JS Run

2.99K reviews
Content rating
Everyone
500K+
Downloads
Content rating
Everyone
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About this app

Simple and lightweight application for Javascript coding and code execution.

Features:
- code execution/termination
- syntax highlighting
- line numbering
- dark/light theme
- save/open file
- code sharing
- auto-closing paired symbols
- personalization
- show "modified" file status

Please, note! Javascript modern features support depends on your mobile OS (the older Android you have - the older JS syntax is supported)
Simple and lightweight application for Javascript coding and code execution.
Updated on
Jul 24, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
    Learn more about how developers declare sharing
  • No data collected
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Ratings and reviews

2.84K reviews
Max Kowalski
May 23, 2023
This app is honestly pretty nice. It doesn't have a paid version, which is already really good, it has no ads, and guess what- it has a dark mode! Some keywords are color coded, and it also lets you save and load things! Only things I think could be better would be that whenever an error occurs, it skips lines with comments and such. This makes it difficult to see the issue. Other than that, I just want the console to scroll properly with loops.
9 people found this review helpful
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A Google user
November 10, 2018
Decent! Simple! Clean! But not great... yet! The console output is styled well. Array and object data outputted to the console is staggered and displayed in a very readable way, instead of as a long line of comma separated values strung together between two brackets, as with other poorly designed apps. One major problem is that there is no line numbering!! You'll have to count the lines yourself to find every "Error in line # :..." error. Another issue is the "run" button on the top toolbar. It should always be floating directly above the keyboard so that a user doesn't have to reach so far, to the top of the screen, to run code. Allow the option to position it to the right or left of the screen, for left handed users. At least "run" hides the keyboard when pressed to show the console, which is good. Next, the cursor is too sensitive. When there are many lines to scroll through, the cursor behaves badly and jumps about following the lowest line displayed or, sometimes, your scrolling finger. It should stay where it was left by the user, until explicitly re-positioned. Needs a few more themes and font styles/sizes.
44 people found this review helpful
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GPWC
January 22, 2023
Thanks for you feedback! FYI, there were some improvements in the app (actually some issues reported by you have been fixed). - Line numbers added - Now the code edit text area has a scroll bar, thus the "run" button is asways visible > Next, the cursor is too sensitive. Can you please provide more detailed steps?
Lucycan Ly
November 6, 2021
It's Good! I use it to practice a and trouble shoot code when away from the computer/laptop, which is quite often. My only complaint is that, when there is an error, the location of the error is not correct. For instance, my error will be on line 50, but it will say that it is on line "7"....... other than that... awesome...
34 people found this review helpful
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What’s new

Bug fixes, performance optimization