Mozilla Thimble

Website review by
Chad Sansing, Common Sense Media
Mozilla Thimble Website Poster Image

Product no longer available

Fantastic online editor teaches kids to write the Web.

Parents say

age 9+
Based on 2 reviews

Kids say

age 7+
Based on 1 review

Did we miss something on diversity?

Research shows a connection between kids' healthy self-esteem and positive portrayals in media. That's why we've added a new "Diverse Representations" section to our reviews that will be rolling out on an ongoing basis. You can help us help kids by suggesting a diversity update.

A lot or a little?

The parents' guide to what's in this website.

Stands out for positive messages.

Educational Value

Kids can learn the basics of HTML (hypertext mark-up language, the language of the Web) and CSS (cascading style sheets for web design). With starter projects, the advanced tutorials, and the Thimble editor, kids can remix and create their own Web projects. Through remixing others' work, kids can also learn about educational and transformative fair use, copyright, and open content licensing. Mozilla Thimble is an excellent free and open resource for teaching kids to code their own webpages.

Positive Messages

As part of Mozilla's Webmaker site, Thimble champions kids' authoring on the Web.


There is no violence in Thimble. Users can choose what content they put into webpages, but the mission and social standards of the Thimble community are completely kid-friendly.


Thimble encourages kids to be producers, rather than consumers, of online media.

Drinking, Drugs & Smoking

What parents need to know

Parents need to know that Mozilla Thimble is an online application that lets kids remix webpage projects and complete their own. Thimble is part of Mozilla's teaching resources site dedicated to making it easy and fun for kids to learn how the Web works. Kids can get started right away with sample activities, but will need to sign up for a free account to publish the projects and webpages they complete.

User Reviews

  • Parents say
  • Kids say
Adult Written byRajan D. August 23, 2016


It is a fun, interactive way to learn Javascript, CSS or HTML.

It may be hard for younger people to use the website though.
Adult Written byravi1610 August 14, 2013

Mozilla Thimble amazing code editor.

Really simple with great interface.

There aren't any reviews yet. Be the first to review this title.

What's it about?

Kids can find \"starter projects\" to help them begin making webpages in MOZILLA THIMBLE. As soon as a project loads, kids can remix code in one window and see the effects of their changes in the window next door. As kids come to recognize the HTML \"tags\" or codes for things like colors, fonts, and images, they can begin predicting what their changes will do. When kids are ready to author their own webpages, they can create new Thimble projects. By publishing projects and webpages, kids can share their authentic webmaking with others.

Is it any good?

Thimble is an excellent tool for teaching HTML and making webpages. Because it shows two windows at once -- one for code and the other for the webpage -- it's always clear to kids how what they do in the code changes the appearance and content of the webpage. Thimble's starter projects give kids easy and fun ways to begin coding, but the editor and more challenging projects let Thimble scale up for more in-depth learning about HTML and how webpages work.

The authors of each project take care to include helpful instructions, and the Webmaker community is full of mentors ready to answer questions about Thimble and the Web. Thimble teaches kids to write code in a much more welcoming and supportive way than most other learn-to-code sites do.

Talk to your kids about ...

  • Families can explore how webpages work and how to build web pages with HTML.

  • Families can discuss what kind of information is OK to share online and what kinds of information should be kept private.

  • Have kids apply their new web-authoring skills by creating new webpages for family events, interests, or trips.

  • Families can talk about the different kinds of web content (such as memes) and how web pages communicate different kinds of messages.

Website details

  • Subjects: Language & Reading: reading, reading comprehension, text analysis, writing
    Math: patterns, ratio
    Hobbies: building
  • Skills: Thinking & Reasoning: decision-making, part-whole relationships, problem solving, thinking critically
    Creativity: developing novel solutions, making new creations, producing new content
    Self-Direction: achieving goals, work to achieve goals
    Emotional Development: developing resilience, moving beyond obstacles, persevering
    Communication: conveying messages effectively, multiple forms of expression, presenting
    Collaboration: group projects, meeting challenges together
    Responsibility & Ethics: following codes of conduct, honoring the community, making wise decisions
    Tech Skills: digital creation, using and applying technology
  • Genre: Educational
  • Topics: STEM
  • Price: Free
  • Pricing structure: Free
  • Last updated: November 11, 2020

Our editors recommend

For kids who love creating

Themes & Topics

Browse titles with similar subject matter.

Common Sense Media's unbiased ratings are created by expert reviewers and aren't influenced by the product's creators or by any of our funders, affiliates, or partners.

See how we rate

About these links

Common Sense Media, a nonprofit organization, earns a small affiliate fee from Amazon or iTunes when you use our links to make a purchase. Thank you for your support.

Read more

Our ratings are based on child development best practices. We display the minimum age for which content is developmentally appropriate. The star rating reflects overall quality and learning potential.

Learn how we rate