
CodePen
replit
JSFiddle
StackBlitz
GitHub
VS Code
JS Bin
Online playground for React

Stripo
BeeFree.io
Topol.io
Chamaileon.io
HTMLEmail.io
Templates by Email Monster
Unlayer
Create, edit and manage awesome email newsletters 😻

Which is more popular?
Based on our record, CodeSandbox seems to be a lot more popular than Postcards. While we know about 313 links to CodeSandbox, we've tracked only 4 mentions of Postcards.
Website, pricing, platforms and company facts side by side.
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| Website | codesandbox.io | designmodo.com |
| Pricing | — | |
| Company | Startup from The Netherlands · 1 - 9 employees · 2017 | — |
| Listed in |
What each product offers, as listed by its team.


Possible disadvantages
Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
Postcards is particularly recommended for marketers, designers, and small business owners who need to create professional email campaigns efficiently. It is also suitable for teams and organizations that want to streamline their workflow in crafting visually appealing email communications.
Walkthroughs and reviews on video.
A browser IDE that's actually GOOD? (CodeSandbox.io Review!)
More videos
Postcards From Penguin - Vintage Penguin Books Postcards - Unboxed And Reviewed!
More videos
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using CodeSandbox and Postcards. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Codesandbox is an online code editor and prototyping tool that makes creating and sharing web apps faster. Codesandbox: Online code editor and ide for rapid web development.
CodeSandbox can be thought of as a much more powerful and complete take on JSFiddle. True to its name, CodeSandbox provides a complete code editor experience and a sandboxed environment for front-end development.
The business license has all unlocked blocks, you can choose from 900+ Google Fonts, export to any email software you like. A license is $15 / month. Designmodo’s Postcards works with predesigned blocks and elements...
Recommendations tracked on public social media and blogs since March 2021.


To begin, you can start creating your own react app using the command line or can directly go to CodeSandbox if you want to skip using the command line which is faster. CodeSandbox is an online code editor and prototype tool that speeds... - Source: dev.to / 5 months ago
To begin, you can create a react app using the command line or any code editor (e.g., VSCode). You can also try using CodeSandbox as an online code editor that is simple to use and allows you to deploy your code. - Source: dev.to / 5 months ago
If you are in a rush to open unknown repos, use GitHub Codespaces or codesandbox with Copilot or another AI integration to analyze the repo for malicious intent and to run it in a safe environment. - Source: dev.to / 11 months ago
Postcards - Create awesome emails with drag & drop simplicity. - Source: dev.to / about 2 years ago
Know any good email template creators like https://designmodo.com/postcards/ or https://stripo.email/ ?P.S. Only needs to have an export HTML option. Not looking for email campaign tools. Source: over 3 years ago
Postcards is an HTML email template builder that gives its users access to a platform that allows them to communicate with their team in a multitude of ways. Your team will have the ability to share things in a joint cloud account,... - Source: dev.to / almost 5 years ago
When comparing CodeSandbox and Postcards, you can also consider the following products.


Stripo is an all-in-one email builder with a drag-and-drop editor and full HTML/CSS code editor in one tool, cutting production time by 3.7× — build emails of any complexity, including interactive AMP, really fast and easy.
Compare Stripo to CodeSandbox or Postcards:

Code, create, andlearn together. Use our free, collaborative, in-browser IDE to code in 50+ languages — without spending a second on setup.
Compare replit to CodeSandbox or Postcards:

Bee is MailUp's drag-&-drop editor for responsive design emails.
Compare BeeFree.io to CodeSandbox or Postcards:

Test your JavaScript, CSS, HTML or CoffeeScript online with JSFiddle code editor.
Compare JSFiddle to CodeSandbox or Postcards:

Create professional Email templates easily - Drag & Drop Email Builder.
Compare Topol.io to CodeSandbox or Postcards: