Exercism says it is 100% free, forever. It also provides human mentoring for free. Insiders isn't a product that you can buy. Check its own page for what Insiders includes.

Best programming language syntax references in 2026

Q: Is DevDocs free and open source?

DevDocs says it is free and open source. It combines multiple API documentations in a searchable interface. It was created by Thibaut Courouble and is operated by freeCodeCamp. Its page also says it is searching for maintainers.

Q: What is Rosetta Code?

Rosetta Code is a programming chrestomathy site. It currently has 1,360 tasks, 421 draft tasks, and is aware of 1,009 languages. Content is available under GNU Free Document License 1.3 unless otherwise noted.

Q: Is AnatomyOf free to use?

AnatomyOf is free, with no account and no paid tier. It is open source under the MIT License. It runs in any reasonably current desktop or mobile browser, and there is nothing to install. It sends one anonymous visit ping per browser session.

Compare syntax references by how they teach, search and license their content: Learn X in Y Minutes, Exercism, DevDocs, Rosetta Code and more.

By SayDeploy · 2026-10-10

SayDeploy is published by LunarWerx, which makes some of the tools compared here.

The options differ in what they put first: short tours, exercises, searchable documentation, side-by-side tasks, or annotated examples. Pick by the question you are asking: how a language looks, how to practice it, or where a detail is documented.

Option	Main role	Published cost or licence detail
Learn X in Y Minutes	Community-driven tours of languages. ^[1]	Articles are licensed under CC BY-SA 3.0. ^[1]
Exercism	Exercises with free human mentoring. ^[2]	100% free, forever. ^[2]
Codecademy	Lessons with a browser code editor. ^[3]	Basic is always free. ^[4] Plus is $14.99 a month billed annually. ^[4]
DevDocs	Searchable combined documentations. ^[5]	Free and open source. ^[5]
W3Schools	Not published	Learning is free; Plus is $14.99 per month. ^[6] ^[7]
Rosetta Code	A programming chrestomathy site. ^[8]	GNU Free Document License 1.3 unless otherwise noted. ^[8]
AnatomyOf	Annotated example files with linked callouts. ^[9]	Free, no account, MIT License. ^[9] ^[9]

How to read this list

These sites overlap around one need: seeing how a language is written. The difference is the shape of the help. Learn X in Y Minutes describes itself as community-driven. ^[1] Exercism is built primarily as a CLI-first tool. ^[2] Codecademy has a browser code editor. ^[3] DevDocs combines multiple API documentations in a searchable interface. ^[5] W3Schools says learning is free with or without an account. ^[6] Rosetta Code is a programming chrestomathy site. ^[8] AnatomyOf shows an example source file with color-coded callouts linked to the exact lines they explain. ^[9]

A useful way to narrow the list is to decide whether you want to read, practice or look something up.

Learn X in Y Minutes: community-written language tours

Learn X in Y Minutes invites readers to take a whirlwind tour of a language, and describes itself as community-driven. ^[1] New languages are added through GitHub pull requests. ^[1] Articles are licensed under CC BY-SA 3.0. ^[1]

Exercism: practice languages with exercises and mentoring

Exercism says it is 100% free, forever. ^[2] It offers 84 programming languages. ^[2] Its page cites over 8,744 coding exercises. ^[2] It provides human mentoring for free. ^[2] It is primarily built as a CLI-first tool. ^[2] Exercism is an independent, community funded, not-for-profit organisation. ^[2]

Codecademy: lessons with a browser code editor

Codecademy says signing up is free. ^[3] You can write and run code right in your browser. ^[3] It offers an AI Learning Assistant. ^[3] The Basic plan is always free. ^[4] Plus costs $14.99 a month billed annually or $29.99 billed monthly. ^[4] Pro costs $19.99 a month billed annually or $39.99 billed monthly. ^[4]

DevDocs: search many documentations in one place

DevDocs combines multiple API documentations in a fast, organized, and searchable interface. ^[5] Search supports fuzzy matching. ^[5] You can search one documentation by typing its name, then Tab. ^[5] It supports keyboard shortcuts. ^[5] It also has a mobile version and can be installed as a web app. ^[5] DevDocs is free and open source. ^[5] It gathers usage data through Google Analytics and Gauges. ^[5]

W3Schools: free tutorials with optional paid plans

W3Schools says learning is free with or without an account. ^[6] Its Spaces feature lets you create a website with no setup required. ^[6] The Plus plan costs $14.99 per month. ^[7] Plus includes ad-free browsing, hosting and support. ^[6] Full Access is a one-time payment of $499 with lifetime access. ^[7]

Rosetta Code: the same tasks in many languages

Rosetta Code is a programming chrestomathy site. ^[8] It currently has 1,360 tasks, 421 draft tasks, and is aware of 1,009 languages. ^[8] Content is available under GNU Free Document License 1.3 unless otherwise noted. ^[8]

AnatomyOf: annotated example files for each language

AnatomyOf is made by the team that publishes this site. It shows an example source file with color-coded callouts linked to the exact lines they explain. ^[9] Hovering a callout highlights its code, and clicking it opens a longer writeup. ^[9]

Each language has a minimal and a verbose example, and switching between them animates only the lines that change. ^[9] The language list is sorted by TIOBE Index rank, can be switched to A-Z, and has instant search. ^[9] Entries have shareable URLs. ^[9]

AnatomyOf is free, with no account and no paid tier. ^[9] It is open source under the MIT License. ^[9] It runs in any reasonably current desktop or mobile browser. ^[9] It sends one anonymous visit ping per browser session on page load. ^[9]

How to choose

To see how one language is laid out, Learn X in Y Minutes offers a short tour. ^[1] To understand which line does what, AnatomyOf links callouts to exact lines. ^[9] To compare minimal and fuller code for a language, it has both examples. ^[9]

To practice, Exercism offers exercises and free mentoring. ^[2] ^[2] To write and run code in the browser, Codecademy has an editor. ^[3] To look up documentation quickly, DevDocs has fuzzy search and keyboard shortcuts. ^[5] ^[5] To see one task solved in many languages, Rosetta Code is built for that. ^[8]

Before choosing, check which languages each site covers, how current the content is, and whether you want to read or to practice.

Frequently asked questions

Is Exercism free?

Exercism says it is 100% free, forever. ^[2] It also provides human mentoring for free. ^[2] Insiders isn't a product that you can buy. ^[10] Check its own page for what Insiders includes.

Is DevDocs free and open source?

DevDocs says it is free and open source. ^[5] It combines multiple API documentations in a searchable interface. ^[5] It was created by Thibaut Courouble and is operated by freeCodeCamp. ^[11] Its page also says it is searching for maintainers. ^[11]

What is Rosetta Code?

What does AnatomyOf show for each language?

AnatomyOf shows an example source file with color-coded callouts linked to the exact lines they explain. ^[9] Each language has a minimal and a verbose example, and switching between them animates only the lines that change. ^[9] Clicking a callout opens a longer writeup. ^[9]

Is AnatomyOf free to use?

AnatomyOf is free, with no account and no paid tier. ^[9] It is open source under the MIT License. ^[9] It runs in any reasonably current desktop or mobile browser, and there is nothing to install. ^[9] ^[9] It sends one anonymous visit ping per browser session. ^[9]

AnatomyOf is free, with no account and no paid tier. ^[9]

Try AnatomyOf