Browse the tool catalog | Page 250 | Elysia Tools

Elysia Tools

Browse tools, examples, visual explainers, and topic guides from one clear workspace.

Top Categories

Hubs

Language

ZH ES PT RU FR DE EN

Elysia Tools

Navigation

Tools

Browse the tool catalog | Page 250

Search and filter the online tool directory by task, format, and category, then open detailed pages with clear inputs, examples, and execution context. Page 250.

Previous 247 248 249 250 251 252 253 Next

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

Generator

Live Countdown Banner Generator

Generate a self-contained, dependency-free HTML countdown banner for any page. Target date, timezone, theme, one-shot or weekly-recurring mode, live in-browser rendering.

Text Processing

Leetspeak Decoder & Detector

Decode leetspeak (1337) to plain text and score how plausibly leet an input is — for password-policy bypass screening, profanity-filter evasion, and log-noise filtering.

Astronomy

Light-Year and Astronomical Unit Converter

Convert between light-years (ly), parsecs (pc), astronomical units (AU), kilometers and meters using IAU-defined constants, with a parallax-angle → distance helper.

Math & Numbers

Kinetic Energy Calculator (KE = ½mv²)

Compute kinetic energy, mass, or velocity from the other two, with momentum and km/h conversion

Math & Numbers

LED Series Resistor Calculator

Compute the current-limiting resistor for LEDs in series with power, nearest standard value and wattage rating

Text Processing

Leet Speak Converter

Convert text to and from leet speak (1337). Encode with Basic, Full, or Caps styles, or decode leet back to plain text.

Text Processing

Line Ending Converter

Convert text line endings between LF (Unix/macOS), CRLF (Windows), and CR (classic Mac). Normalizes mixed endings in one pass and reports the original breakdown.

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

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