Onion Browser

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Enhance your web privacy

Onion Browser is a free and open-source web browser for iPhone and iPad that encrypts and tunnels web traffic through the Tor network, with extra features to help you browse the internet privately. See more features & benefits.

• Onion Browser is recommended by Tactical Technology Collective and ProPublica’s Guide to Safer Communication.
• Featured in Ars Technica, The New York Times, Salon, TechCrunch, Boing Boing, Gizmodo, Lifehacker, The Guardian, Cult of Mac, and others.
• Read about Onion Browser on the Tor Project site and on the official Tor Project blog.

Latest news:

• Please consider supporting ongoing development by becoming a Patreon supporter, by using the in-app purchase, or by sending a one-off payment.

• April 2019: Onion Browser 2.2.0 upgrades Tor to 0.3.5.8, greatly improves reliability when the app comes back from background, and contains more fixes and UI tweaks. Localizations are now available in Turkish, and localizations for most languages have been updated. Users are encouraged to update via App Store.

• September 9, 2018: Just posted an update on Patreon about the current state of Onion Browser.

• February 9, 2018: Onion Browser 2.0.3 disables WebRTC if the "Content Policy" setting is set to "Strict" or "No XHR/WebSocket…". WebRTC is known to leak a user's true IP address for Onion Browser users using iOS 11.0 through iOS 11.2.

• December 2016: New Price! Onion Browser is now free. Read more about it here. If you'd like to support continuing development of Onion Browser and other Tor iOS projects, please consider backing the project on Patreon or donate via one of the other options.

  You can read coverage about the price change in Ars Technica, and read about the State of iOS Tor on the official Tor Project blog.

Download

This app available for free in the Apple App Store. Click here to download.

Note: Onion Browser is not available in China due local regulations preventing the distribution of Tor apps in the App Store.

Copies of Onion Browser downloaded outside the App Store — via app directories like Cydia or other "jailbreak" app directories — are not created by the developer of Onion Browser. These copies may have modifications added by the packager, which may interfere with your privacy or security, or they may secretly contain malware. We cannot provide support for copies of Onion Browser acquired through these channels.

Source Code

Onion Browser is open source software so that others may audit/inspect the code and help contribute to the project. You may freely access the source code on GitHub; see license for terms of use and disclaimers.

Donate To Support Onion Browser

Onion Browser is a free app! You can support continuing development of Onion Browser in a few ways:

• Send a one-off payment using PayPal, using the "Support Onion Browser" box to the right.
• Back the project on Patreon. Users who back the project at the $5 tier can (optionally) appear in the app's credits as a way of thanks. Users who back the project at the $10 tier can receive an invite to test upcoming versions of Onion Browser.
• Venmo: mtigas
• Send a one-off payment in the app (as of v1.7.6) — see "Help Fund Onion Browser" in the main menu.
• Sending Bitcoin: (You can also back the project with Bitcoin on BitPatron)

  15KxYFRuwWUTXzWjPvJEDrDCZuf76LjrgR

• Sending Ethereum:

  0xF185CfbD064bF8e0d365Ec412675F10151F5c908

• Sending Zcash (secure z-addr):

  zs1hv9ux5erpemkcv3rq5e38m5ehhs3jrm7k07a2pkvckynej9hmwg8n0wd6ef7fq2ymar5jjdp924

• Sending Zcash (public t-addr):

  t1PieY328RVM13BDFhSK7AbZVegcXP4tfND

• Other financial support: Get in touch below.

Want to financially support the project another way? Want to use another cryptocurrency, or send to a non-public address? Please get in touch.

Features & Benefits

• Internet access is tunneled through the Tor network[1][2]
  • Websites do not see your real IP address.
  • ISPs and insecure wireless networks cannot see your browsing.
  • Access websites, even behind some types of internet filters and censors.
  • View .onion websites: the "dark net" of hidden sites only accessible using Tor.
• Fight online tracking: use a new IP address and clear your cookies/history/cache by pressing one button.
• Block third party cookies or all cookies.
• Ability to change cookie storage policy (Allow All / Block Third Party / Block All)
• Disable scripts and multimedia content that can be used to track you.
• Can send the "Do Not Track" HTTP header (DNT: 1) to websites.

Bugs, Caveats, Side Notes

See the release history for a log of Onion Browser release notes, including previous security issues and results of previous security audits. See the Github project for a current list of known issues.

Using Onion Browser does not inherently guarantee security or privacy. It simply provides a set of features that may enhance privacy and anonymity while browsing the web. For more information: The Tor Project maintains a small section about staying anonymous over Tor, as do several threads on Reddit and other messageboard sites.

• Disclaimer: Onion Browser only tunnels traffic within the Onion Browser app. You are still using a smartphone you should be aware that information outside of Onion Browser will continue to use your normal connection.
• Video note: Websites using HTML5 <video> tags may leak <video>-related DNS queries and data transfer outside of Tor. This includes YouTube, Vimeo, and any website using iOS-compatible HTML5 video. This is due to behavior of the embedded QuickTime player and a comprehensive workaround has not yet been developed.
• JavaScript blocking: The "Active Content Blocking" feature is experimental. If ACB is turned off, JavaScript techniques can identify what type of iOS device you are using and what version of iOS you are using, even if User-Agent Spoofing is enabled.
• Geolocation blocking: Websites may use the HTML5 Geolocation API unless the "Active Content Blocking" feature is set to "Block All". Users should remain vigilant for any pop-ups asking for permission to access location data.
• Common Sense: If you log into websites in Onion Browser that you normally log into outside of the Tor network, they will a) still know who you are, and b) know that you use Tor. In certain circumstances (i.e. political dissent in repressive nations), this may be incriminating information in itself.

Copyright & Legal

Onion Browser is copyright © 2012-2018 Tigas Ventures, LLC. All rights reserved. "Onion Browser" and the Onion Browser logo are trademarks of Tigas Ventures, LLC. Onion Browser 1.X is distributed under terms of the Mozilla Public License 2.0 (MPL); Onion Browser 2.X is distributed under the Endless / Onion Browser License (OBL).

Onion Browser is not affiliated with nor endorsed by the Tor Project. Onion Browser carries no guarantee from The Tor Project about quality, suitability or anything else. "Tor" is a registered trademark of The Tor Project, Inc.

This software uses strong cryptography and may it fall under certain export/import and/or use restrictions in some other parts of the world. BEFORE using any encryption software, please check your country's laws, regulations and policies concerning the import, possession, or use, and re-export of encryption software, to see if this is permitted. See http://www.wassenaar.org for more information.

Any use of the app is subject to the MPL or OBL (depending on your version of Onion Browser; see above), any applicable Apple Terms of Use or End User License Agreement, and any other applicable third-party licenses (as included in the app credits). Onion Browser is provided as-is and use of the app is at your own risk; see the MPL or OBL for full disclaimer of warranty.

If you are a developer and plan on redistributing this app in source or binary form, please see read the LICENSE file (1.X; 2.X) for full license details and legal obligations.

Privacy Policy & Privacy Notices

Onion Browser does not directly collect any data on user activity. Other than what is built into iOS, Onion Browser does not utilize any third party analytics.

Information on iOS data collection (App Store account info, opt-in analytics, etc), and its privacy policy (and full legal compliance information), can be found here: https://www.apple.com/legal/privacy/en-ww/

In particular, analytics data collection is opt-in (Settings->Privacy->Analytics in iOS) and is aggregated and anonymized using differential privacy techniques to make it difficult or impossible to extract an individual user’s information from the aggregated data. https://images.apple.com/privacy/docs/Differential_Privacy_Overview.pdf

Apple only makes this data available in aggregate and the Onion Browser developers do not have access to an individual user’s information. For examples of the aggregate data made available, see: https://developer.apple.com/app-store/app-analytics/