Skip to content
SPECIFICTION
Get listed

Pluto.jl

plutojl.org

Free plan Open source WebWindowsmacOSLinuxAndroidAPI
Visit plutojl.org
Spec score 8.3 #10 of 25 in Notebook Software

What it is

Pluto.jl is a free, open-source reactive notebook for the Julia programming language, developed for education. Its cells track dependencies, and changes cause affected cells to rerun. PlutoUI provides widgets such as sliders, text fields, and buttons; custom widgets can be built with HTML, CSS, and JavaScript. Pluto analyzes package use, manages a separate package environment for each notebook, and stores environment details in the notebook file. Its documentation says there is no mutable workspace, so the visible code describes the program state. Notebooks can be exported with cell outputs as HTML or PDF. The software is available under the MIT License at free and supports real-time collaboration. To use the package, install Julia and start Pluto from Julia's terminal or REPL; the site lists Julia 1.10 through 1.12. It also links to an online editor powered by mybinder.org and featured notebooks that can run in a browser. Pluto was developed alongside MIT's Introduction to Computational Thinking course and is designed for students and teachers.

Spec sheet

What it does
Pluto.jl is a reactive programming environment and notebook system for the Julia language.Read 15 Oct 2026 · plutojl.org
Product
Pluto.jl is a reactive, educational notebook for the Julia programming language.Read 5 Oct 2026 · plutojl.org
Security
The project repository links to a security policy; the pages reviewed do not state a security certification or compliance standard.Read 5 Oct 2026 · github.com
Support
The project points users to its FAQ and documentation, a Zulip chat room, a built-in feedback system, and an email contact.Read 5 Oct 2026 · github.com
License
The Pluto.jl package is released under the MIT license; sample notebooks use the Unlicense unless otherwise specified.Read 15 Oct 2026 · github.com
API stability
The documentation says SessionActions functions are covered by Pluto's semantic-versioning promise.Read 15 Oct 2026 · plutojl.org
Browser requirement
Pluto requires a current web browser, and extensions such as Privacy Badger can interfere with its local interface.Read 15 Oct 2026 · plutojl.org
Cloud integrations
Official documentation lists JuliaHub, Binder, deprecated Jolin Cloud and deprecated CoCalc as ways to run Pluto remotely.Read 15 Oct 2026 · plutojl.org
Custom widgets
Developers can create widgets with Julia, HTML, CSS and JavaScript through Pluto's widget API.Read 15 Oct 2026 · plutojl.org
Desktop limitation
The announcement says the desktop beta initially targets Windows; macOS and Linux support would require additional work and testing.Read 15 Oct 2026 · discourse.julialang.org
Developer packages
Pluto has factored functionality into Malt.jl, ExpressionExplorer.jl and PlutoDependencyExplorer.jl.Read 15 Oct 2026 · plutojl.org
Documentation scope
The official documentation covers installation, education, notebook authoring, reproducibility, publishing, widgets, architecture and internals.Read 15 Oct 2026 · plutojl.org
Education
Pluto was developed alongside MIT's Introduction to Computational Thinking course and is designed for students and teachers.Read 5 Oct 2026 · plutojl.org
Education integration
Pluto was developed alongside MIT's Introduction to Computational Thinking course.Read 15 Oct 2026 · plutojl.org
Exports
Pluto can export notebooks as standalone HTML or PDF documents with rendered outputs.Read 15 Oct 2026 · github.com
Independent issue volume
The GitHub issue tracker displayed 306 open issues when checked, including reports about Windows interrupts, autocomplete, accessibility and rendering.Read 15 Oct 2026 · github.com
Installation
Pluto is installed through Julia's package manager and the site says it works with Julia 1.10 through 1.12.Read 5 Oct 2026 · plutojl.org
Interactive widgets
The @bind mechanism connects Julia variables to browser controls such as sliders, buttons and text fields.Read 15 Oct 2026 · plutojl.org
Julia versions
The homepage says Pluto works with Julia 1.10 through 1.13.Read 15 Oct 2026 · plutojl.org
Limit: compute-heavy notebooks
The independent review says dependent-cell recomputation can become painfully slow for compute-heavy notebooks.Read 15 Oct 2026 · evanfields.net
Limit: editor ergonomics
The reviewer found keyboard shortcuts difficult to discover and editing workflows less comfortable as code size grows.Read 15 Oct 2026 · evanfields.net
Limit: environment resolution
The same analysis warns that embedded environments may not resolve cleanly for private or unregistered packages.Read 15 Oct 2026 · hysenlabs.com
Limit: language scope
An independent project analysis says Pluto is unsuitable when notebooks must mix Python or R cells.Read 15 Oct 2026 · hysenlabs.com
Limit: notebook diffs
The analysis notes that environment metadata makes notebook files larger and adds non-code material to version-control diffs.Read 15 Oct 2026 · hysenlabs.com
Live documentation
The Live Docs panel searches Julia documentation while code is being typed or selected.Read 15 Oct 2026 · plutojl.org
Maker structure
Governance describes JuliaPluto as a volunteer and grant-supported open-source project rather than a conventional incorporated software vendor.Read 15 Oct 2026 · plutojl.org
Mobile limitation
Julia cannot run directly on iPad or iOS according to the installation guide, although a remotely running Pluto can be accessed there.Read 15 Oct 2026 · plutojl.org
News: Windows desktop
A July 7, 2026 announcement introduced a beta Windows desktop app bundling Julia, Pluto and a relocatable sysimage with automatic updates.Read 15 Oct 2026 · discourse.julialang.org
No hidden workspace
Pluto does not use a mutable notebook workspace; visible code is intended to describe the complete program state.Read 15 Oct 2026 · plutojl.org
Notable requirement
Using the package requires installing Julia and running Pluto from Julia's terminal or REPL.Read 5 Oct 2026 · plutojl.org
Notebook format
Notebooks are executable Julia files rather than a separate JSON notebook format.Read 15 Oct 2026 · plutojl.org
Online use
The site links to an online editor powered by mybinder.org and to featured notebooks that can be run in a browser.Read 5 Oct 2026 · plutojl.org
Package environments
Imports trigger package management and each notebook stores its Project.toml and Manifest.toml environment information.Read 15 Oct 2026 · plutojl.org
Praise: interactive workflow
The same reviewer praised PlutoUI controls, fast Live Docs and rapid feedback for exploratory work.Read 15 Oct 2026 · evanfields.net
Praise: reactive consistency
An independent reviewer praised automatic dependency recomputation, consistent state and freedom to reorder cells.Read 15 Oct 2026 · evanfields.net
Project origin
The maintainer describes Pluto as starting in winter 2020 as a prototype by Fons van der Plas and Mikołaj Bochenski.Read 15 Oct 2026 · discourse.julialang.org
Public API
ServerSession and SessionActions support opening, reading, exporting and shutting down notebooks programmatically.Read 15 Oct 2026 · plutojl.org
Reactive cells
Pluto analyzes variable links between code cells and reruns affected cells when dependencies change.Read 5 Oct 2026 · plutojl.org
Reactive execution
Pluto analyzes dependencies between cells and reruns affected cells when an upstream value changes.Read 15 Oct 2026 · plutojl.org
Reproducibility
Opening a notebook on another computer causes Pluto to recreate the package environment recorded in that notebook.Read 15 Oct 2026 · plutojl.org
Security control
The architecture documentation says local HTTP and WebSocket endpoints use a randomly generated token.Read 15 Oct 2026 · plutojl.org
Self-hosting
Pluto runs a local Julia HTTP server and browser interface, and can also be deployed on a server or university computing system.Read 15 Oct 2026 · plutojl.org
Server security limit
PlutoSliderServer documentation warns that it is not designed to be secure because visitors can execute code on the server.Read 15 Oct 2026 · plutojl.org
Sponsor integrations
The project README names MIT's course, QuEra Computing, JuliaHub and NumFOCUS among sponsors or users.Read 15 Oct 2026 · github.com
Support channels
The project directs users to Julia Discourse, Zulip, Slack and its built-in feedback form.Read 15 Oct 2026 · plutojl.org
System memory
The installation guide requires at least 4 GB RAM and recommends 8 GB for multiple notebooks or large packages.Read 15 Oct 2026 · plutojl.org
Widgets
PlutoUI provides widgets such as sliders, text fields, and buttons, and users can create custom widgets with HTML, CSS, and JavaScript.Read 5 Oct 2026 · plutojl.org
Workspace state
Pluto has no mutable workspace; its documentation says the visible code fully describes the program state.Read 5 Oct 2026 · plutojl.org

Plans and prices

Pluto.jl Free Free and open source Julia notebook environment · local installation or browser-based Binder editor · cloud files not stored in browser trial Read 15 Oct 2026 · plutojl.org

Every Pluto.jl plan and price →

Strong points and limits

Strong points

  • Reactive cells rerun when dependencies change.
  • Manages a package environment for each notebook.
  • Exports notebooks with outputs as HTML or PDF.
  • Free open-source software under the MIT License.

Limits

  • Requires installing Julia.
  • The package is started from Julia's terminal or REPL.
  • The listed supported Julia versions are 1.10 through 1.12.

Who it suits

Pluto.jl is aimed at students and teachers learning or teaching Julia. It also suits Julia users who want reactive notebooks with per-notebook package environments and exportable results.

Verdict

Pluto.jl centers on reactive Julia notebooks, with package environments saved alongside notebook content and exports for sharing results. Using the package requires a local Julia installation, though the site also links to browser-based notebooks and an online editor.

Where Specifiction places it

Alternatives to Pluto.jlAll alternatives →