Engineering Calculators
-- toolsSimple Unit Converter
Convert between metric, imperial, and engineering units with precision.
Ohm's Law Calculator
Calculate voltage, current, resistance, and power relationships.
Linear Thermal Expansion
Calculate material expansion and contraction due to temperature changes.
ESP32 Pinouts
Reference diagrams for ESP32 development board pin configurations.
Raspberry Pi Pinouts
GPIO reference diagrams for Raspberry Pi board configurations.
Sensors Reference
Common sensors for temperature, pressure, flow, proximity, and more.
Psychrometric Calculator
Calculate moist air properties (Tdb, Twb, Tdp, RH, humidity ratio, enthalpy, specific volume) using ASHRAE equations with interactive psychrometric chart.
IT & Coding Tools
-- toolsColor Picker & Converter
Pick colors and convert between HEX, RGB, HSL, and other formats.
Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal.
JSON Formatter
Format, validate, and minify JSON data with syntax highlighting.
Regex Tester
Test and debug regular expressions with live matching and explanation.
AI Image Detector - FFT Noise Freq Analysis
Analyze images for AI-generation.
Face Blur
Privacy-focused face blurring using MediaPipe. Oval-shaped face regions from 468 landmarks, 7 blur modes, manual draw mode, and undo/redo support.
Markdown Preview
Write and preview Markdown with Markdown, CommonMark, and Github modes. Export to HTML, download files, and manage local images.
PDF Diff Checker
Compare two PDFs with semantic text diffing and in-place highlighting. Detect insertions, deletions, and modifications with synchronized side-by-side view.
Database Tools
-- toolsDuckDB Playground
A browser-based SQL playground powered by DuckDB-WASM. Execute SQL queries against imported data files entirely client-side with no server dependencies.
SQLite Viewer
Browser-based SQLite database viewer using sql.js WASM. Browse tables, view schemas, execute queries, and export results—all client-side with no server uploads.
General Utilities
-- toolsTimestamp Converter
Convert between Unix timestamps, ISO dates, and human-readable formats.
Crypto Lab
Encrypt and decrypt via AES/DES, or generate MD5/SHA hashes.
Word Count
Count words, characters, sentences, and paragraphs in your text.
Case Conversion
Convert text between uppercase, lowercase, title case, and more.
Encoding / Decoding
Encode and decode Base64, URL, HTML entities, and other formats.
Productivity Timer
Focus timer for deep work sessions with automatic breaks, completion tracking, and adjustable alarm + notifications.
Screenshot Tool
Capture a screen frame (or upload/paste), crop precisely with pan/zoom + optional aspect lock, then export PNG/JPEG/WebP or copy to clipboard(all local).
Biochemical Engineering Utilities
-- toolsHED Calculator
Translate preclinical animal doses to Human Equivalent Doses (HED) via BSA normalization.
Toxicology Body Burden
Estimate total systemic load from plasma concentration using volume of distribution models with optional kinetic back-calculation.
Oral Multi-Dose Simulator
Simulate oral dosing regimens (single or repeated) with first-order absorption and elimination to visualize concentration-time profiles and key PK metrics.
Data Science
-- toolsDBSCAN Visualizer
Interactive density-based clustering with Rust/WASM performance. Features 2D/3D visualization, step-through animation, k-distance plots, and validation against scikit-learn.
Linear Regression
Simple and multiple OLS regression with multicollinearity detection (VIF). Upload CSV/Excel data, paste from clipboard, or use built-in examples. Output includes coefficients, R², F-stat, p-values, 95% CI, residuals table, and interactive charts (scatter, Q-Q plot, residuals).