Tools
Browser-based utilities for research, chemistry, productivity, and fun. No install needed.
AI & Research
Featured
LLM Studio
Chat with GLM-5 (pre-configured, free!), GPT-4o, Claude, Gemini, Groq and OpenRouter, all in one place with full conversation history.
Research Paper Finder
Search and discover research papers via Semantic Scholar and arXiv APIs. Filter by field, year, and citation count.
Featured
Mermaid Diagram Editor
Full-featured diagram editor with live preview, VS Code-style editing, syntax highlighting, and multi-format SVG/PNG export.
PDF & Media
Featured
PDF Studio
Compress, convert to images, merge multiple PDFs, and split by
page range, all in one unified interface that runs entirely in
your browser.
Audio Studio
Browser-based audio recording, editing, and processing with
effects, filters, and a guitar tuner.
Image Studio
Compress and convert images (JPG, PNG, WebP). Quality control,
resize, batch processing. All local.
Webcam Tester + Air Guitar
Camera diagnostics with live resolution/FPS stats and snapshots, plus an air guitar you strum through the webcam
(MediaPipe hand tracking).
YouTube Downloader
Download YouTube videos and audio in multiple formats (MP4, MP3,
WEBM, WAV, FLAC) and qualities up to 4K. Supports playlists and
batch downloads.
Chemistry
Molecule Visualizer
Interactive 3D visualization of chemical molecules from PDB and
SDF files using WebGL.
Interactive Periodic Table
Explore elements with detailed properties, electron
configurations, isotopes, and spectral data.
Equation Balancer
Balance chemical equations automatically with step-by-step
matrix algebra explanations and stoichiometry.
pH Calculator
Calculate pH, pOH, and concentrations for strong/weak acids and
bases, including buffer solutions.
Molecular Weight Calc
Calculate molecular weight from chemical formulas with
per-element breakdown and molar mass reference.
Games & Misc
Chemistry Games
Fun chemistry-themed browser games, element quizzes, and
reaction simulators to learn while playing.
Public APIs
Browse 800+ free public APIs that need no key: weather, space,
books, science and more, across 48 categories.
Fullscreen Timer
Presenter timer with negative overtime counting, a time-up
buzzer, and Talk → Q&A segment sequences that run one
after another.
Unit Converter
Convert between scientific units: length, mass, temperature,
energy, pressure, and more with high precision.