Open Source Browsers & Extensions Tools
A curated collection of the best free and open source
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Ladybird
Independent web browser built on a new engine written from scratch, currently pre-alpha and suitable only for developers.
Open Source Alternative to:
Google Chrome
An independent browser engine built from scratch, not a fork
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66,053Forks
3,150Last commit
5 days ago
Zen Browser
A Firefox-based browser built around workspaces, split view and a compact interface, aimed at people who keep too many tabs open.
Open Source Alternative to:Google Chrome
Privacy-focused browser with powerful customization
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Ad
Brave
The Chromium-based browser with a Rust ad blocking engine built in, for people who want blocking without installing an extension.
Open Source Alternative to:Google Chrome
Fast, private browser that puts you first
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23,575
Screenity
Chrome extension for unlimited screen recording and annotation, made for people who want demos and tutorials without an account.
Open Source Alternative to:
Loom
Free, private screen recording for Chrome
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18,665
Harper
An English grammar checker that runs entirely on your machine, built for writers and developers who want suggestions without a cloud round trip.
Open Source Alternative to:
Grammarly
Fast grammar checking that respects your privacy
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14,994
Waterfox
A customisable Firefox based browser with data collection disabled, built in ad blocking and private DNS for privacy minded users.
Open Source Alternative to:Google Chrome
Firefox fork with telemetry off and ad blocking built in
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LanguageTool
An open source proofreading engine for more than 25 languages, for writers and developers who want checking on a server they control.
Open Source Alternative to:Grammarly
AI-powered grammar checker for 30+ languages
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14,986
Requestly
A Git-native desktop API client for designing, testing and sharing HTTP requests, with local, team-synced or self-hosted storage.
Open Source Alternative to:
Postman
Intercept, modify, and debug HTTP(S) requests effortlessly
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6,758
Deta Surf
Local-first AI notebook and browser that keeps files, web pages and notes in one place so research and writing happen side by side.
Open Source Alternative to:
NotebookLM
Browser and notebook combined with local-first AI
Zen
System-wide ad and tracker blocker for Windows, macOS and Linux that filters traffic from every application, not just the browser.
Open Source Alternative to:
AdGuard
System-wide ad-blocking and privacy protection, no extensions needed
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4,219
Browser Operator
A desktop AI browser that runs multi-agent research, comparison and automation locally, using whichever model provider you configure yourself.
Open Source Alternative to:
Dia
Open-source AI browser for intelligent web automation
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Flow
Chrome extensions, profiles, spaces, and a native ad blocker in an Electron browser for people who keep dozens of tabs organized.
Open Source Alternative to:Google Chrome
Fast, secure browsing with powerful organization features
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1,072
Linguist
Translate pages, selected text, subtitles, and messages across 130 languages, offline on your device or through any translation backend you choose.
Open Source Alternative to:
DeepL
Privacy-focused translation with offline capabilities
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1,060
Midori Browser
Privacy oriented desktop browser based on the Gecko engine, with workspaces and Firefox extension support, for Linux, macOS and Windows.
Open Source Alternative to:Google Chrome
Fast, secure, and privacy-focused web browsing
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Cloudmark
A no-registration cloud bookmark manager that saves links behind a collection ID and a write token, for people who want portable bookmarks.
Open Source Alternative to:
Raindrop.io
Organize and access your bookmarks seamlessly in the cloud
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