Hi everyone,

Recently we've been getting a spike of inquiries for FREE filters. I'm starting this thread to address this issue and I hope others can chime in as well.

Just to clarify, if there's any way you can get a paid filter, please do it. You won't regret it. However, there are times when people who need filters most, like young bochurim, cannot get it because they don't have a credit card, and their parents are unwilling to sponsor it.

(GYE has a form where you can request a sponsored Netspark filter at https://guardyoureyes.com/protection. However, as for various reasons, it's not working smoothly yet. Also, some devices are not supported.)

The free filters that will be mentioned below are not fool proof. They can be easily disabled, don't do a great job at filtering, and can be bypassed. However, they are better than nothing if you combine them with with urge management skills, because at least you won't visit inappropriate sites accidentally or out of pure habit. You can read about Urge Management techniques at https://guardyoureyes.com/forum/54-SMART-Recovery/346935. For example, you can commit not disable the filter, or to only use browse in a public part of your home.

That said, here are some suggestions:

Chrome Skin Color Filtering - https://chrome.google.com/webstore/detail/skin-filter/digkbjcglmbbipijiogdeegbfbepgdon?hl=en

TAG Image Filter
https://chrome.google.com/webstore/detail/tag-image-filter/pjdabogckbepcemfdiigdkncfekikpki?hl=en

Website Blocker for Chrome
https://chrome.google.com/webstore/detail/block-site-website-blocke/eiimnmioipafcokbfikbljfdeojpcgbh?hl=en   
See also https://blocksite.co/

OpenDNS
https://www.opendns.com/home-internet-security/
This can filter is very easy to setup, however, sometimes for mysterious reasons the setup process don't not work as expected. However, it's worth a try. Once you get it working, it does a decent job.

AdBlock
https://chrome.google.com/webstore/detail/adblock-%E2%80%94-best-ad-blocker/gighmmpiobklfepjocnamgkkbiglidom

Ad Block for YouTube
https://chrome.google.com/webstore/detail/adblock-for-youtube/cmedhionkhpnakcndndgjdbohmhepckk?hl=en

Blocksi Web Filter
https://chrome.google.com/webstore/detail/blocksi-web-filter/pgmjaihnmedpcdkjcgigocogcbffgkbn

WebFilter FREE: Parental Control & Anti-Porn
https://chrome.google.com/webstore/detail/webfilter-free-parental-c/epniipcfpbjliciholgdeipceecgcfmj?hl=en

Parental Controls for iOS
If you have an iPhone or iPad, you can use parental controls to setup an adult content filter, or even a whitelist. See here for more info https://support.apple.com/en-us/HT201304. To make this solution better, ask someone else to set the password.

Pluckeye
https://www.pluckeye.net/
An advanced filter, but difficult to set up.

Has anyone tried the free version of https://www.kaspersky.co.uk/safe-kids?

Check out filters.pluckeye.net for a list of filters besides their own.

As an alternative to OpenDNS, check out Cleanbrowsing.org as it by default filters much better than OpenDNS. However if you need to customize it, you need to pay, versus OpenDNS allows some free customization.

Hatzlocha

Pluckeye right out of the box will block all images, but can be a bit tricky if you want to customize it more. It is however not free, just an honor system. That is something that all of us holy Yidden have of course.

For Android devices, even if you are an adult, Google family link can be helpful. Here is how to use it for yourself:
1. Create a google account with a randomly generated password that you will not have access to or be able to memorize. Print out the password and keep it somewhere where you don't normally go. Keep the sheet with the password by you because you'll need to use it in a second.

2. Install SPIN Safe browser from the Play store (play.google.com/store/apps/details?id=com.nationaledtech.spinbrowser)

3. (The most annoying step) Go to the play store, click the hamburger menu, my apps and games, library. This is all the apps you've ever installed. Download all of the apps that you will want to block in the future ESPECIALLY including all unfiltered browsers.

4. On your phone go to settings (little gear icon in drag down screen), then digital wellbeing and parental controls
Then click on whichever option has parental controls, and click to set it up. When it asks for a parent account, use the one you made last step. It will give you the option to block apps. Block chrome especially (their filtering thing doesn't work), and all the other apps you don't want like YouTube. Make sure it's set to ask "parent's" permission to install all apps. Also put on blocking of OK google or filtering for that. Be warned that you will only be able to use the Google account of the account you designated as "child". If you have a school account (like .edu) you can add that from FamilyLink under "add school account" which will also require the parent account.
Then you're done. No muss no fuss. Your only browser will be SPIN which is safe and as long as you put that piece of paper somewhere far or in the posession of someone else you'll be well protected. Just make sure you don't skip any of these steps because there might be some problems. This is all free and can't be bypassed. Hope this is useful.

Pluckeye can be installed for free if you are OK with taking a short survey every 3 months. the survey took me 2 minutes? or something like that. THANK YOU!!!! for mentioning this filter, it was exactly what I wanted! It can shut off my internet for a block of time. As an added bonus, it also blocks images (I can allow images if I want). 
This is all self controlled - which is how all of my filters the past 6 years have been. The reason it's effective is because there's a delay in the time it takes to change the settings. I will probably make that delay 12 hours. For now, it'll be 2 hours (until I finish configuring the settings). Any change that will give me more access will only take effect after two hours.

The only downside is that it is not very user friendly. But if you want to block all images, it should be just fine.

ETA: 2 hours has been effective enough. 

Eyes, Eye saw you asked, so fyi - TAG can lock an iPhone / iPad for you at minimal or no charge. 

Also your wife can set a restrictions code to block whatever you need. 

Plucky has put together a guide for locking down your Android device, which you can find HERE.

I have tried kaspersky kids was pretty horrible though I don't remember the details. I then switched to techloq which was lousy but still an improvment now BH I have Netfree.