and accent color controls. A new-feature badge can use a small sparkle beside the label.
Open ToolSVG Squircle
Create SVG squircle shapes for app icons, cards, and soft badges. An app icon placeholder can use a superellipse-style rounded square. Private, in your browser.
Open ToolSVG Text On Path
Create SVG text on path 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 ToolSVG Timeline Marker
Create SVG timeline marker 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 ToolSVG Underline Swoosh
Create SVG hand-drawn underline swooshes for headings and callouts. A landing page headline can get a curved accent underline beneath one phrase.
Open ToolSVG Upload Icon
Generate SVG upload icons with arrow, tray, and cloud-style variants. An attachment dropzone can show an upward arrow above a tray. Private, in your browser.
Open ToolSVG Viewport Grid Overlay
Build SVG viewport grid overlays for screenshots, layout review, and responsive mockups. Free and private in your browser, with nothing uploaded and no account.
Open ToolSVG Waves Pattern Generator
Generate SVG waves pattern 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 ToolSVG Zigzag Divider
Create SVG zigzag section dividers with amplitude, spacing, and color controls. A feature section can use a small zigzag edge to separate content bands.
Open ToolSwatch to SCSS Map
Free swatch to SCSS map converter that turns pasted hex colors into a Sass map for reusable design tokens and themes.
Open ToolSweat Rate Calculator
Calculate sweat rate from fluid lost and hours exercised. Everything is computed locally in your browser, with no uploads and no sign-ups.
Open ToolSyllable Counter
Free syllable counter for cleaning, transforming, and checking pasted text. Process content locally in your browser without uploads.
Open ToolSynthetic Division Calculator
Free synthetic division calculator that divides polynomial coefficients by x minus k and reports the quotient and remainder instantly in your browser.
Open ToolSyrup Ratio Calculator
Calculate water and total syrup from sugar weight and a sugar-to-water ratio. Everything is calculated locally in your browser, with no uploads or sign-ups.
Open ToolTailwind Class Sort
Sort Tailwind-style class strings into a readable layout, spacing, color, and state order. Free and private in your browser, with nothing uploaded.
Open ToolTailwind To Plain CSS
Free Tailwind to plain CSS mapper for common utility classes. Convert frequent spacing, display, color, and type classes locally.
Open ToolTap BPM Tester
Free tap BPM tester: tap along to a song to measure its tempo in beats per minute, in your browser.
Open ToolTarget Price Calculator
Free pricing calculator: find the selling price that hits a target gross margin from your unit cost, computed locally in your browser.
Open ToolTDEE Calculator
Free TDEE calculator that estimates BMR, applies an activity factor, and shows daily maintenance calories with the formula visible in your browser.
Open Tooltebibyte to gibibyte Converter
Free tebibyte to gibibyte converter with exact data math, reverse conversion, copy-ready output, and a quick reference table in your browser.
Open ToolTemperature Converter
Free temperature converter that converts values instantly in your browser. Includes examples, formulas, limits, copy-ready output, and local privacy.
Open Toolterabyte to gigabyte Converter
Free terabyte to gigabyte converter with exact data math, reverse conversion, copy-ready output, and a quick reference table in your browser.
Open ToolTerminal Velocity Calculator
Calculate ideal terminal velocity from mass, fluid density, projected area, drag coefficient, and gravity using local math in your browser safely now.
Open ToolText Indenter
Free text indenter for cleaning, transforming, and checking pasted text. Process content locally in your browser without uploads.
Open ToolText to Binary Converter
Free text to binary converter: turn text into 8-bit binary and decode binary back to text, computed in your browser.
Open ToolText to Braille Converter
Free text to Braille converter: turn letters and numbers into Unicode Grade 1 Braille patterns, and decode them back, in your browser.
Open ToolText to Image Generator
Free text to image generator: turn a line of text into a PNG image with custom colours and size, in your browser.
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