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Browse the tool catalog | Page 244

Search and filter the online tool directory by task, format, and category, then open detailed pages with clear inputs, examples, and execution context. Page 244.

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Math, Date & Finance639

Calculators, numerics, date logic, statistics, and finance tools

Images, Audio & Video600

Image, audio, and video processing, conversion, and optimization tools

Design & Color294

Color, layout, graphics, visual styling, and design helper tools

Text & Writing206

Writing, cleanup, formatting, extraction, and text analysis tools

Developer & Web189

Developer utilities, networking, web debugging, and automation helpers

Conversion & Encoding172

Format, file, archive, unit, and encoding conversion tools

Excel Formula Engineering

Absorbance Quantification and Acid-Base Calculations

JSON Structure Surgery

Tabular Data Cleanup, Shaping, and Normalization

Professional Assembly of an Excel Workbook

Docs Pricing About Terms of Service Privacy Policy Contact

Development

Meta Tag Extractor

Extract and analyze meta tags, Open Graph, Twitter Cards, and structured data from web pages

Utilities

MIME Type Detector

Detect MIME type from file extension or filename

Games

Maze Generator

Generate random mazes with customizable size and difficulty

Data Processing

Missing Value Handler

Comprehensive missing value detection, analysis, and intelligent handling with multiple strategies

Format Conversion

Logfmt to JSON Structured Log Bridge

Convert logfmt (key=value) to JSON or JSON back to logfmt, with quote escaping, number/boolean coercion, and duplicate-key handling.

Education

LOD Score Calculator (linkage analysis)

Two-point linkage LOD scores from recombinant/non-recombinant meioses: θ̂ = r/N, Zmax, LOD at fixed θ, LOD curve table, Morton thresholds (Z≥3 linkage, Z≤−2 excluded). Derived from Morton 1955, Ott 1999, Griffiths, StatPearls. Educational use only.

Health

Loading Dose Calculator (LD = Css · Vd / F)

Calculate the loading dose required to rapidly reach a target plasma concentration: LD = Css · Vd / F, where Css is the target concentration, Vd is the volume of distribution, and F is bioavailability (1 for IV, <1 for oral). A loading dose achieves Css essentially immediately (one-compartment IV bolus) instead of waiting 4–5 half-lives for accumulation. For oral loading, divide by F. Maintenance dosing (MD = Css·CL·τ/F) must follow to sustain the concentration. Loading doses are hazardous for narrow-therapeutic-index drugs (digoxin, theophylline, antiarrhythmics) — clinical judgement required. Optional body-weight input converts the result to mg/kg. Not medical advice.

Development

Lodash Online Utility

Run a safe, curated set of Lodash helpers on JSON input.

Math & Numbers

Luminous Intensity Converter (cd / mcd / candlepower)

Convert luminous intensity between candela (cd, SI base, = 1/683 W/sr at 540 THz), millicandela (1 = 0.001 cd), and candlepower (1 = 0.981 cd, obsolete standard candle). Converts via candela to the target unit and lists the equivalent value in all three units for reference. Reference values: indicator LED ≈ 5–20 mcd, flashlight ≈ 100–1000 cd, car headlight high beam ≈ 75000 cd.

Development

Markdown Link Checker

Statically check Markdown links for format errors, broken anchors, and undefined references (no network requests)

Text Processing

Markdown Lint and Style Checker

Lint Markdown against ~15 markdownlint rules plus 2 Chinese-typography rules, with line-located reports and one-click auto-fix of safe issues

Development

Markdown Linter

Check Markdown for style issues: heading levels, code fences, list consistency, and more (zero-dependency rule engine)