FeaturesLearn more in the Book of Clerk or read our paper

• Bring Your Own Editor

  Clerk lets you keep using your favorite editor and complements the Clojure REPL. The REPL is a peephole. See the full picture with Clerk.

• Just Clojure Namespaces

  Use plain Clojure namespaces that you can easily put into version control and use as library code. For text-heavy documents, Clerk supports Markdown too.

• Incremental Computation

  Clerk keeps the feedback loop short by only computing what's changed using a dependency graph of Clojure vars. This enables caching executions across JVM restarts and machines.

• Rich Built-In Viewers

  Supports Markdown, Grid, HTML, Hiccup, SVG, Vega, Images, Plotly, TeX, tables, you name it. Plus, Clerk doesn't break a sweat when zooming into moderately-sized datasets.

• Moldable Viewers

  Create custom viewers for your problem at hand. Clerk's viewer API is extensible via predicate functions, not only acting on types but also on values. Build stateful viewers with Reagent and dynamically import JavaScript libraries.

• Static Publishing

  Produce static HTML pages and serve them from your local file system or any static webserver. If you like it batteries-included, take a look at clerk.garden, Clerk's simple GitHub-based publishing platform.

Use CasesSee Clerk Demos Repository

Clerk is compatible with any Clojure and JVM library enabling these amazing use cases by composing libraries from Clojure's eco-system.

Exploring the world in data using Vega, meta-csv and parsing Excel files with Docjure

Semantic Queries against the world's knowledge in WikiData with Mundaneum

Simulating physical systems with SICMUtils

Playing with cellular automata and Clerk's moldable viewers API

Making inside-out's library documentation interactive with custom CLJS macros

Controlling a spirograph animation using Open Sound Control and your iPhone