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CodeTester
codetester.io
Code Testing Widget
Just run some code and see the output - with support for C, C++, Python, Ruby, Javascript, and Java Run Code · A tool that lets you create custom online tests to screen developers Coding Assessment Tool
Code Tester
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CodeTester · Login · A free online coding assessment tool. Allows you to create custom coding questions to assess developers automatically · Features · Ability to create custom code assessments · Fully automated · Ability to review code submissions · How-To · AcidWorx, LLC © 2024 · ...
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JSFiddle
jsfiddle.net
JSFiddle - Code Playground
JSFiddle - Test your JavaScript, CSS, HTML or CoffeeScript online with JSFiddle.
Discussions

Is there an app or website to check my code?
Thank you for posting on r/CodingHelp ! Please check our Wiki for answers, guides, and FAQs: https://coding-help.vercel.app Our Wiki is open source - if you would like to contribute, create a pull request via GitHub! https://github.com/DudeThatsErin/CodingHelp We are accepting moderator applications: https://forms.fillout.com/t/ua41TU57DGus We also have a Discord server: https://discord.gg/geQEUBm I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns. More on reddit.com
🌐 r/CodingHelp
10
1
4 weeks ago
How do your professors check your code?
Gradescope autograder More on reddit.com
🌐 r/csMajors
23
15
September 10, 2022
"Code plagiarism detector"

there most likely will be people who will have almost the same code or even exactly the same

This depends on how exactly the assignment is structured, but you'd be surprised. I spent a lot of time grading student assignments as a TA back in college, and it was surprising just how off-the-rails some submissions would be, even for seemingly simple assignments.

(And if two assignments go off-the-rails in nearly the same way...)

Have you heard of anyone that has been caught by this "anti-cheat" software?

My alma mater generally cast a wide net by tuning the cheating detectors to be overzealous. The people who were flagged could were then called down at the end of the quarter and presented their case to a course administrator.

That generally seemed to do a reasonable job of catching actual cheaters while only mildly inconveniencing non-cheaters.

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🌐 r/learnprogramming
7
2
October 5, 2016
Code copypasta increasingly common in CS education

Most of these academic violations across all universities exist at the introductory CS level. There are a few reasons why this is the case:

  1. Professors re-use assignments, allowing students to get code from others who have already taken the course. This re-use is usually not due to neglect; it takes a tremendous amount of work to create a well-crafted, bug-free, and bulletproof assignment write-up. Re-using this work is a necessity to ensure a high-quality course.

  2. Collaboration policies are frequently vague. In introductory CS, the line between "don't share your code" and "talk about high-level algorithmic concepts" is extremely blurry. Most cases of academic dishonesty are not ultra-blatant cheating rings but cases that straddle this line. They usually represent instances where students are not (completely) aware that what they are sharing is a violation of the course policies.

  3. Introductory CS course enrollments are at an all-time high across the board. More students in the classroom means less time for personalized instructions and feedback where these fuzzy cases of academic dishonesty can be addressed and discharged in a reasonable manner where learning occurs (instead of discipline).

That being said, the tools to catch code plagiarism are fairly robust and reliable (and free to use, at least in the case of the tool I'm thinking of). My colleagues and I have conjectured that the robustness of our tools is actually the reason that computer science has inflated plagiarism rates. Other disciplines likely encounter the same levels of academic dishonesty, but they don't have the means to detect such instances at the level that we can.

EDIT: be aware, there's a lot of painful misinformation in this thread about what instructors do and why they do it with respect to assignments and plagiarism. If anyone has any specific questions about CS instruction, I'm happy to answer them here or privately.

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🌐 r/programming
182
245
July 21, 2013
People also ask

How do you use a code checker?

Integrating code checkers into existing developer workflows is a great way to fix code issues earlier, while also helping developers learn about best practices. This can make a significant impact on the quality and security of code that developers write going forward. More maintainable code can also improve the customer experience because there are fewer bugs and technical debt to deal with in the future.

When it comes to static application security testing (SAST) with a code checker, it’s important to choose a developer-first tool that integrates into developer workflows and produces minimal false positives in scan results. A SAST tool also needs to take a comprehensive approach for scanning source code, and be able to combine with linters to check code syntax and style.

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Can AI check my code for bugs?

Yes. the Snyk Code Checker and its AI engine are informed by open source knowledge and curated by security experts, enabling it to detect complex bugs and security issues that may evade manual code review. With near real-time scanning and automated remediation suggestions, it accelerates development and elevates code safety. This human-in-the-loop AI approach ensures developers get not just flags but meaningful fixes in context, faster than ever.

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snyk.io
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A code checker is an automated software that statically analyzes source code and detects potential issues. Most code checkers provide in-depth insights into why a particular line of code was flagged to help software teams implement coding best practices. These code-level checks often measure the syntax, style, and documentation completeness of source code.

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Mydetector
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Check your code, find any errors, and identify vulnerabilities with Snyk's free AI code checker. Powered by Snyk Code, for enhanced code security.
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codepen.io
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16 Great Websites to Test Code Online in 2025 | Turing
February 21, 2025 - Useful for checking PHP code quality. Supports many PHP versions. Allows for customization of linting rules. Provides detailed explanations for linting errors. ... Limited to PHP It is limited to PHP, and doesn’t support other languages. No real-time output. ... OneCompiler is a free online compiler tool.
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ChatGPT
chatgpt.com › g › g-BS0ITo8Dj-code-checker
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YesChat
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Paste your code into the provided text area. Click the 'Check Code' button to initiate the analysis.
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Tiiny Host
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coderabbit.ai
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Check test coverage and immediately generate any missing tests. Create docstrings to make it easier to understand the file in the future. ... We protect your code and privacy with an architecture designed to ensure your code is private.
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OneCompiler
onecompiler.com
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BairesDev
bairesdev.com › tools › phpcodechecker
PHP Code Checker - Syntax Check for Common PHP Mistakes
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Sweetmag
sweetmag.digital › home › 10 websites to test your codes online
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January 15, 2024 - This online demo site from ESLint can you help you try on how each rule works against your code before even installing the NPM packages. It provides the full list of rule you can toggle on and off. When it’s all set you can download the config file to add it in your project. PHPStan is code static analysis tool for PHP. It checks for code errors and potential bugs without actually running the code.
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Hongkiat
hongkiat.com › home › 10 websites to test your codes online
10 Websites to Test Your Codes Online - Hongkiat
April 6, 2023 - This online demo site from ESLint can you help you try on how each rule works against your code before even installing the NPM packages. It provides the full list of rule you can toggle on and off. When it’s all set you can download the config file to add it in your project. PHPStan is code static analysis tool for PHP. It checks for code errors and potential bugs without actually running the code.
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Galaxy
galaxy.ai › ai-code-checker
Free AI Code Checker (No Login Required) | Galaxy.ai
Analyze your code for bugs, security vulnerabilities, and performance issues with our free AI-powered Code Checker. No login required.
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Reddit
reddit.com › r/codinghelp › is there an app or website to check my code?
r/CodingHelp on Reddit: Is there an app or website to check my code?
4 weeks ago -

Sometimes my code will say 0 errors within whatever platform I'm using. I'm still in school so the platform I work on changes a lot. However 0 errors and it won't work. I used to run my code through chatgpt just to see what the error was, usually a typo somewhere, but I don't like using chatgpt for various reasons. Is there any non-AI things I can use?