List of the Top 25 Free Debugging Tools in 2025

Scout Monitoring goes beyond traditional Application Performance Monitoring by providing insights that charts alone cannot deliver. Scout APM serves as a vital tool for developers, enabling them to detect and address performance issues proactively, ensuring that customers are not affected by these problems. Its real-time alerting features, user-friendly interface aimed at developers, and tracing capabilities that connect performance bottlenecks directly to the source code allow for more efficient debugging, giving developers the freedom to focus on creating exceptional products. With a lightweight agent that effectively monitors necessary dependencies, users can swiftly identify, prioritize, and resolve a range of performance challenges, such as memory leaks, N+1 query issues, and sluggish database responses. Scout APM is versatile, supporting applications built in Ruby, PHP, and Python, making it an essential tool for developers across various programming languages. By leveraging Scout APM, teams can enhance their applications' performance and deliver a smoother experience for their users.

Leverage the capabilities of Telerik Fiddler HTTP(S) proxy to capture all web traffic flowing between your computer and external websites, which enables you to examine that traffic, establish breakpoints, and adjust both requests and responses as needed. Fiddler Everywhere acts as a flexible web debugging proxy that is compatible with macOS, Windows, and Linux operating systems. It allows for the capturing, inspection, and monitoring of all HTTP(S) communications, making it easier to mock requests and address network issues. This tool can be utilized with any browser or application, providing the ability to debug traffic on macOS, Windows, Linux, and mobile devices running either iOS or Android. It ensures the proper exchange of essential cookies, headers, and caching settings between the client and server. Supporting a variety of frameworks including .NET, Java, and Ruby, Fiddler Everywhere equips you with the tools to efficiently mock or modify requests and responses on any website. This user-friendly approach enables testing of website functionality without necessitating any code changes. With Fiddler Everywhere, you can comprehensively log and analyze all HTTP/S traffic between your machine and the broader internet, thereby enhancing your debugging efficiency and allowing for more in-depth inspection of network interactions. Ultimately, this tool streamlines the process of identifying and resolving issues that might affect your web applications.

Bugsnag delivers in-depth monitoring of application stability, which helps teams decide whether to focus on new feature development or fix existing issues. As a comprehensive full-stack stability monitoring tool specifically designed for mobile applications, it provides sophisticated diagnostics that allow for effective error replication. Featuring an intuitive interface, Bugsnag enables seamless management of all your applications from a unified dashboard. It plays a critical role in evaluating app health, enhancing collaboration between product and engineering teams. Not every bug necessitates urgent resolution, which allows you to prioritize issues that have a substantial effect on your business. Its extensible libraries are equipped with thoughtful defaults and numerous customization possibilities. Moreover, the team consists of dedicated experts who are deeply committed to reducing errors and maintaining the overall health of your applications, making Bugsnag an essential resource for developers. By leveraging these capabilities, developers can enhance their workflow and deliver a more stable user experience.

Bugfender offers comprehensive log storage solutions tailored for developers, featuring a remote logger, crash reporting, and in-app feedback capabilities. By capturing all activities within an application, including during crashes, Bugfender enables quicker bug reproduction and resolution, enhancing customer support. It ensures user privacy, operates efficiently without draining the network or battery, and continues logging even when devices are offline. With Bugfender, developers can identify and eliminate bugs before they impact users, logging issues across all devices and delivering results within moments. This proactive approach helps maintain high app ratings, as Bugfender tracks more than just crashes; it gathers essential data to better understand user behavior and preferences. Furthermore, the tool empowers developers to engage with specific users, facilitating personalized customer service that can significantly elevate user satisfaction and loyalty. By utilizing Bugfender, developers can not only improve their applications but also create a more tailored experience for their users.

You can swiftly navigate through network traffic by emphasizing content type, status, and source. Alternatively, you can utilize robust filtering options that align your messages with the most significant ones. With the help of MDN's inline explanations and documentation, you can scrutinize the URL, status, headers, and body of individual requests or responses. Additionally, you have the ability to examine message bodies with features like highlighting and automatic formatting for JSON, HTML, JavaScript, and other formats, all facilitated by Monaco, the editor integrated into Visual Studio Code. You can accurately match requests, seamlessly jump to them as they come in, and modify details such as the target URL or method, headers, and body. Decisions can be made to either reply manually to incoming requests or to forward them upstream. On the return path, you can pause to alter the actual response as needed. You can navigate through HTTP traffic one request at a time or deliberately simulate errors and endpoints for testing. For rapid prototyping against new services or endpoints, you can create specific rules that correspond to incoming requests, ensuring a tailored approach to development. This flexibility allows for a comprehensive exploration and manipulation of HTTP interactions.

Ambassador Edge Stack serves as a Kubernetes-native API Gateway that delivers ease of use, robust security, and the capability to scale for extensive Kubernetes environments globally. It simplifies the process of securing microservices by offering a comprehensive suite of security features, which encompass automatic TLS, authentication, and rate limiting, along with optional WAF integration. Additionally, it facilitates fine-grained access control, allowing for precise management of user permissions. This API Gateway functions as an ingress controller based on Kubernetes, and it accommodates an extensive array of protocols, such as gRPC, gRPC Web, and TLS termination, while also providing traffic management controls that help maintain resource availability and optimize performance. Overall, Ambassador Edge Stack is designed to meet the complex needs of modern cloud-native applications.

PlatformIO is a pioneering collaborative platform tailored for embedded development, enabling users to save time and resources by drastically reducing the costs and efforts associated with software development and upkeep. The embedded systems industry is in urgent need of a revolutionary solution, as numerous current IDEs and tools are based on obsolete technology from the 1990s, leading to complicated requirements and platform-specific setups that deter talented developers from entering the field of embedded engineering. As the top-rated IDE option for Microsoft Visual Studio Code, it provides a user-friendly and highly modular integrated development environment along with a robust array of professional development tools. These tools are specifically designed to improve both the efficiency and ease of creating and delivering embedded products. Moreover, PlatformIO is developed solely in pure Python, which guarantees its operation without reliance on any external libraries or system tools, thereby simplifying the development process and promoting a more effective workflow. Its dedication to modernizing the landscape of embedded development positions it as an indispensable resource for developers eager to push the boundaries of innovation in this area. By embracing the advantages of such a platform, developers can not only enhance their productivity but also contribute to the evolution of embedded engineering as a whole.

Actively seek out, anticipate, and correct issues using the platform designed for ongoing enhancements to code quality. This approach ensures a more efficient development process and fosters a culture of continuous learning and improvement.

You have the option to utilize your preferred debugging software to address issues with your Kubernetes services on a local level. Telepresence, an open-source solution, facilitates the execution of a single service locally while maintaining a connection to a remote Kubernetes cluster. Originally created by Ambassador Labs, known for their open-source development tools like Ambassador and Forge, Telepresence encourages community participation through issue submissions, pull requests, and bug reporting. Engaging in our vibrant Slack community is a great way to ask questions or explore available paid support options. The development of Telepresence is ongoing, and by registering, you can stay informed about updates and announcements. This tool enables you to debug locally without the delays associated with building, pushing, or deploying containers. Additionally, it allows users to leverage their preferred local tools such as debuggers and integrated development environments (IDEs), while also supporting the execution of large-scale applications that may not be feasible to run locally. Furthermore, the ability to connect a local environment to a remote cluster significantly enhances the debugging process and overall development workflow.

This tool is open-source and free, functioning seamlessly across multiple platforms while serving all EVM blockchains. The Solidity Debugger Pro (sdbg) is a VS Code extension that enriches the debugging process for Solidity projects by providing a vast array of features. It supports all EVM-compatible blockchains, allowing developers to effectively debug their smart contracts both locally and via forked nodes. Furthermore, sdbg is equipped with integrated debugging support tailored for the popular Hardhat framework, which streamlines the development workflow. By offering such comprehensive functionalities, sdbg greatly enhances the debugging efficiency in Solidity projects, ultimately leading to a more productive development experience. This makes it an invaluable asset for developers looking to optimize their smart contract debugging process.

Errsole is an open-source logging tool designed for Node.js applications, offering a free solution that comes equipped with a log viewer for convenient log management, filtering, and searching. 1) Simple Integration: Integrating the Errsole package into your existing codebase is straightforward—there's no requirement for dedicated servers, complex installations, or intricate setups. 2) Enhanced Logging: Errsole captures all console logs from Node.js automatically and features enhanced logging capabilities that allow for multiple log levels and the option to add metadata to each log entry. 3) Flexible Storage: You have the freedom to store your logs in any preferred location, be it a file or a database of your choice, and you can also set up log rotation to determine how long each log should be kept. 4) Intuitive Log Dashboard: The built-in Web Dashboard lets you view, filter, and search through logs easily, with secure authentication and team management features ensuring controlled access to log data. 5) Immediate Error Alerts: Receive prompt notifications if your application crashes or faces critical errors, including essential details such as the error message, app name, environment, server name, and a direct link for quick access to the relevant logs. 6) User-Friendly Experience: With Errsole, developers can enjoy a user-friendly logging experience that streamlines the process of monitoring application performance and addressing issues efficiently.

Effortlessly oversee and resolve application errors in mere minutes with Airbrake, a powerful tool designed for error detection and monitoring. Its efficient features empower users to quickly identify, assess, and rectify problems, encompassing parameters, stack traces, and affected users. The platform offers detailed dashboards that facilitate easy tracking and management of errors, making the process streamlined and efficient. Furthermore, Airbrake's web application is optimized for mobile use, allowing you to manage errors on the go, regardless of your location. This adaptability not only enhances productivity but also positions Airbrake as an indispensable asset for developers aiming to improve the reliability of their applications. By utilizing Airbrake, teams can ensure a smoother user experience and minimize downtime effectively.

RubyMotion empowers developers to rapidly build native applications for iOS, Android, and OS X, all while using their favorite text editor and the cherished Ruby programming language. It features a version of Ruby that has been statically compiled specifically for mobile environments, complemented by a command-line toolchain that can be customized to fit individual development workflows. With RubyMotion, those familiar with Ruby can dive into creating applications for both iOS and Android without delay. This method not only boosts the enjoyment and efficiency of developers but also promotes code sharing between different platforms, which can lead to substantial time savings and faster project completion. Additionally, by keeping a uniform programming language across different systems, teams can cultivate better collaboration and more efficient development processes, enhancing overall project outcomes. As a result, developers can focus more on innovation rather than getting bogged down by language discrepancies.

Thundra empowers application teams to build, troubleshoot, test, and oversee contemporary microservices in cloud environments. By providing a comprehensive platform that integrates automated instrumentation, cloud application debugging, and test optimization, Thundra removes the necessity for various tools across both pre-production and production stages. The company features two key products: Thundra Foresight, designed to assist in monitoring and resolving issues within your CI workflows and tests, and Thundra APM, which specializes in application performance monitoring for serverless architectures and containerized applications. Additionally, this unified approach streamlines the development process, enhancing team productivity and efficiency.

Transform your log management practices with Honeycomb, a platform meticulously crafted for modern development teams that seek to extract valuable insights into application performance while improving log management efficiency. Honeycomb’s fast query capabilities allow you to reveal concealed issues within your system’s logs, metrics, and traces, employing interactive charts that deliver thorough examinations of raw data with high cardinality. By establishing Service Level Objectives (SLOs) that align with user priorities, you can minimize unnecessary alerts and concentrate on critical tasks. This streamlined approach not only reduces on-call duties but also accelerates code deployment, ultimately ensuring high levels of customer satisfaction. You can pinpoint the root causes of performance issues, optimize your code effectively, and gain a clear view of your production environment in impressive detail. Our SLOs provide timely alerts when customers face challenges, facilitating quick investigations into the underlying issues—all managed from a unified interface. Furthermore, the Query Builder allows for seamless data analysis, enabling you to visualize behavioral patterns for individual users and services, categorized by various dimensions for enriched analytical perspectives. This all-encompassing strategy guarantees that your team is equipped to proactively tackle performance obstacles while continuously enhancing the user experience, thus fostering greater engagement and loyalty. Ultimately, Honeycomb empowers your team to maintain a high-performance environment that is responsive to users' needs.

Development teams can leverage the Disbug Chrome extension to easily capture and document bugs with screen recordings, screenshots, console logs, and network activity, all of which can be uploaded to their project management system with a simple click! This innovative tool creates a visual account of the issue, enabling developers to see exactly what happened during the failure event. With just one click, the tool captures the complete context needed for bug reports, allowing teams to grasp the situation from various angles by recording the entire session. Furthermore, it gathers technical logs within your preferred platforms, complete with links to detailed information. This centralization within your issue trackers guarantees seamless integration with the tools you're already accustomed to using. When a bug is identified, tickets are automatically generated in the designated issue tracker, significantly speeding up the debugging workflow. This leads to enhanced clarity and eases the development process. Additionally, it has the potential to cut bug reporting time by as much as 60%, streamlining the workflow for QA testers, developers, and project managers, all for less than the price of a cup of coffee! By refining this procedure, teams can boost their productivity and devote more attention to delivering exceptional software solutions. Ultimately, this results in a more efficient development cycle and a higher-quality final product.

Kaption emerges as the leading analytics and feedback platform powered by artificial intelligence, specifically tailored for digital marketers. Acquire the essential insights needed to elevate your online presence and advance your business objectives. By eliminating uncertainty, you can gain clarity on user behavior and refine your strategies more swiftly. Understanding how users perceive your offerings is one of the most impactful ways to engage your audience. Have you thought about the navigation experience on your website? With Kaption, you can chart the user journey and pinpoint any hurdles they might encounter along the way. The road to success is built on reliable data; without it, your efforts may rely on chance or missteps. Focus your attention on efficient conversion tactics and monitoring techniques. Utilize complimentary heatmap analytics to scrutinize user interactions with every aspect of your site and how it influences their decisions. Identify where users struggle, enhance your conversion rates, and address product challenges more rapidly through insightful metadata analysis. By leveraging these tools, you can ensure that your marketing initiatives are not only well-informed but also highly effective, ultimately leading to sustained business growth.

You receive reports immediately, automatically enhanced with a plethora of important information, allowing you to tackle them fifty times faster. Users can easily report bugs by shaking their phone, which enables them to give feedback without leaving your app. When they shake their device, Shake is triggered, promoting effortless communication of their concerns. You have the ability to collect any necessary data from the user's device, and the .setMetadata() function simplifies the customization of this information to suit your debugging requirements. Furthermore, you can monitor user interaction within your app, log custom events using .log(), and keep an eye on all network activities prior to them submitting a bug report. The web dashboard provides you with the tools to filter and identify specific bugs, such as those reported from iPad Airs that were in landscape mode while offline. You'll receive immediate bug notifications in your team chat and can automate task creation directly in your chosen issue tracker. Shake is crafted to integrate effortlessly with the tools your team already employs, boosting productivity while ensuring that the bug reporting process is as effective as possible. This streamlined approach not only accelerates the resolution of problems but also greatly enhances the overall experience for users. With this system in place, teams can focus more on innovation rather than being bogged down by lengthy bug resolution processes.

Xdebug is a robust PHP extension that significantly improves the development process by offering a range of helpful tools and features. It enables developers to step through their code within integrated development environments as scripts are executed, simplifying the debugging process. The extension enhances the standard var_dump() function and provides detailed stack traces for notices, warnings, errors, and exceptions, clearly outlining the sequence leading to the problems. Furthermore, it records all function calls, including their arguments and locations, on the disk and can be customized to log every variable assignment and return value for functions. This comprehensive feature set allows developers, in conjunction with visualization tools, to meticulously analyze the performance of their PHP applications and pinpoint any performance issues. In addition, Xdebug highlights the portions of code executed during unit tests using PHPUnit, which helps improve test coverage. For ease of use, the fastest way to install Xdebug is often through a package manager by simply replacing the PHP version with the one currently in use. Alternatively, Xdebug can also be installed via PECL on both Linux and macOS, with Homebrew facilitating a smooth setup process. Overall, Xdebug greatly enhances the PHP development experience by delivering crucial debugging capabilities and performance analysis. Its extensive features make it an indispensable tool for developers looking to optimize their workflow and code quality.

If you've ever captured a screenshot or recorded your screen, you're likely acquainted with Jam. This tool automatically creates detailed bug reports that include all the vital information engineers need. It improves the bug reporting process in any platform you choose to use. You can share links to your bug reports or send them straight to your selected issue tracker with ease. Your colleagues can utilize this tool whether or not they have an account. Jam compiles everything necessary for engineers to accurately diagnose problems. We have removed the hassle of those tedious follow-up calls for additional context since all required information is conveniently available. With Jam, you receive impeccably formatted bug reports each time, reducing unnecessary communication. It integrates effortlessly with your preferred issue trackers and tools, making it as simple as taking a snapshot. Trusted by numerous teams across different organizations, you can report bugs in just seconds without disrupting your workflow. At present, Jam supports developers during both code reviews and testing by capturing essential diagnostic data and allowing for instant replay of the issue, which facilitates identifying what requires attention. This cutting-edge method not only saves valuable time but also fosters better collaboration among team members, ensuring everyone stays informed and aligned. By streamlining the bug reporting process, Jam empowers teams to focus more on solving problems rather than relaying information.

Polar Signals Cloud offers a seamless profiling solution that functions continuously without requiring any instrumentation, focusing on improving performance, understanding incidents, and minimizing infrastructure costs. By simply executing a single command and adhering to a user-friendly onboarding guide, users can quickly initiate savings and enhance performance for their infrastructure. The ability to examine historical incidents enables users to effectively track and resolve issues as they arise. The profiling data produced provides unique insights into process execution over time, allowing for confident identification of key optimization areas through statistical analysis. Numerous organizations discover that as much as 20-30% of their resources are wasted on inefficient coding paths that could be easily optimized. By employing an impressive blend of technologies, Polar Signals Cloud delivers a profiling toolkit tailored to the needs of contemporary infrastructure and applications. Its zero-instrumentation methodology allows for immediate implementation, facilitating access to actionable observability data that informs better decision-making. As organizations persist in utilizing this tool, they can continuously enhance their performance strategies and optimize resource utilization for long-term success. This ongoing refinement not only improves efficiency but also positions companies to adapt to future challenges in a rapidly evolving technological landscape.

Defang is a platform tailored for developers that aims to simplify the entire process of developing, deploying, and debugging cloud applications. By leveraging AI-powered tools, Defang allows developers to transform their innovative ideas into fully functional applications hosted on their preferred cloud services in no time. Supporting multiple programming languages, including Go, JavaScript, and Python, the platform provides users with the ability to kickstart their projects by using example templates or generating outlines through natural language prompts. With a single command, Defang efficiently automates the building and deployment processes, seamlessly handling configurations for computing, storage, load balancing, networking, logging, and security. The user experience is further enhanced through the Defang Command Line Interface (CLI), which offers various installation options such as shell scripts, Homebrew, Winget, Nix, or direct downloads. By allowing developers to define their services using compose.yaml files, Defang streamlines the deployment of applications to the cloud. This innovative platform not only cuts down on the intricacies typically involved in cloud application development but also opens the door for developers of all experience levels to engage with cloud technology more effectively. Furthermore, its user-friendly approach ensures that even newcomers to cloud development can quickly grasp the necessary tools and processes to succeed.

Latta AI represents a state-of-the-art platform focused on enhancing the software development process by automating the detection and correction of bugs. By recording user sessions and utilizing AI-driven approaches, Latta AI enables developers, project managers, and testers to focus their efforts on developing new features, significantly boosting productivity and expediting release schedules. The platform is engineered for seamless integration with popular version control systems like GitHub and GitLab, while also implementing strong security protocols to protect the integrity and confidentiality of code. Additionally, Latta AI offers a plugin specifically for JetBrains IDEs, allowing developers to access its bug-fixing tools directly within their development environment. This frictionless integration facilitates swift problem identification and resolution without the need to leave the IDE. Latta AI aims to reduce the time spent on debugging by up to 40%, thereby enhancing efficiency and allowing teams to emphasize innovation and creativity in their work. By alleviating the challenges associated with bug fixing, Latta AI is pivotal in reshaping the software development landscape, fostering a more agile and productive environment for developers. As a result, teams can allocate more resources towards exploring new ideas and enhancing their projects.

Instabug provides a platform for mobile application bug reporting and in-app user feedback. By facilitating smooth two-way communication between testers and users, it helps developers receive comprehensive environment reports upon SDK integration. This integration can be completed in under five minutes, yielding impressive results! Recognized by leading apps worldwide, Instabug is highly acclaimed for its efficient bug reporting and tracking capabilities. Additionally, we pride ourselves on delivering outstanding support around the clock, ensuring users have help whenever they need it. Users can rely on Instabug for an enhanced development experience.

Bugsee offers a comprehensive solution for diagnosing bugs and crashes in live applications by providing access to video recordings, network data, and logs that identify the sources of these issues, thus removing the necessity to recreate infrequent problems. This platform guarantees that all essential information is at your fingertips, allowing a clear understanding of what triggered unexpected behavior in your application. Users can analyze video footage that captures user interactions, backend exchanges, and system conditions linked to specific incidents. In addition, Bugsee delivers insights on frequent crashes and examines patterns influenced by device type, operating system version, and timing. You will receive in-depth details such as the precise filename, method, and line number where the crash took place, alongside the states of all other running threads during the event. Moreover, it records all HTTP and HTTPS requests and responses, including headers and content, related to your application, which allows you to synchronize console logs with the captured video and network activities for thorough analysis. This complete perspective on your application's performance not only facilitates quicker fixes but also improves overall reliability and user satisfaction. Ultimately, Bugsee empowers developers to maintain a higher standard of application performance.