Toolbox

AI Tools Directory35+ top AI tools — ChatGPT, Claude, Gemini, Midjourney & more aichatgpt Open

Excel WorkbenchFull Excel toolkit: import, analyze, chart, formulas & AI excelxlsx Open

Coordinate ConverterDMS ↔ DD, UTM, MGRS conversions coordinatesprojection Open Area & Distancem², ha, km, mi, ft, bigha + 12 units measurementconversion Open Map Scale CalculatorMap cm → real-world km/mi cartography Open Haversine DistanceGreat-circle distance between coordinates geodesynavigation Open UTM ConverterLat/Lng → UTM zone & coordinates projection Open Projection ReferenceEPSG codes & coordinate systems guide epsgcrs Open Resolution CalculatorPixel ↔ ground distance & area rasterimagery Open Slope & AspectRise/run → slope %, degree, grade terraindem Open GIS Data Finder14+ free geospatial data sources opendata Open GeoData ConverterCSV, Excel, GeoJSON, KML, SHP, GPX, WKT formatexport Open BD District ExplorerAll 64 districts — demographics, history, geography bangladeshdistricts Open

Spectral Index CalculatorNDVI, NDWI, SAVI, EVI, NDBI + 5 more vegetationwater Open Band Combinations10+ satellite band combo reference sentinellandsat Open Satellite Sensor ReferenceSentinel, Landsat, MODIS, VIIRS specs satellite Open GEE Code SnippetsGoogle Earth Engine ready-to-use code javascriptcloud Open

Scientific Calculatorsin, cos, sqrt, log, expressions + history arithmeticfunctions Open Quadratic Solverax² + bx + c = 0 with discriminant & vertex equationalgebra Open Matrix CalculatorAdd, multiply, determinant, inverse, transpose linear algebra Open Trigonometry Calculatorsin, cos, tan, csc, sec, cot + conversions anglesgeometry Open Linear System Solver2×2 system of equations (Cramer's rule) equationalgebra Open Number SequencesFibonacci, primes, factorial, arithmetic, geometric seriespatterns Open

Physics LabKinematics, force, energy, waves, electricity mechanicselectrics Open Universal Unit ConverterLength, mass, speed, pressure, data, angle conversionmeasurement Open

AI Data Analysis LabUpload dataset — AI insights, ML, charts, dashboard mlai Open Statistics CalculatorMean, median, std dev, quartiles, variance descriptive Open Correlation CalculatorPearson r & R² for two variables relationship Open Sample Size CalculatorSurvey & research sample calculator surveyresearch Open Linear RegressionSlope, intercept, R², equation + SE mlprediction Open Probability DistributionsNormal, Binomial, Poisson PDF/CDF probability Open Hypothesis TestingZ-test, t-test, Chi-squared with p-values inference Open Data NormalizerMin-Max, Z-Score, Log, Robust scaling preprocessingml Open Error MetricsMAE, MSE, RMSE, MAPE, R² for predictions accuracyml Open Interpolation CalculatorLinear & bilinear interpolation spatialestimation Open Stata File Converter.DTA .DO .DCT .MAP → CSV with table, charts & map statadta Open

Citation GeneratorAPA, MLA, Chicago, Harvard, IEEE, BibTeX + DOI bibliography Open DOI LookupFull metadata from CrossRef by DOI papermetadata Open Readability AnalyzerFlesch, Gunning Fog, Coleman-Liau scores writingtext Open Word FrequencyTop keywords with visual frequency bars nlptext Open h-index Calculatorh-index, g-index, i10-index from citations scientometrics Open Journal Finder250+ journals with impact factors, h-index, CiteScore & advanced filters publishingimpact factor Open Document AnalyzerAI deep analysis — PDF, DOCX, TXT with 8 summary modes & export aipdf Open Research Tools Directory14 academic search engines — Google Scholar, PubMed, CORE & more searchdatabase Open

Color ConverterHEX ↔ RGB, HSL, CMYK, HSB + visual colorweb Open Palette Generator5 harmony modes — analogous, triadic, split colorui Open CSS Gradient BuilderLinear, radial & conic gradients cssweb Open Contrast CheckerWCAG AA/AAA accessibility tester a11ywcag Open Typography PreviewPreview text across fonts & sizes fontui Open Font PairingCurated heading + body font combos typographypairing Open Shape GeneratorCircle, star, heart, hexagon SVG builder svgvector Open Icon Library20+ SVG icons with category search iconssvg Open Color BlenderBlend 2 colors with step gradient colorgradient Open Color HarmoniesComplementary, triadic, tetradic, mono colortheory Open Image Color ExtractorExtract palette from any image colorimage Open Box Shadow GeneratorMulti-layer CSS shadow builder cssshadow Open Border Radius BuilderCorner radius CSS generator csscorners Open Glassmorphism BuilderFrosted glass CSS effect generator cssglass Open Aspect Ratio CalculatorResolution, megapixels, PPI analysis imagevideo Open DPI & Print CalculatorPrint size, web size, A4 fit check printimage Open Font Size ScaleModular scale generator for typography typographycss Open

JSON FormatterFormat, validate & minify JSON formatapi Open Regex TesterTest patterns with live matches patternstring Open Base64 EncoderEncode & decode Base64 strings encoding Open Number Base ConverterDec ↔ Bin ↔ Oct ↔ Hex binaryhex Open URL EncoderEncode & decode URL components weburl Open Hash GeneratorSHA-1, SHA-256, SHA-384, SHA-512 securitycrypto Open CSS Unit Converterpx ↔ rem ↔ em ↔ pt cssweb Open

Focus Timer25/5 Pomodoro timer with ring focustime Open Password GeneratorSecure random passwords with strength security Open Word & Char CounterWords, chars, sentences, read time writingtext Open Temperature Converter°C ↔ °F ↔ K conversion Open Percentage CalculatorWhat is X% of Y? + reverse math Open Timezone ConverterBST, IST, EST, UTC + 7 more zones timeglobal Open Date DifferenceDays, weeks, months between dates datetime Open Lorem Ipsum GeneratorPlaceholder text generator textdummy Open