Tools
ASCII Art
Turn text into ASCII character art
Codec
Base64, URL, case, radix and Morse codecs
Color Tool
Color picker, palettes, gradients and contrast checker
Time Tool
Countdowns, time zones, timestamps and date calculations
Image Tool
Compare, stitch, watermark, Base64, plus GIF making and a pixel-art editor.
Random Image
Random anime-ish pictures and sized placeholder images
Format Converter
Convert between JSON, CSV, XML, YAML and Markdown
Pomodoro Timer
Focus on work, rest efficiently
QR Code Generator
QR code and Code128 barcode generator
Text Tool
Deduplicate, diff, reverse and word frequency
Plot Tool
Function plots, waveforms, spectra and Fourier series
Periodic Table
Browse all 118 chemical elements; click any element to view its details.
Unit Converter
Convert between length, weight and temperature units
2D Simulation
Pendulum, Lorenz system, gravity sandbox and random walks
Music Tool
Music box, metronome, synthesizer and numbered notation
Chart Toolkit
Bar/pie/line charts, decision matrix, A/B sample size, radar, heatmap, boxplot, candlestick and bubble charts — all rendered with pure SVG.
CSS Toolkit
Convert HTML/JSX, build clip-path, glassmorphism and neumorphism styles.
DevOps Cheat Sheet
Cheat sheets for shell, vim, tmux, systemd, Docker, K8s, nginx, git and more.
Dev Toolkit
JSON formatter, LOC counter, TODO extractor, JSDoc comment generator, complexity estimator and code card, plus key-code, Unicode, URL-params, favicon and OG-image helpers.
Divination Toolkit
Lot drawing, I Ching coin casting, daily tarot draw, Guandi lots, coin-flip decisions, dream dictionary and a fun fortune teller.
Learn Toolkit
Flashcards, kana chart, stroke counts, idiom chain, poem fill-in and brain teasers.
Life Toolkit
Love match, horoscope, coin decision, habit/water/ledger/todo trackers, vCard/iCal, username/avatar/placeholder generators and more.
Misc Toolkit
Charset/encoding viewer, HTML entity, JS sandbox, CSS unit converter, selector tester, markdown table, TOC, JSON query and viewport inspector.
Science Toolkit
Karnaugh map simplifier, physics constants, resistor color codes, binary logic, base conversion, plus truth tables and a logic-gate sandbox.
Security Reference
Quick reference for XSS/SQLi payloads, HTTP status, OWASP, CORS, DNS, ports and more.
Psych Test Toolkit
MBTI, Big Five, Holland RIASEC, EQ, GAD-7 anxiety, PHQ-9 depression, stress, DISC, left/right brain and Enneagram self-assessments, plus a light type quiz.
Eco Toolkit
Household CO2 estimate, recycling bin lookup, water usage and tree-offset calculator.
Food Toolkit
Harris-Benedict daily calories, macro split, recipe scaler and cooking unit converter.
Geo Toolkit
Great-circle distance, DMS conversion, bearing and timezone-offset helpers — all pure math.
History Toolkit
Build timelines, look up Chinese dynasties by year, convert to sexagenary (Ganzhi) cycles and compute age.
Language Toolkit
Palindrome & anagram detection, Caesar cipher, Morse code conversion and word counting.
Life Event Toolkit
Live countdowns, exact age, life-stage timeline and Chinese zodiac & horoscope lookup.
Meditation Toolkit
Breathing pacer, meditation timer and gratitude journal — a calm space to relax.
Pet Toolkit
Dog/cat age conversion, daily feeding estimate and random pet name generator.
Astronomy Toolkit
Sun/moon positions, moon phase, eclipses, planets, meteor showers, aurora probability, plus a procedural star map.
Biology Toolkit
DNA transcription/translation, codon table, organelle/anatomy atlas, blood-type genetics, pedigree, half-life.
Chemistry Toolkit
pH, buffer, molarity dilution, redox balancing and Lewis structures.
FX Toolkit
Canvas particle/filter effects and Web Audio sound effects, plus an 8-bit synth and Perlin 3D terrain.
Simulation Toolkit
Lightweight simulations: city, UN, election, startup, life, lottery, auction, games.
Writer Toolkit
Name generator, worldbuilding/character cards, outline, word count, writing sprint and writing exercises.
API Toolkit
JSON path, schema, REST client, WebSocket debug and JWT tools.
Git DevKit
Git command generator, Docker run, commit message and env parser.
Text DevKit
Regex tester, SQL formatter, linter, dir diff, semver and IP tools.
Math Lab
Scientific calc, stat tests, permutations, Monte Carlo, Markov tools, plus bitwise ops, IEEE 754 and radix conversion.
Generators
UUID, NanoID/Snowflake IDs, secure passwords and MD5/SHA-256 hashes in one page.
Algorithm Visualizer
Visual demos of sorting, searching trees, dynamic programming and graph algorithms — BST, DP, graphs and shortest paths in one place.
Health Toolkit
BMI, calories, fitness calculators, ovulation tracking and BAC estimation — everyday health numbers in one toolkit.
Crypto & Blockchain
Interactive demos of classic ciphers and how blockchain blocks, hashing and consensus work.