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Browse the tool catalog | Page 91

Search and filter the online tool directory by task, format, and category, then open detailed pages with clear inputs, examples, and execution context. Page 91.

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Images, Audio & Video655

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

Math, Date & Finance644

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

Design & Color296

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

Text & Writing209

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

Developer & Web193

Developer utilities, networking, web debugging, and automation helpers

Conversion & Encoding175

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

UI Screenshot Structure Review and Development Handoff

Piano Sketch Creation, MIDI Review and Listening Demo Handoff

Retro Game Texture Review and Asset Handoff

Screenshot-Based Procedure Guide Review and Handoff

Responsive Page Change Review and Evidence Handoff

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Converter

RDB SSTable LevelDB RocksDB Memcached Binary KV-Store Encoding Lineage

Decode binary key-value store artifacts byte by byte: Redis RDB snapshots, LevelDB/RocksDB WAL records and SSTable footers, Memcached binary packets, BoltDB and LMDB page headers — with keyspace hex-diff and TTL expiry matrix.

Science & Education

Mosquito-borne Disease Basic Reproduction Number R0 Tutor

Ross–Macdonald R0 = m·a²·b·c·pⁿ/(−r·ln p) for malaria, dengue, Zika or chikungunya: herd-immunity threshold, vectorial capacity, critical mosquito density, parameter elasticities, control targets and a seasonal transmission-window curve.

Development

OpenTelemetry W3C traceparent / tracestate / baggage + OTLP Header Propagation Validator

Validate W3C Trace Context propagation headers end to end: traceparent (version / 16-byte trace-id / 8-byte parent-id / trace-flags), tracestate (≤32 list members, tenant keys), baggage (percent-encoded values + opaque properties), OTLP export Content-Type, the gRPC grpc-trace-context-bin 25-byte binary context — plus a two-header correlation round-trip with a random child span-id collision check.

Geography

OpenStreetMap Nominatim / GeoJSON Static SVG Map Renderer with Styled POI Icons and Route Overlay

Render a GeoJSON FeatureCollection as a self-contained, tile-free static SVG map: OSM Carto-style water/greens/buildings and class-coloured roads, amenity/shop/tourism-classified POI pin icons with halo labels, highlighted route LineStrings with geodesic bearing arrows, scale bar, lat/lon graticule and the embedded OpenStreetMap attribution (ODbL). Optional Nominatim geocoding (max 5 queries, policy-compliant pacing and User-Agent) adds place markers.

Document Tools

PDF Formula Extractor (LaTeX / MathML / MathJax) with AMS Equation-Number Preservation

Detect and reconstruct embedded math formulas from vector PDFs: math-font recognition (CMMI/CMSY/CMEX, STIX, Cambria Math), Unicode math, super/subscripts and stacked fractions, AMS equation numbers ((2a)/(2b) subequations) preserved; outputs copyable LaTeX, presentation MathML (MathJax/KaTeX-compatible) and a downloadable .tex bundle.

Development

pytest conftest Fixture Dependency Graph & mock.patch Leak Detector

Statically analyze a pytest conftest.py chain: render the fixture dependency graph across all five scopes (function/class/module/package/session), detect deeper-conftest overrides, ScopeMismatch edges, and cross-test state pollution — mock.patch().start() without .stop(), monkeypatch leaking from broad-scope fixtures, and with mock.patch held open across yield.

Design

QR Code Art, Styled Module and Logo Embed Generator

Generate art QR codes with brand colors, gradients, rounded or dot modules and a centered logo, plus the ISO mask-penalty breakdown, per-module metadata export and a Reed–Solomon erasure-budget verdict.

Development

Python Regex Tester (re module)

Test Python re patterns online: (?P<name>…) named groups, (?P=name) backreferences, VERBOSE patterns, findall behavior, and \g<name> replace templates — plus ready-to-paste Python code.

Science & Education

Raoult's Law Calculator

p_i = x_i·p_i* for ideal solutions, with total pressure and vapour-phase composition for binary mixtures.

Science & Education

Reaction Order Determiner

Initial-rate method: single-reactant log-log fit or two-reactant method of pairs, with k back-calculated per experiment.

Science & Education

Reaction Rate Constant Estimator

k(T) from a reference point and Ea via the Arrhenius ratio, with kJ/kcal/J activation energy conversion built in.

Science & Education

Poynting Vector Calculator

Energy-flow density S = E × H = (1/μ₀) E × B with unit selectors, H = B/μ₀, both energy densities, and the plane-wave check where S = c·u.