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3633 apps · Showing 1825–1920

Data & Calculators: Measure & Navigate

GeoJSON · CalculateMap Point Distance CalculatorFind the earth distance between two longitude and latitude pairs.GeoJSON · CalculatePoint Along Route FinderPlace a point at an exact distance from the start of a GeoJSON route.

Data & Calculators: Select & Compare

GeoJSON · CalculateGeoJSON Line Intersection FinderFind every point where two GeoJSON lines cross each other.GeoJSON · CheckGeoJSON Point Cluster AnalyzerGroup a point collection with K-means or DBSCAN and add a cluster number to every point.GeoJSON · CheckGeoJSON Polygon Overlap CheckerCheck whether two polygons touch or overlap, and draw the shared area when one exists.GeoJSON · CalculateNearest Map Point FinderCompare one target coordinate with a GeoJSON point list and find the closest point.GeoJSON · CalculateNearest Point on Route FinderFind the closest spot on a GeoJSON route to any longitude and latitude point.GeoJSON · CheckPoint in Polygon CheckerCheck whether a longitude and latitude point is inside a GeoJSON polygon.GeoJSON · CheckPoints in Polygon FilterKeep only the GeoJSON points that fall inside a polygon or multipolygon.

Data & Calculators: Shape & Transform

GeoJSON · GenerateConvex Hull MakerDraw the smallest simple convex polygon that wraps around a set of points.GeoJSON · ConvertGeoJSON Bounding Box ClipperCut a line or polygon so only the part inside a bounding box remains.GeoJSON · GenerateGeoJSON Buffer MakerDraw a set-distance zone around a point, line, or polygon.GeoJSON · GenerateGeoJSON Line Offset MakerCreate a new line a set distance to one side of a GeoJSON route.GeoJSON · GenerateGeoJSON Polygon Difference MakerRemove the second polygon from the first and keep the area that remains.GeoJSON · GenerateGeoJSON Polygon Dissolve MakerMerge touching polygons that share the same group property and keep separate groups apart.GeoJSON · GenerateGeoJSON Polygon Intersection MakerCreate the map area that two polygons have in common.GeoJSON · GenerateGeoJSON Polygon Union MakerCombine two or more polygons into one polygon or multipolygon result.GeoJSON · CreateGeoJSON Rotate Scale and Move ToolRotate a map shape, scale it from its centre, and move it by distance and bearing.GeoJSON · GenerateGeoJSON Route Slice MakerCut out the part of a GeoJSON route between two distances from its start.GeoJSON · ConvertGeoJSON SimplifierRemove extra coordinates while keeping the main shape of a line or polygon.

Data & Calculators: Grids & Patterns

GeoJSON · GenerateGeoJSON Circle Polygon MakerTurn a centre point and radius into a GeoJSON polygon that follows ground distance.GeoJSON · GenerateGeoJSON Sector Shape MakerCreate a pie-slice map polygon from a centre, radius, start bearing, and end bearing.GeoJSON · GenerateHexagon Map Grid MakerCreate a flat-top hexagon GeoJSON grid for sampling, planning, or map analysis.GeoJSON · GenerateMap Point Grid MakerCreate evenly spaced GeoJSON points inside a map bounding box.GeoJSON · GenerateRandom GeoJSON Point GeneratorCreate any number of random GeoJSON points inside a bounding box for tests and demos.GeoJSON · GenerateSquare Map Grid MakerCreate an even square GeoJSON grid inside any west, south, east, and north box.GeoJSON · GenerateVoronoi Map MakerSplit a map into cells so every place belongs to its nearest input point.

Data & Calculators: View & Inspect

CSV · ViewCSV ViewerOpen a CSV or TSV file as a clear table, search the rows, and check basic file details without uploading it.

Data & Calculators: Clean & Organize

CSV · OptimizeCSV CleanerTrim extra spaces, remove empty rows and columns, and repair uneven CSV data in one private pass.CSV · OrganizeCSV Column PickerChoose, reorder, and export only the CSV columns you want while leaving the original file untouched.CSV · OrganizeCSV SorterSort a CSV by any column from A to Z, Z to A, smallest to largest, or largest to smallest.CSV · OptimizeRemove Duplicate CSV RowsFind repeated CSV rows by every column or the columns you choose, then keep one clear copy of each row.

Data & Calculators: Convert

CSV · ConvertCSV Delimiter ConverterChange commas, tabs, semicolons, or pipes without breaking quoted text, commas inside cells, or line breaks.CSV · ConvertCSV to JSON ConverterConvert CSV or TSV rows into clean JSON objects, with each heading used as a clear field name.JSON · ConvertJSON to CSV ConverterConvert a JSON object or list of objects into a spreadsheet-ready CSV with one column for every field.

Data & Calculators: Combine & Split

CSV · OrganizeMerge CSV FilesCombine CSV files into one table, match columns by heading, and leave a blank when a file is missing a value.CSV · OrganizeSplit CSVBreak one large CSV into smaller files with the same headings and the exact number of rows you choose.

Data & Calculators: Date Calculators

Calculator · CalculateAge CalculatorFind an exact age in years, months, and days, plus the next birthday and useful age milestones.Calculator · CalculateBusiness-Day CalculatorCount workdays or add business days using your workweek and a custom holiday list.Calculator · CalculateDate Difference CalculatorMeasure the exact time between two moments in calendar units, hours, minutes, and seconds.Calculator · CalculateDays Between Dates CalculatorCount calendar days between two dates with clear start-day and end-day inclusion choices.

Data & Calculators: Everyday Math

Calculator · CalculatePercentage CalculatorSolve percentage questions, changes, increases, and decreases with the formula shown in plain language.Converter · ConvertUnit ConverterConvert length, weight, temperature, area, volume, speed, time, data, energy, and pressure units.

Data & Calculators: Clocks & Timers

Timer · CountCountdown TimerCount down a duration or a future date with quick presets, pause controls, and an optional finish sound.Timer · CountStopwatchTime anything with a precise stopwatch, lap splits, best and slowest laps, and keyboard controls.Clock · ViewWorld Clock & Meeting PlannerCompare live local times around the world and find a meeting time that lands on the right day.

Data & Calculators: Business Pricing

Calculator · CalculateMobile Massage Travel Fee CalculatorPrice mobile visits from true trip costs, an included radius, minimum fees, income goals, and groups, then copy a three-zone policy.

Data & Calculators: Business Calculators

Calculator · CalculateCamp Pricing & Break-Even CalculatorTry different prices and group sizes. See how many bookings could cover your costs.Calculator · CalculateMassage Room Rent vs Commission CalculatorCompare room rent and commission across working weeks, recovered no-show fees, full costs, hourly earnings, and client break-even.Calculator · CalculateNo-Show Cost, Deposit & Cancellation Window CalculatorCalculate revenue and time lost to no-shows, then optimize a practical deposit, cancellation window, and the net ROI of reminders or a waitlist.

Data & Calculators: Averages & Centers

Numbers · CalculateArithmetic Mean FinderAdd a list of numbers and divide by how many values it has.Numbers · CalculateGeometric Mean FinderFind the geometric mean of positive numbers such as growth factors.Numbers · CalculateHarmonic Mean FinderFind the harmonic mean of positive rates or ratios.Numbers · CalculateLog Average FinderFind an average in log space for positive values that span a wide range.Numbers · CalculateMost Common Number FinderFind the number that appears most often in a list.Numbers · CalculateNumber List Extent FinderFind both ends of a number list and the distance between them.Numbers · CalculateNumber List Median FinderSort a number list and find the value in its middle.Numbers · CalculateNumber List Product FinderMultiply all numbers in a list and show the final product.Numbers · CalculatePrecise Number List SumAdd many values with a method that reduces floating-point rounding loss.Numbers · CalculateRoot Mean Square FinderSquare, average, and take the root to measure the size of changing values.

Data & Calculators: Biology Calculators

Calculator · CalculateCell Population Doubling Time & Continuous Growth RateCalculate exponential doubling time and continuous growth rate from a rising cell count or concentration measured over a positive time interval.Calculator · CalculateCell Suspension Dilution: Concentration & VolumeBalance cell concentration and volume before and after dilution using conservation of cell count and compatible volume units.Calculator · CalculateDNA Insert Mass from Vector Mass & Molar RatioCalculate insert DNA mass from vector mass, fragment lengths and a chosen insert-to-vector molar ratio, with bp/kb and mass unit choices.Calculator · CalculateExponential Bacterial Growth & Doubling TimeRelate initial and final populations, elapsed time, hourly fractional growth and doubling time during ideal exponential growth.Calculator · CalculateField Coverage from Width, Speed & OverlapEstimate area covered per hour and moving time from implement width, travel speed and overlap, with acre and hectare conversion.Calculator · CalculateLog Reduction, Surviving Count & Percent ReductionConvert positive before-and-after counts into decimal-log and percentage reductions, including inverse count calculations.Calculator · CalculateObserved Mutant Fraction of a PopulationCalculate observed mutant frequency from mutant and total counts, or recover a count from the fraction.Calculator · CalculateqPCR Standard-Curve Efficiency & Amplification FactorConvert a negative standard-curve slope to amplification factor and apparent qPCR efficiency, or recover slope from the factor.

Data & Calculators: Camp Operations

XLSX · CalculateCamp Staffing PlannerPlan your team, shifts and breaks. Spot times when you need more help.

Data & Calculators: Charts & Data

Vega-Lite / SVG / JSON · ConvertChart Specification PlaygroundEdit a Vega-Lite chart in JSON. Preview changes, check errors and download the chart as SVG or its settings as JSON.Editable SVG / PNG / JSON · ConvertCustom Infographic BuilderMake an infographic from CSV data. Choose bars, dots or number cards, edit the artwork and download SVG or PNG images.CSV / JSON / SVG / PNG · ConvertData Quality VisualizerCheck CSV data for missing values, duplicate rows and unusual numbers. Explore charts and download a column report.Slides / HTML / JSON · ConvertData Story Slide BuilderTurn data into a slide presentation. Add charts and notes, arrange slides and download a presentation that opens in a browser.Vega-Lite / SVG / JSON · ConvertDeclarative Chart BuilderBuild a Vega-Lite chart from CSV data. Choose columns, chart marks and summaries, then save the chart and its settings.Functions / JSON / SVG / PNG · ConvertFunction Graphing PadPlot up to six math functions together. Change values and graph ranges, zoom in and download the chart.CSV / JSON / SVG / PNG · ConvertHierarchical Data ExplorerShow nested JSON as a treemap, sunburst or icicle chart. Open each branch to explore its values and save an image.CSV / JSON / SVG / PNG · ConvertInteractive Chart StudioMake bar, line, scatter, pie and other charts from CSV data. Choose columns, group values and save your chart project.CSV / JSON / SVG / PNG · ConvertMeasured Data Surface ViewerTurn x, y and z measurements into a 3D surface. Rotate the view, add contour lines and download the chart.CSV / JSON / SVG / PNG · ConvertPersonal History TimelineMake a timeline of personal events. Add dates, groups and notes, then search your history and save an editable copy.CSV / JSON / SVG / PNG · ConvertPersonal Progress DashboardTrack reading, habits and projects with charts. Add entries, set targets and save a copy of your dashboard.CSV / JSON / SVG / PNG · ConvertProject Milestone ViewerSee project milestones on a timeline. Add dates and notes, group related work and focus on a chosen date range.CSV / JSON / SVG / PNG · ConvertSensor Comparison DashboardCompare sensor readings on shared or separate charts. Pick a time range and review missing values and number summaries.CSV / JSON / SVG / PNG · ConvertSmall Multiples ExplorerCompare groups of data in matching charts. Use histograms, box plots or violin plots with the same number scale.CSV / JSON / SVG / PNG · ConvertTime-Series Log ViewerPlot timestamped CSV measurements over time. Zoom into a range, spot gaps and download a summary of the selected data.

Data & Calculators: Chemistry Calculators

Calculator · CalculateAcid pKa from Ka or Buffer MeasurementsCalculate pKa from a positive acid dissociation constant or estimate it separately from buffer pH and component concentrations.Calculator · CalculateActual Yield, Theoretical Yield & Recovery PercentageRelate measured product mass, theoretical product mass and their percentage ratio.Calculator · CalculateAir-to-Fuel Mass Ratio & Fuel PresetsRelate air mass, fuel mass and their ratio with fixed fuel presets or a custom air-to-fuel ratio.Calculator · CalculateArrhenius Rate, Temperature & Activation EnergySolve the Arrhenius relation for activation energy, first-order rate constant, frequency factor or absolute temperature with reversible unit conversion.Calculator · CalculateAvogadro Atoms, Moles & Sample MassConvert between atom count, amount in moles and sample mass using the exact Avogadro constant and your entered molar mass.Calculator · CalculateBinary Mixture Mole Fraction & MolalityFind solute mole fraction and mole percent in a two-component mixture, with optional molality from solvent molar mass.Calculator · CalculateBuffer pH, Acid–Base Ratio & pKaSolve the Henderson–Hasselbalch relationship between weak-acid buffer pH, pKa and the conjugate-base-to-acid concentration ratio.Calculator · CalculateChromatography Bed, Flow & Residence TimeCalculate nominal bed residence time from linear flow velocity or cylindrical bed dimensions and volumetric flow.Calculator · CalculateCOD from Blank and Sample TitrationsCalculate an uncorrected titrimetric chemical oxygen demand from blank/sample FAS volumes, normality and sample aliquot volume.Calculator · CalculateConserved-Solute Concentration & VolumeSolve the concentration-volume balance for a fixed amount of solute before and after a volume change.Calculator · CalculateCubic Crystal Plane Spacing & Miller IndicesCalculate interplanar spacing for a cubic lattice from its lattice constant and signed integer Miller indices, with material presets.Calculator · CalculateDilute-Water pH, pOH & Hydrogen-Ion EstimateConvert pH, pOH and approximate hydrogen-ion concentration in dilute water using pKw = 14 near 25°C.