Free Trojan Scanner and Removal Tool

Download Avast One to run a free trojan scan on your device. Prevent future attacks from trojans, viruses, and other types of malware. Plus, it's free and easy to use.

Download free trojan remover

Get it for Android, iOS, Mac

Install free trojan remover

Get it for PC, Mac, iOS

Install free protection

Get it for Mac, PC, Android

Download free trojan remover

Get it for iOS, Android, PC

2025
Top Rated
Product

2026
Product
of the Year

Powerful trojan scanner

Shop and bank securely

Trusted by over 400 million users

Award-winning protection

Avast’s best free trojan scanner and cleaner

Hidden trojan horse malware can compromise your data and slow your device. Disguised as harmless files, trojans wreak havoc on your system. Strong antivirus software can detect trojans before they do damage. Avast One is one of the fastest and most accurate trojan scanners available. Install it today, for free.

Download free trojan remover

Get it for Android, iOS, Mac

Install free trojan remover

Get it for PC, Mac, iOS

Install free protection

Get it for Mac, PC, Android

Download free trojan remover

Get it for iOS, Android, PC

The benefits of Avast’s trojan scanner and remover

24/7 updates

Virus definitions update in real-time, ensuring protection against new threats, enabling trojan virus removal.

Smart Scan

Deletes existing trojans and scans for hidden malware on your PC to defend against malicious threats.

Avast Assistant

Use the built-in AI assistant to double-check if an online message or offer is a scam.

Quarantine

Separates trojans and other malware from the rest of your operating system to keep your device safe.

Boot-time scan

Finds and isolates malware before your operating system mistakenly loads malicious files.

Block scam sites

Prevents malicious scripts from loading while you browse, and blocks dangerous websites.

24/7 updates

Virus definitions update in real-time, ensuring protection against new threats, enabling trojan virus removal.

Smart Scan

Deletes existing trojans and scans for hidden malware on your PC to defend against malicious threats.

Avast Assistant

Use the built-in AI assistant to double-check if an online message or offer is a scam.

Quarantine

Separates trojans and other malware from the rest of your operating system to keep your device safe.

Boot-time scan

Finds and isolates malware before your operating system mistakenly loads malicious files.

Block scam sites

Prevents malicious scripts from loading while you browse, and blocks dangerous websites.

Stay safe with award-winning trojan protection

Leading independent reviewers agree: Avast’s cybersecurity protection is among the best in the world. Avast One is powered by the same world-class antivirus engine that’s been bringing home top awards for years.

Performance Test 2025 AV-Comparatives: Advanced +

Home User Protection Test 2025 AV Test: Top Rated Product

Advanced In-the-Wild Malware Test 2025 AVLab: Product of the Year

VB100 2024 Virus Bulletin: A+

Advanced Threat Protection Test 2024 AV-Test: Advanced

A trojan scanner trusted by over 400 million users

But don’t just take our word for it.

The UI for your software - amazing. Great work over the years. Can't say enough good things!

Ryan R.

Thank you, Avast, for the excellent work you do. I run your antivirus software on both my Mac OS X and my Windows machines. You have the best products on the market, period.

Eric S.

I’ve been using Avast for over a year and have found it one of the best free software protection devices on market.

Daryl C.

Get rid of trojans on your Mac or mobile, too

Every device needs trojan protection, not just Windows PCs. We’ll help you keep your Mac and mobiles free of trojan malware.

MAC

Android

IPHONE/IPAD

Avast offers quick, powerful scans against trojans and other malware that target your Mac. Our top-performing antivirus for Mac will keep your machine safe from online threats for free.

Don’t forget about protecting your Android phone and tablet. Avast’s free antivirus tool for Android eliminates trojans and other malware threats while keeping your Wi-Fi connection secure.

iPhones and iPads are also susceptible to malware. Secure your iOS devices against online threats with a powerful iOS security app. Prevent trojans, block viruses and other malware, and surf online securely with Avast.

Download our free trojan scanner and remover

Looking for the best way to protect yourself against trojans? You found it. And at the best possible price — free.

Download free trojan remover

Get it for Android, iOS, Mac

Install free trojan remover

Get it for PC, Mac, iOS

Install free protection

Get it for Mac, PC, Android

Download free trojan remover

Get it for iOS, Android, PC

FAQs

How can I get rid of a trojan?

The easiest way to get rid of a trojan is to download a strong antivirus tool that can target trojan removal. But if you want to learn how to identify and remove a trojan (or any type of malware) from a specific device, we’ve got you covered too:

Can a Mac or mobile device get trojans, too?

Yes. Any device you connect to the internet is at risk of trojan infection. Mac attacks have been growing over the past few years. And while Android devices are more at risk than iPhones and iPads, iOS devices are still vulnerable to a variety of security threats.

Is Windows Defender enough to protect my PC?

Windows Defender lacks many essential features that other free antiviruses offer, and it sometimes even blocks clean files that you can trust. For the best results, use a free trojan scanner and remover like Avast One.

What are trojans and how do they spread?

A trojan is a type of malware that gets into your computer much like its ancient Greek namesake. It disguises itself as something friendly or desirable, then sneaks into your device when you finish your download. Trojans can be attached to emails, posted on file-sharing sites, or found in illicit Dark Web storefronts.

What are the signs of spyware infection?

Like most other malware, signs of a trojan infection can be very well hidden. But you can watch out for frequent crashes, changes to your browser or desktop layout, and excessive pop-ups.

Is a trojan horse a virus?

No. Viruses are designed to replicate and spread within a network, but trojans don’t replicate. A trojan horse is a type of malware that looks like a legitimate program or app, and relies on social engineering to trick you into installing a fake app containing malware. Trojans and other malware (like worms) aren’t viruses, but can be just as destructive.

Other tools

Helpful links

System requirements

All devices require an internet connection for automatic security and program updates.

PC with Windows 11, 10, 8.1, 8, or 7 (both the 32 and 64-bit versions, excluding Starter and RT editions), 1 GB RAM and 2 GB of hard disk space, ARM chips Windows 11 only.

Mac running macOS 10.14 (Mojave) or later, 64-bit Intel or ARM processor, and 1 GB of free disk space.

Windows 10 compatible

Free Trojan Scanner and Removal Tool

Avast’s best free trojan scanner and cleaner

Avast’s best free trojan scanner and cleaner

The benefits of Avast’s trojan scanner and remover

Stay safe with award-winning trojan protection

A trojan scanner trusted by over 400 million users

Ryan R.

Eric S.

Daryl C.

Get rid of trojans on your Mac or mobile, too

Download our free trojan scanner and remover

FAQs

How can I get rid of a trojan?

Can a Mac or mobile device get trojans, too?

Is Windows Defender enough to protect my PC?

What are trojans and how do they spread?

What are the signs of spyware infection?

Is a trojan horse a virus?

Other tools

Helpful links

System requirements

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