ChemReference Periodic Table of Elements
A free, interactive periodic table built for fast lookups and data visualization.
All Chemical Data In One Place
Comprehensive element data, interactive visualizations, and powerful search.
Element Properties
Atomic mass, density, melting & boiling points, electronegativity, ionization energies and dozens more — with unit conversion and copy-to-clipboard.
Electron Configurations
Interactive orbital filling diagrams, shell visualizations, and electron configurations.
Isotope Data
Mass numbers, natural abundances, half-lives, and decay modes.
Data Visualization
Scatter plots, property sorting, category clustering — plot any two properties against each other and discover trends.
What Is ChemReference?
A free periodic table web app for students, educators, and researchers. Look up 70+ element properties with unit conversion, explore interactive electron configurations and 3D orbitals, browse 3,000+ isotopes with half-lives and decay modes, and plot any property against another to discover periodic trends. Install it on any device and use it offline.
Why ChemReference Is The Best Periodic Table Out There
Not just another periodic table — a modern app for finding data fast.
Blazing Fast
Loads in under a second and responds instantly - no third-party scripts.
Works Offline, Everywhere
Install ChemReference as an app on your phone, tablet, or computer and use it fully offline.
Your Privacy, Respected
No cookies, no fingerprinting, no tracking you across the web. Anonymous page view counts are the only analytics collected. No sign-up or account ever required.
Open Data You Can Use
ChemRef's data is the community's data - export any combination of 70+ properties for all 118 elements as CSV or JSON. All exported data is licensed CC BY-SA 4.0 - use it in your research, projects, or teaching.
Infinitely Customizable Printable Periodic Tables
Generate high-quality periodic table printouts at any size — A4, letter, poster, or fully custom dimensions. Choose exactly which properties, labels, and colors to show and download your custom periodic table as SVG or PDF.
The Most Powerful Visualization System
Plot any property against any other in a scatter plot. Color-code the table by any property. Sort, filter, and cluster elements however you want.
Open to Your Corrections
Found an inaccuracy? Submit feedback and corrections anonymously without ever leaving the app and help make ChemReference better. (And actually get to contact a real human! In 2026? Crazy.)
No Ads, No Paywalls
Not "free with a catch" — genuinely free. No banners, no premium tier, no data harvesting. Built by a some who's doing this for fun, not a paycheck.
All The Data You Could Ask For
See every property or just a few - easily configurable and at your fingertips via search in any unit.
Popular Elements
Jump straight to the elements people look up the most. Are they actually popular? Are they just elements randomly generated to look pretty on the page? Who knows.
Easy on the Eyes
Pick a theme that suits you. Changes apply instantly across the entire app. Or be like 99% of users and never change this, making me question why I built this feature in the first place. But hey, they have cute drink-themed names, so at least they're a fun vibe.
Works Everywhere, Even Offline
ChemReference is a progressive web app. Install it on any device, use it without an internet connection, and access it directly from your desktop or home screen instead of a browser.
Ready to Explore?
Check out the periodic table and start playing around. Free, fast, and built for discovery (I highly recommend playing with the Plot feature!).
More Tools
Not merely a periodic table — ChemReference has more tools to help you learn and work.