01
Designer
Check colours, fit the layout and make room for the details.
Image colour palette extractorImage comparison sliderColour converter+6 more
ONE PERSON. MANY HATS.
Tools for the things
you do.
Start with a collection that fits your day.
Make it yours, then make it your homepage.
Find your starting point.
102 starter toolboxes
02
Writer & editor
Keep an eye on words, reading time and the next deadline.
Word & character counterReading & speaking timeText case converter+3 more
03
Student
A practical desk for essays, numbers and everyday conversions.
Assignment grade calculatorRequired final exam gradeStudy time allocation planner+7 more
04
Small business owner
Check discounts, tidy your copy and keep dates in view.
Invoice line-item calculatorCash runway calculatorWorking capital calculator+8 more
05
Home & DIY
Measure twice, convert once. Keep the useful numbers close.
Room layout plannerRoom area plannerPaint calculator+6 more
06
Cook & host
Scale the recipe, translate the units and share the bill.
Recipe scalerOven & fan temperature converterCooking schedule planner+5 more
07
Developer
Format, decode, inspect and generate. Keep the useful checks nearby.
JSON viewerJSON formatterBase64 encoder & decoder+6 more
08
Data analyst
Go from a CSV export to a clearer view of your numbers.
Join two CSV tablesCSV grouped summaryCSV column profile+6 more
09
Quilt layout maker
Plan block layouts, diagonal units, binding and repeatable fabric cuts.
Quilt block layout plannerHalf-square triangle cut plannerPatchwork strip cutting yield+3 more
10
Thread and weave planner
Budget warp, floss, knot cord and stitch-based project dimensions.
Weaving sett and reed plannerWeaving warp length budgetMacramé cord cutting budget+5 more
11
Garden season organiser
Build planting calendars and record measured seed and irrigation performance.
Garden sowing date worksheetSuccession planting scheduleSquare-foot garden grid+5 more
12
Kitchen batch organiser
Scale ingredient tables, compare brewing records and allocate prepared portions.
Recipe batch scaling tableIngredient composition tablePizza party portion planner+5 more
13
Community event organiser
Organise tables, volunteer roles and simple competition fixtures.
Party seating allocationVolunteer role rotationRound-robin fixture maker+4 more
14
Home project organiser
Turn measurements and inventories into cut lists, layouts and packing manifests.
Shelf carcass panel cut listPaver grid and edge-cut planWindow blind measurement worksheet+5 more
15
Data quality reviewer
Inspect dataset changes, rules and missingness before you share a table.
CSV dataset diffCSV rule validatorCSV missingness map+3 more
16
CSV workflow builder
Reshape private tables and package results into useful files.
CSV file splitterCSV calculated columnCSV rank and percentile+7 more
17
JSON integration tester
Inspect exact JSON values and test explicit document transformations.
JSON viewerJSON Pointer queryJSON Merge Patch+6 more
18
Location data preparer
Prepare longitude/latitude tables and inspect GeoJSON structures.
CSV points to GeoJSONGeoJSON structure inspectorGeoJSON points to CSV+3 more
19
Text corpus reviewer
Explore word contexts, repeated phrases and lexical patterns.
Text concordance / KWICN-gram frequency analyserLexical text similarity+5 more
20
Catalogue import preparer
Clean catalogue identifiers, check digits and generate import documents.
ISBN checksum and converterBarcode check digit calculatorLuhn checksum calculator+5 more
21
Mechanics learner
Explore elastic sections, deflection curves and transmission geometry.
Rectangle section propertiesElastic bending stressBeam deflection curves+7 more
22
Fluid systems learner
Track flow, head, pressure losses and ideal hydraulic power.
Pipe mean flow velocityPipe Reynolds numberDarcy pipe friction loss+7 more
23
Home energy budgeter
Compare energy budgets, battery runtime and simplified heat transfer.
Battery energy runtimeBattery series/parallel arithmeticSolar array energy budget+5 more
24
Orbital mechanics learner
Explore ideal rocket mass ratios, circular orbits and two-burn transfers.
Ideal rocket delta-vIdeal circular orbitCoplanar Hohmann transfer+5 more
25
Radio link learner
Check free-space loss, geometric clearance and conductor behaviour.
Free-space radio path lossFresnel zone clearanceConductor skin depth+5 more
26
Numerical analyst
Evaluate expressions, investigate convergence and fit private point data.
Adaptive numerical integrationNumerical derivative workspaceBracketed root finder+5 more
27
Geometry sketcher
Transform point sets, inspect intersections and export coordinate sketches.
Convex hull builderPolygon centroid calculatorPoint-in-polygon checker+5 more
28
Linear algebra learner
Inspect matrix factors, nullspaces and iterative solution traces.
Small matrix calculatorRow reduction, rank & nullspace2 × 2 eigenvalue calculator+5 more
29
3D graphics maths learner
Check rotation conventions, plane geometry and coordinate relationships.
3D Euler rotation workspaceQuaternion vector rotationPlane through three 3D points+5 more
30
Research visualiser
Compare distributions, inspect matrices and explain overlaps with private data.
Box plot builderCSV heatmap builderCSV chart builder+4 more
31
Decision facilitator
Make trade-offs explicit, compare choices and communicate the plan.
Weighted decision matrixVenn diagram builderProject timeline & Gantt chart+4 more
32
Visual data storyteller
Turn local rows into charts, timelines and clearer comparisons.
CSV heatmap builderBox plot builderCSV chart builder+7 more
33
Interactive science learner
Move beyond a result: change a model and watch its behaviour.
Interactive function plotterInteractive pendulum simulation3D vector calculator+5 more
34
Home space planner
Sketch a room, place furniture and prepare a practical plan.
Room layout plannerRoom area plannerLength converter+5 more
35
Circuit prototyper
Check ideal dividers, filter responses and small circuit building blocks.
Loaded voltage dividerTwo-branch current dividerLED series resistor calculator+9 more
36
Solution preparation
Keep concentration bases, dilution steps and ideal solution models clear.
Molality calculatorSolution dilution calculatorSerial dilution planner+8 more
37
Geometry & linear algebra
Explore coordinates, vector products, matrices and geometric constructions.
3D vector calculatorSmall matrix calculatorTriangle from sides & angles+6 more
38
Calendar planner
Plan recurring dates, working calendars and files for your calendar app.
Recurring date plannerAdd or subtract working daysWork calendar hours+6 more
39
Date data cleaner
Translate date formats, decode serials and compare explicit time intervals.
Date format converterExcel date serial converterISO week date to calendar date+7 more
40
Sewing & quilting
Plan fabric, measure shrinkage and finish the edges of a project.
Fabric shrinkage calculatorCurtain fabric plannerQuilt binding calculator+5 more
41
Knitting & crochet
Translate a finished swatch into a panel and compare yarn quantities.
Knitting & crochet gauge plannerYarn quantity substitutionLength converter+5 more
42
Woodworking & layout
Position repeated pieces, measure joints and estimate sawn-lumber volume.
Board feet calculatorEqual mitre angle calculatorEvenly spaced objects+6 more
43
Laboratory technician
Keep solution arithmetic, flow units and experiment summaries together.
Molar concentration converterAmount of substance converterMass & moles calculator+8 more
44
Lighting & display designer
Translate lighting units, compare display luminance and check visual layouts.
Illuminance converterLuminance converterColour contrast checker+6 more
45
Measurement engineer
Work with mechanical, electrical, thermal and magnetic measurements.
Acceleration converterAngular velocity converterElectric current converter+8 more
46
Freelancer
Price the work, check the numbers and prepare the handover.
Freelance hourly rate plannerInvoice line-item calculatorVAT add & remove calculator+6 more
47
Teacher
Prepare groups, explore numbers and organise classroom documents.
Interactive function plotterInteractive pendulum simulationName wheel spinner+11 more
48
Content creator
Fit the image, trim the copy and get the small assets ready.
Image resizerImage compressorAspect ratio calculator+4 more
49
Photographer
Crop, rotate and prepare copies of your images for sharing.
Image comparison sliderImage colour palette extractorExposure value calculator+10 more
50
Video creator
Plan the frame, prepare thumbnails and add up running times.
Aspect ratio calculatorImage resizerCrop image+4 more
51
Marketer
Compare changes, prepare campaign assets and check the copy.
Advertising campaign calculatorSales funnel calculatorCustomer acquisition cost+7 more
52
Project manager
Work through dates, durations, costs and shared documents.
Project timeline & Gantt chartMeeting availability overlapWork capacity planner+7 more
53
Office & admin
Tidy exports, sort documents and make everyday admin easier.
ZIP archive inspectorMerge PDFsSplit PDF into pages+6 more
54
Traveller
Translate prices, units and times before the next trip.
Currency converterTime zone viewerTemperature converter+4 more
55
Event planner
Plan dates, scale the food and share the useful details.
Name wheel spinnerDate differenceAdd or subtract days+5 more
56
Baker
Balance the dough, scale the batch and check the ingredient cost.
Sourdough starter feeding plannerDough ball batch plannerLoaf pan dough loading+7 more
57
Meal prepper
Scale portions, compare prices and line up the cooking.
Recipe scalerRecipe cost calculatorUnit price calculator+4 more
58
Household budgeter
See recurring costs, compare deals and plan a savings target.
Subscription cost calculatorUnit price calculatorMultiple discount calculator+4 more
59
Renovator
Turn room measurements into practical material estimates.
Room area plannerPaint calculatorWallpaper calculator+5 more
60
Maker & crafter
Measure, scale and cost the next thing you make.
Evenly spaced objectsBoard feet calculatorEqual mitre angle calculator+7 more
61
Runner
Translate pace, distance and duration for your next run.
Pace calculatorSpeed converterLength converter+3 more
62
Fitness planner
Keep adult energy estimates and basic measurement tools together.
BMI calculatorBMR calculatorTDEE calculator+3 more
63
Researcher
Inspect a dataset, summarise measurements and check relationships.
Descriptive statisticsSimple linear regressionCSV crosstab+4 more
64
Front-end developer
Check the interface details and prepare assets for the browser.
Colour contrast checkerColour converterPixels & rem converter+5 more
65
API developer
Inspect payloads, decode tokens and prepare test values.
JSON viewerJSON formatterJWT decoder+5 more
66
Print designer
Measure the artwork, adjust images and assemble a proof.
Paper grid cutting layoutPrint job quantity & costLength converter+7 more
67
Online seller
Price products, prepare listing images and compare offers.
Marketplace fee & price calculatorParcel dimensional weightReorder point calculator+8 more
68
Volunteer organiser
Arrange groups, share information and manage the small sums.
Name wheel spinnerAssignment grade calculatorCustom grade boundary checker+8 more
69
Language learner
Inspect practice text, compare drafts and pick a prompt.
Word & character counterText comparisonText case converter+4 more
70
Gardener
Plan the bed, measure the soil and make the most of the water.
Soil volume calculatorRaised bed fill calculatorPlant pot volume calculator+5 more
71
Landscaper
Estimate surfacing, boundaries and outdoor material quantities.
Gravel volume & mass calculatorMulch coverage calculatorFence post calculator+5 more
72
Maths student
Explore shapes, equations, sequences and sample statistics.
Two linear equations solverLinear equation solverQuadratic equation solver+6 more
73
Engineering student
Keep unit conversions and geometry checks beside your coursework.
Force converterTorque converterPressure converter+6 more
74
Spreadsheet user
Inspect, filter, sort and reshape a CSV before the next step.
CSV viewerSelect CSV columnsFilter CSV rows+5 more
75
Home energy planner
Understand appliance usage and estimate an electricity bill.
Appliance electricity costElectricity bill estimatorPower converter+4 more
76
Physics student
Check motion, energy, waves and the units behind each equation.
Constant acceleration calculatorIdeal projectile motionKinetic energy calculator+6 more
77
Chemistry student
Work through amounts, concentrations, gas pressure and heat.
Molar concentration converterAmount of substance converterMass & moles calculator+7 more
78
Electronics hobbyist
Explore ideal DC circuits, component networks and time constants.
Capacitance converterInductance converterElectrical resistance converter+8 more
79
Science teacher
Keep classroom examples, groups and experiment arithmetic together.
Newton’s second law calculatorKinetic energy calculatorSpecific heat energy calculator+5 more
80
Musician & songwriter
Explore pitches, spell scales and chords, and work out musical timings.
Musical note frequencyMusical interval calculatorNote list transposer+5 more
81
Guitarist & instrument maker
Map a tuning, explore fret positions and compare ideal string tension.
Guitar fretboard note finderInstrument fret position calculatorIdeal string tension calculator+4 more
82
Audio producer
Set tempo timings, compare gain and estimate sample and file sizes.
WAV waveform & trimmerTempo & delay time calculatorSwing timing calculator+7 more
83
Podcaster
Plan an episode, estimate audio storage and check a supplied loudness target.
Reading & speaking timeWord & character counterDuration adder+5 more
84
Music teacher
Explore pitch relationships, teach rhythm and plan practice time.
Musical scale builderChord note calculatorMusical interval calculator+5 more
85
Exam & revision planner
Work out grade targets and organise reading, video and review time.
Required final exam gradeAssignment grade calculatorExam score with negative marking+5 more
86
Bookkeeper
Check invoice arithmetic, inventory ratios and asset schedules.
Invoice line-item calculatorVAT add & remove calculatorWorking capital calculator+5 more
87
Finance student
Compare time-value equations, investment scenarios and repayment schedules.
Simple interest calculatorEffective annual rate calculatorInflation-adjusted return+5 more
88
Stock & fulfilment planner
Compare stock quantities, replenishment assumptions and parcel weights.
Inventory turnover calculatorEconomic order quantityReorder point calculator+5 more
89
Business founder
Explore cash runway, acquisition economics and a sales funnel.
Cash runway calculatorCustomer acquisition costCustomer value scenario+5 more
90
Statistics student
Explore distributions, confidence intervals, tests and robust summaries.
Binomial probability calculatorPoisson probability calculatorNormal interval probability+6 more
91
Survey researcher
Plan a simple sample and explore proportions and category counts.
Survey sample size estimateWilson proportion intervalContingency table chi-square test+5 more
92
Quality & measurement analyst
Inspect spread, compare measurements and check prediction errors.
Histogram frequency tableMedian absolute deviationInterquartile outlier finder+5 more
93
Data cleaner
Inspect columns, standardise cells and remove duplicate records locally.
CSV column profileRemove duplicate CSV rowsFill empty CSV cells+5 more
94
Reporting analyst
Join exports, reshape tables and prepare grouped summaries for a report.
Join two CSV tablesCombine CSV tablesCSV grouped summary+6 more
95
Outdoor trip planner
Translate coordinates and explore distance, height and walking-time assumptions.
Latitude & longitude formatGreat-circle distance & bearingCoordinate route distance+5 more
96
Weather learner
Explore moisture, wind vectors and temperature-based air models.
Humidity & dew pointVapour pressure deficitWind direction & components+5 more
97
Camera & lighting planner
Compare exposure settings, focus models and ideal lighting relationships.
Exposure value calculatorEquivalent shutter exposureND filter exposure calculator+5 more
98
EV driver
Compare charging assumptions, energy units and ownership costs.
EV charging time & costVehicle ownership costPower converter+4 more
99
Cyclist
Explore gearing, rollout, route geometry and planned interval timing.
Cycling gearing calculatorCoordinate route distanceLatitude & longitude format+5 more
100
Tournament organiser
Arrange rounds, lay out byes and calculate a supplied league scoring model.
Round-robin tournament scheduleSeeded knockout bracketLeague table calculator+5 more
101
Team coordinator
Find shared time, estimate capacity and compare meeting and coverage costs.
Meeting availability overlapMeeting cost calculatorStaff coverage lower bound+5 more
102
Group trip organiser
Plan shared costs, compare currencies and keep dates and times together.
Shared expense settlementBill splitterCurrency converter+5 more
A starting point, rather than a job description. Apply any collection, add your own favourites and switch whenever your day changes.
01
Find your fit.
Choose a role or an activity. You can wear more than one hat.
02
Make it yours.
Apply a collection, then use the hearts to add or remove tools.
03
Pick up where you left off.
Your toolbox becomes your start page in this browser. Switch any time.