Elysia Tools: Tools, Visualizations, and Samples in One Place

Markdown to Slack mrkdwn

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

Conversion & Encoding

BIP39 Mnemonic Phrase Generator

Generate or validate 12 to 24 word BIP39 mnemonic phrases with entropy and PBKDF2-HMAC-SHA512 seed output

Security & Validation

PDF/A Convert

Convert PDF documents to a self-declared PDF/A archival profile with zero external dependencies

Documents & PDF

PDF/A Validate

Pre-validate PDF documents for PDF/A archival compliance

Documents & PDF

PDF Accessibility Check

Audit PDF documents for accessibility features like tagging, language and PDF/UA metadata

Documents & PDF

PDF Diff

Compare two PDF documents page by page and highlight text differences

Documents & PDF

PDF Word Count

Count words, characters, sentences and CJK characters in PDF documents

Documents & PDF

Resume Job Description Matcher

Compare resume text against a job description, normalize keyword variants, and highlight coverage gaps

Text & Writing

Kelvin-Helmholtz Instability — Two-Phase Shear Flow

Two fluid layers sliding past each other destabilize at their interface into the characteristic KH billows. Tune density ratio, shear, surface tension, and toggle magnetic (MHD) stabilization.

Cherenkov Radiation & Mach Cone

When a charged particle exceeds the phase speed of light c/n in a medium, it emits a coherent blue shock-cone. Slide the speed and index to see the cone form, vanish below threshold, and match the acoustic Mach cone.

Fresnel Diffraction Zones — Half-Period Bands & the Poisson Spot

Near-field diffraction from half-period zone decomposition. Toggle between circular aperture and opaque disk — watch the Poisson bright spot appear at the center behind an obstruction.

Ferrofluid Rosensweig Instability — Hexagonal Spike Formation

Apply a vertical magnetic field and watch hexagonal spikes spontaneously emerge above the critical field Bc. A competition between magnetic energy and surface tension/gravity.

Casimir Effect — Quantum Vacuum Force

Two neutral conducting plates in vacuum attract each other due to restricted quantum vacuum fluctuations. Adjust separation, geometry, and material to explore the force.

Waddington's Epigenetic Landscape — Cell Fate Decision

Conceptual Waddington landscape: cells drift from a pluripotent summit into lineage-biased valleys in a potential-like field inspired by gene regulation and epigenetic stabilization.

Arnold's Cat Map — Chaotic Area-Preserving Map

Interactive Arnold Cat Map visualization: (x', y') = ((x+y) mod N, (x+2y) mod N). Iterations scramble the image, but after exactly K steps it restores perfectly — chaos with hidden order.

Black Hole Accretion Disk

Interactive relativistic black hole accretion disk visualization with Doppler beaming, gravitational redshift, and thin-disk temperature profile T(r) ∝ r⁻³ᐟ⁴

Camera RAW Photo File Samples

Downloadable sample files covering Sony ARW/SRF/SR2, Canon CR2/CR3/CRW, Adobe DNG, Nikon NEF/NRW, Fuji RAF, Olympus ORF, Panasonic RW2, Leica RAW/DNG, and a generic RAW binary file for testing camera RAW upload workflows.

15 samples

Copyright-Free Raw PCM Audio Samples

Raw PCM s16le audio samples featuring nature ambience and relaxing music for waveform, playback, and conversion workflows

3 samples

Copyright-Free DTS Audio Samples

DTS encoded audio samples featuring nature ambience and relaxing music for playback, conversion, and listening workflows

3 samples

AMR Narrowband Audio Sample

AMR-NB voice audio sample for telephony playback, upload, and format conversion workflows

1 samples

GSM Audio Sample

GSM encoded audio sample for telephony playback, upload, and format conversion workflows

1 samples

Length Unit Samples

Practical length unit references you can copy when you want to compare common units directly with meters (m)

4 samples

Time Zone Workflow Scheduler ICS Samples

ICS files generated in the same structure returned by the Time Zone Workflow Scheduler, with multiple VEVENT meeting candidates exported from overlap windows

3 samples

Terraform Plan JSON Samples

Sample Terraform plan JSON files exported from terraform show -json style payloads for dependency visualization and change review

3 samples