Best Browser DevTools in 2026

Dia is a specialized browser engineered to optimize professional workflows by intelligently organizing information and proactively suggesting relevant content. It acts as a central hub, integrating with various work tools like GSuite, Slack, Notion, and GitHub to provide a unified view of tasks and information. Dia aims to reduce context switching and information overload, allowing users to concentrate on deep work. The browser features include a "Morning Brief" for daily overviews, "Proactive Suggestions" that surface next steps, and an AI-powered search that answers questions by analyzing context across connected applications. It also offers features for better meeting preparation, distinct work and personal profiles, and advanced tab management. Dia prioritizes user privacy with local data storage, end-to-end encryption for synced data, and strict controls over data sharing for product improvement.

Comet is Perplexity's AI-powered web browser. It builds Perplexity's answer engine directly into the browser, letting you ask questions about any page, summarize articles, and use an AI assistant that can take actions across your tabs. It is positioned as an agentic browser that completes tasks, not just one that displays pages.

SigmaOS is a fresh take on the web browser, designed to enhance productivity and reduce digital clutter. It introduces a unique workspace-based organization system, treating tabs like tasks that can be marked as done or locked. The browser features vertical tabs for better overview, split-screen multitasking, and an integrated ad blocker for a cleaner browsing experience. Beyond organization, SigmaOS incorporates advanced AI capabilities through its companion, Airis. Airis can understand the context of the website you're on to answer questions, explain paragraphs, and even conduct internet searches to provide a starting point for research. It also offers a 'Simplify' feature to distill web pages into interactive summaries, aiming to create a more peaceful and focused internet environment. SigmaOS is ideal for users seeking a more structured, efficient, and intelligent way to interact with the web.

Requestly is an open-source, lightweight API client and web proxy designed for modern developers to build, test, and debug APIs efficiently. It offers both a browser extension for instant, in-browser functionality and a more powerful desktop application for Mac (with other platforms implied) to handle web, mobile, and desktop app API interactions. Beyond just an API client, Requestly functions as a robust HTTP interceptor and web debugger. It allows developers to intercept and modify network requests, headers, and API responses in real-time. This includes injecting custom scripts (JavaScript/CSS), mocking API responses to build frontends without a backend, simulating edge cases, and redirecting requests. It aims to streamline development workflows by providing a comprehensive tool for API development, testing, and debugging, reducing the need to juggle multiple tools. Requestly also emphasizes collaboration and enterprise-readiness with features like team workspaces, Git synchronization for API collections, role-based access control, and robust security measures including SOC-II compliance, SSO, and data encryption. It positions itself as a powerful, open-source alternative to more 'bloated' closed-source solutions, offering a fast, flexible, and secure environment for API development and debugging.

Agent Browser enables AI agents to navigate, click, type, and interact with real web browsers using ASCII wireframes, a text-based representation where interactive elements are numbered for efficient token usage. Instead of processing heavy screenshots, AI models receive structured wireframes that maintain semantic clarity while minimizing cost and latency. Built on Playwright, it integrates with MCP clients (Claude Desktop, Cursor), the Vercel AI SDK, and offers an interactive CLI for manual testing.

WizzyPoke is a Chrome extension that allows users to send "nudges" to their friends, reminiscent of the classic MSN Messenger feature. These nudges shake the recipient's screen, aiming to get their attention when messages might go unnoticed. It's designed for personal use to add a fun and immediate way to communicate. The tool works across popular web applications like WhatsApp Web, YouTube, and Netflix. It prioritizes privacy by using unique 6-digit codes for pairing friends instead of phone numbers. WizzyPoke is ideal for individuals looking for a playful and effective way to get a friend's attention online, especially when text messages aren't cutting through the noise. Key benefits include instant delivery of nudges, easy friend pairing, and the ability to make communication more engaging. It offers a free tier for basic use and a one-time purchase for unlimited nudges and broader web app support.

ADB Wrench is a browser-based tool designed to simplify Android debugging. It allows developers to connect to Android devices directly from their web browser, eliminating the need for local ADB installations or complex command-line interfaces. This makes it easier to inspect device state, install/uninstall apps, pull/push files, and execute shell commands. The tool is ideal for Android developers, QA engineers, and anyone who needs to interact with Android devices for development, testing, or troubleshooting. Its browser-based nature enhances accessibility and collaboration, as it can be used from any machine with a web browser without environment setup. Key benefits include increased productivity, reduced setup time, and a more streamlined debugging workflow.

KanjiLens is a browser extension designed to help Japanese learners master kanji through immersion. It allows users to read their favorite manga and novels online, providing instant kanji lookup by hovering over any character to see its reading and meaning. This eliminates the need to break reading flow for dictionary lookups. The tool also features one-click image translation, utilizing OCR technology to seamlessly translate text within manga panels and other images, making raw Japanese content more accessible. An integrated Spaced Repetition System (SRS) allows users to save new words to personalized flashcard decks, aiding long-term memory retention. Additional features include right-click scanning, custom mnemonics, and customizable settings, making it ideal for anyone looking to learn Japanese by engaging with native content.

StealthHound is a Chrome extension designed to protect user privacy by detecting and blocking advanced tracking techniques like browser fingerprinting. Unlike traditional ad blockers or VPNs, it specifically targets invisible tracking methods that websites use to identify devices even without cookies or logins. It provides real-time risk signals, live alerts for hidden tracking attempts, and automatically blocks invasive techniques. This tool is ideal for anyone who wants greater clarity and control over their online privacy, from everyday users to developers and privacy-conscious professionals. It operates locally within the browser, ensuring no browsing history collection, user tracking, or data selling, making it a privacy-first solution. StealthHound aims to make hidden tracking visible and controllable, empowering users to understand and prevent how websites behave.

Edge Light is a browser extension that applies professional virtual ring light effects to video calls without requiring physical lighting hardware. It creates a soft, adjustable glow on the browser tab to keep faces well-lit during video conferences on Zoom, Google Meet, Microsoft Teams, and other web-based platforms. All lighting effects are processed locally in the browser with no data uploads, ensuring complete privacy. Available for Chrome, Edge, Brave, and Firefox.