All tools — Page 15
983 useful tools. Browse a category or search the full toolkit.
CSS Flexbox Playground
Build and preview flex direction, wrapping, item sizing, alignment and gaps, then export the generated CSS.
DeveloperCSS Grid Layout Builder
Generate fixed columns or auto-fitting CSS card grids with native layout, spacing and row-size previews.
DeveloperCSS 2D Transform Lab
Preview ordered translation, rotation, scaling and skew with origin controls and an equivalent affine matrix.
DeveloperCubic Bezier Easing Lab
Plot CSS cubic-bezier timing curves and inspect eased progress without automatically playing an animation.
DeveloperResponsive Media Query Builder
Build width, orientation, pointer and preference queries and observe whether the native browser matches them.
EducationOriginal Word-grid Bingo Cards
Create distinct custom word grids and a caller checklist from your own term list, with an optional free center.
EducationTwo-sided Study Card Sheets
Lay out original front/back study cards with explicit reflected back coordinates and a calibration-ready placement manifest.
EducationOriginal Sequence Strip Activity
Shuffle your ordered statements into cut-out strips and optionally export the exact teacher ordering on a separate page.
EducationOriginal Category Sorting Activity
Create original term cards and category labels with a shuffled student layout and optional separate teacher classification.
DataCSV Calendar Range Expander
Expand declared date-only source records into calendar-day rows with original columns and explicit source-record provenance.
DataLogical CSV Content Receipt
Create or verify unsigned table and positional-record SHA-256 receipts while ignoring CSV quoting and newline syntax.
DataLocal GeoJSON Point Dataset
Select Point/MultiPoint features by an explicit WGS84 box and export a property-projected local GeoJSON copy.
AccessibilityColor Token Contrast Matrix
Export every named foreground/background token pair with full-value contrast ratios and explicit 3, 4.5 and 7 thresholds.
SEODeclared Canonical Mapping Review
Trace a supplied canonical-hint graph and expose missing inventory targets, chains, cycles and declared indexability questions offline.
TextFacilitator Agenda Sheet
Create an exact minute-by-minute participant agenda with day offsets, an overrun policy and independently omitted private notes.
DataTabular Fixture Dataset Builder
Export deterministic related CSV tables and an exact-string JSON bundle from bounded original recipes.
DeveloperIndependent JSON Negative Fixture Bundle
Create a ZIP of separate controlled mutations with JSON Pointer targets and a hashed unchanged baseline.
FilesGuarded File Byte Patch
Check expected original bytes and optional SHA-256 before downloading a separate equal-length patched copy.
TextCSL Citation Metadata Review
Review a clearly limited CSL JSON metadata profile and list unassessed fields without inventing bibliographic facts.
FilesDOCX Revision Source Inventory
List selected WordprocessingML revision elements, literal author/date attributes and bounded excerpts from local DOCX parts.
TextToken Span Label Workbench
Convert supplied Unicode-scalar entity spans and token boundaries to strict IOB2/BILUO labels or back.
TextParallel Text Alignment Builder
Export explicit monotonic segment groupings with stable IDs, original paired text and visible unlinked segments.
EducationInterlinear Gloss Alignment Workbench
Review word and morpheme-separator alignment and export safe original interlinear teaching examples when the declared checks pass.
EducationProtein Cleavage Rule Workbench
Enumerate bounded peptides from explicit residue-boundary rules, length filters and missed declared cuts.
EducationGlobal Pairwise Sequence Alignment
Export one deterministic end-to-end sequence alignment, exact integer score and explicit gap-operation witness.
CalculatorsThree-way Purchase Matching Workbench
Review ordered, received and invoiced quantities with explicit price tolerances and traceable individual exceptions.
CalculatorsSingle-period Stock Scenario Workbench
Inspect an optimal one-period order quantity under your discrete demand probabilities and salvage assumptions.
CalculatorsDynamic Lot-sizing Workbench
Choose a least-cost finite ordering schedule from known period demand, setup costs and stock-holding costs.
CalculatorsWeighted Job Sequencing Workbench
Order available jobs on one machine to minimize weighted completion time and compare the entered sequence.
CalculatorsWeighted Booking Selection Workbench
Choose a maximum-value set of nonoverlapping bookings on one resource and inspect the accepted intervals.
MathMinimum-cost Coverage Workbench
Choose a least-cost subset of candidates that collectively covers every named requirement, with a coverage witness.
CalculatorsFinite Arrival Queue Workbench
Replay explicit arrivals and service durations through a shared first-come-first-served queue with identical servers.
DataHierarchical Forecast Reconciliation Workbench
Make supplied forecasts add up across a small tree with bottom-up, equal-weight or declared-variance reconciliation.
CalculatorsBasket Price Index Workbench
Build direct and chain-linked price indexes from matched item prices and quantities across your own periods.
CalculatorsPassive DC Node Network Workbench
Solve a small arbitrary resistor topology from fixed DC node voltages and inspect exact KCL and power balances.
DataPaired Method Agreement Workbench
Inspect signed paired-method differences, magnitude coordinates and transparent descriptive spread limits.
Music & audioPCM WAV Waveform Image Generator
Create a local waveform SVG or PNG image using min/max sample envelopes and an explicit channel layout.
Music & audioPCM WAV Spectrogram Image Generator
Plot a bounded local WAV as a time-frequency PNG with explicit FFT windows, channel and amplitude scales.
DataCSV Ordered Window Features
Append source-order lag, lead or fixed trailing numeric frames within exact groups and preserve every original row.
DataCSV Interval Overlap Join
Join every overlapping interval pair within exact keys with exact intersection bounds, lengths and source-record provenance.
DataCSV Adjacency Tree Builder
Export exact ID/parent records into ordered nested trees with original cell arrays, record provenance and explicit cycle refusal.
DataGrouped Dataset Partition Bundle
Create reproducible group-atomic CSV partitions with explicit group weights and a content-hash membership manifest.
DataCSV Functional Dependency Review
Find concrete original-record counterexamples to declared determinant-to-dependent field rules in supplied CSV data.
SEOQuery Landing-page Distribution Review
Review supplied exact query/page click and impression distributions without inventing cannibalization or property-level totals.
SEOPage Metadata Inventory Review
Find repeated supplied titles, descriptions and heading strings across a page inventory with explicit author-defined length budgets.
EducationOriginal Crossword Sheet Builder
Publish your own connected letter/block grid with checked numbering, complete clues and an independently omitted solution page.
EducationRuby Reading Practice Sheets
Export original text with explicit ruby readings or practice blanks and a genuinely omitted optional teacher-reading page.
DeveloperOpenAPI Operation Contract Explorer
Inspect local OpenAPI 3.1 operations, effective parameters, declared security alternatives and selected reference diagnostics.