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Browse the tool catalog | Page 97

Search and filter the online tool directory by task, format, and category, then open detailed pages with clear inputs, examples, and execution context. Page 97.

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Math, Date & Finance586

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

Images, Audio & Video564

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

Design & Color284

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

Text & Writing200

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

Conversion & Encoding167

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

Developer & Web163

Developer utilities, networking, web debugging, and automation helpers

Audio Encoding and Format Conversion Tools

Image Format Conversion and Animated Export Tools

JSON Interchange and Format Translation Tools

Color Space Conversion Tools for Web and Print

Text Case, Encoding, and Normalization Conversion Tools

Docs Pricing Terms of Service Privacy Policy Contact

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)

Format Conversion

Markdown TOC Generator

Generate a table of contents from Markdown headings with GitHub-style anchor links

Development

JSON to Rust Struct Converter

Convert JSON data into Rust structs with serde Serialize/Deserialize derives, snake_case fields, and serde rename attributes

Development

JSON to TypeScript Converter

Convert JSON data into TypeScript interfaces or type aliases with union types, optional fields, and nested object inference

Security

JWK Generator & Parser

Generate JSON Web Keys (JWK) for RSA, EC (P-256/P-384/P-521/secp256k1), and OKP (Ed25519/Ed448/X25519/X448), or parse an existing JWK to inspect its parameters, thumbprint, and metadata

Security

JWT Inspector & Verifier

Decode a JWT (header + payload) with syntax highlighting, diagnose standard claims, and verify the signature with HS*/RS*/PS*/ES*/EdDSA keys — plus a tampered-token forgery demo

Astronomy

Kepler Orbit Solver

Numerically solve Kepler’s equation E − e·sin(E) = M for eccentric anomaly E, true anomaly ν, orbital radius and relative speed, with Newton/bisection/fixed-point methods, convergence history and an SVG orbit diagram

Network

MAC OUI Vendor Lookup

Look up the manufacturer of a MAC address from the IEEE OUI database, or reverse-search a company name to list all its OUI blocks — fully offline

Format Conversion

Markdown to Slack mrkdwn

Convert GitHub-flavored Markdown into Slack-friendly mrkdwn and flag unsupported constructs

Math & Numbers

KM/L to MPG

Convert kilometers per liter to miles per gallon with configurable decimal precision

Math & Numbers

L/100km to MPG

Convert liters per 100 kilometers to miles per gallon with configurable decimal precision