How to Fix “Comment failed to post” on YouTube?

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Written by: Alex Popa


How to Fix “Comment failed to post” on YouTube?

Did you get the “Comment failed to post” error on YouTube?

It’s a common error that bothers many people and has several causes.

The error can appear on a computer and a mobile device, but it often seems on computers.

Keep reading if you’re in a hurry and need to post a comment on a YouTube video!

This guide will teach you how to fix the “Comment failed to post” error on YouTube.

We also have a secondary solution that’ll let you post comments on YouTube if none of the solutions in the guide work.

Keep reading to find out more!

Why is the “Comment failed to post” error appearing on YouTube?

The “Comment failed to post” error can appear for a variety of reasons, including:

  1. Malfunctioning VPN
  2. Anti-spam policies
  3. Buggy browser
  4. Auto-generated YouTube username
  5. Corrupt cookies
  6. Interfering extensions (AdBlock)

In this guide, you’ll learn how to deal with the “Comment failed to post” error by solving all these issues.

Related guide: What Does “Join” Mean on YouTube?
Related guide: How to See When You Subscribed to a YouTube Channel
Related guide: How to Premiere a Video on YouTube

How to Fix “Comment failed to post” on YouTube?

One of them is causing the problem, and we’ll help you diagnose them.

All in all, the “Comment failed to post” error is a common Glitch on YouTube.

For instance, if you pause on an ad on YouTube, the error might appear and not let you comment on the video.

So far, YouTube hasn’t released any update that fixes this issue. It’s been around for years, no less.

The YouTube algorithm works in mysterious ways and might red-flag you as a bot for weird behavior.

How Can You Fix “Comment Failed to post” on YouTube?

There are several things you can try to fix this error:

  • Disable your VPN

Are you using a VPN app to anonymize your activities on the internet?

Then this might be the problem, especially in the case of mobile devices.

To fix it, deactivate your VPN connection and see if you can post comments on YouTube.

If you’re on a computer, your VPN app will be in the “Hidden Icons”.

Disable your VPN
Disable your VPN

Click on the arrow icon, and your hidden icons will appear.

If the VPN is activated, that’s where you’ll find it. 

Open it and look for the “Connect” button. Click on it to disconnect from the server.

Then, try commenting on YouTube. If the VPN was causing the issue, you should be able to post comments on YouTube now.

The process is similar if you’re on a mobile phone and using a VPN.

Look for your VPN app in the app list, open it, and deactivate it by tapping on the “Disconnect” button.


Then, return to YouTube and see if you can post comments this time.

If not, then move on to other solutions!

  • Use another internet browser

This often happens on computers, but mobile users could also experience this problem.

Sometimes, the internet browser becomes buggy and doesn’t work properly.

For a quick fix, you can use another browser if you’re in a hurry to comment on YouTube.

On mobile phones, this is quite easy because every phone has an in-built browser.

If you were using Google Chrome before, switch to the in-built browser, and the problem should be fixed.

If you’re on a computer, the solution is very similar. All operating systems come with pre-installed internet browsers.

Remember the old Internet Explorer? It’s still around if you want to use it. Microsoft Edge is also available.

To find them, use your Windows search bar.

Look for “Microsoft Edge” or “Internet Explorer”, open them, and visit the YouTube video you had problems with.

If you’re on a mobile phone, you could already be using your in-built browser because you hadn’t bothered to download another browser.

To diagnose this issue, you should download Google Chrome and try commenting on YouTube from it.

You can find Google Chrome on Google Apps or Play Apps.

Google Chrome on Google Apps or Play Apps
Google Chrome on Google Apps or Play Apps

Download the browser, open it, and visit the YouTube video from before.

Another solution might work if the “Comment failed to post” error still appears.

  • Let the video play a bit before commenting.

YouTube is a strange place, and the YouTube algorithm does weird things.

Sometimes, the platform doesn’t let you comment because you haven’t played the video.

It thinks you’re a bot, and you’re spamming. If you think about it if you haven’t watched the video at all, what are you commenting about?

It does seem a bit off, but you can avoid this by playing the video in the background.

Let it run like that, and post your comment. Some users reported that this solved their problem.

You can still try this method even if the video has no ad.

Alternatively, you can skip the video to the end and then try to post your comment.

If this doesn’t work, they move on to other solutions

  • Clear your cookies and cache

This can be done both on a computer and mobile phone.

Sometimes, the browser has corrupted cookies, and the cache is full, interfering with the normal functioning of YouTube.

To solve it, clear the cookies and cache. You can do this on a computer and a mobile device.

For Computer

Clear your cookies and cache
Clear your cookies and cache

To clear the cookies and cache on a computer browser, click on the three-dot menu in the top-right corner.

Then, select “More Tools” and click “Clear browsing data”.

This will open a new window.

Clear browsing data
Clear browsing data

This is where you can clear the browsing data, including your cookies and cache.

In the “Time range” field, select “All time”, and then check the “Cookies and other site data” and “Cached images and files” options.

This will delete cookies and the cache and sign you off from all your accounts, including YouTube.

Then, click on “Clear data” to finish the process.

For mobile devices

If you’re on a mobile, you can clear the cache of Google Chrome but not the cookies.

However, cookies aren’t very usable on mobile phones, so they’re not an issue.

To clear the cache on a mobile device, go to Settings – Apps – Manage Apps – Google Chrome – Clear cache.


The first thing you have to do is find the “Apps” in your Settings.

You may have to scroll down to find the option, though.

After you tap on it, you’ll get taken to a new menu with several options.

Manage apps
Manage apps

Depending on your device, you may have to select “Manage Apps” or “App List” or “Applications” to get to your app list.

Then, when you get to the app list, you’ll need to find Google Chrome.

We recommend using the search box at the top to avoid wasting time. Type in “Google Chrome,” and the search engine will find it.

Google Chrome
Google Chrome

Tap on it when you find it to get to the Chrome settings.

The “App Info” window should be identical on all mobile devices.

Clear data
Clear data

That’s where you can clear the cache files for Google Chrome.

Look at the bottom of the window, and you’ll see the “Clear data” button.

It’s next to the “Force Stop” and “Uninstall updates” buttons.

Tap on “Clear data” and select “Clear cache” from the pop-up window.

Clear cache
Clear cache

Once you select “Clear cache”, Google Chrome will reset all its settings, and the cache will be deleted.

So, if any corrupted files were causing the “Comment failed to post” error on YouTube, it should be gone by now.

If the error is still popping up, the cache and cookies weren’t the problems.

Move on to other solutions:

  • Disable AdBlock

Ads are very annoying; we can agree on that. And there are extensions to help you deal with them.

One of them is AdBlock. Sometimes, AdBlock causes unforeseen problems with the internet browser or certain websites.

Many users say disabling AdBlock solves the “Comment failed to post” error on YouTube.

Either you disable it or whitelist YouTube in the AdBlock extension.

This problem with AdBlock most often happens on computers and less often on mobile devices.

To disable AdBlock on your computer, you must go to the Extensions tab.

To do this, click on the three-dot icon to open the menu, then select More Tools – Extensions.

Disable AdBlock
Disable AdBlock

This will open the Extensions tab, where you’ll see all the installed extensions on your browser.

Extensions tab
Extensions tab

Find AdBlock (or, in your case, uBlock Origin) and deactivate it.

Every extension will have a toggle button in its extension box. 

If the extension is activated, the toggle button will be blue.

Click on it to turn it grey and thus deactivate the extension.

After deactivating the extension, reload the YouTube page and see if the error appears again.

  • Skip the ad

If the YouTube video you’re trying to comment on has an ad, in the beginning, skip it.

Even though most people do this, you might be part of the 1% who don’t do that.

If you don’t skip the ad, YouTube might red-flag you as a bot because bots aren’t able to do that.

If your ad is paused, the “Comment failed to post” error might appear.

Many users report skipping the ad will make the error disappear, and you can post the comment without a problem.

Don’t try to comment while the YouTube video is playing an ad.

Most importantly, don’t pause the ad and try to comment. That’s when YouTube’s algorithm might stop you because it thinks you want to spam.

  • Use the mobile YouTube app to post a comment.

If the “Comment failed to post” error appears on your computer, why don’t you use YouTube on mobile to post the comment?

Remember the video or copy the link, send it to a friend on WhatsApp, then access it with your mobile phone.

Use the mobile YouTube app to post the comment
Use the mobile YouTube app to post a comment.

Open YouTube on your mobile phone, navigate to the YouTube video you want to comment on, and say your piece!

Most times, the error only appears on YouTube on your computer, but the YouTube app on the mobile works flawlessly.

If this still doesn’t work, we have one final solution for you.

  • Use YouTube Studio

You have one last solution if YouTube doesn’t work for you on the computer or mobile phone.

Use YouTube Studio on your mobile phone. It’s a dedicated app you can download on Google Play or Play Store.

You can even reply to comments on YouTube studio instead of using the regular YouTube app.

Many users report that using YouTube studio temporarily fixes the “Comment failed to post” error on YouTube.

First, you need to download it.

Use YouTube Studio
Use YouTube Studio

Search for “YouTube” studio and then tap on “Install.” After installing it, open it on your mobile device.

You may have to log in to it, but if you’re already logged into your account on YouTube, YouTube Studio will already be logged in.

After you open the app, you’ll land on the Dashboard, where you can see your channel’s stats.

YouTube Studio Dashboard
YouTube Studio Dashboard

To reply to a comment, tap on “Comments” on the bar at the bottom of the screen.

It’s right beside “Playlists” and “Analytics”.

After you tap on it, you’ll open the Comments section of YouTube Studio.

Comments section of YouTube Studio
The comments section of YouTube Studio

Remember that only the comments related to your channel/videos will appear here.

If you haven’t posted any videos and your YouTube channel is non-existent, you won’t see any comments here.

But if you’re a creator, you most likely have many comments from your subscribers.

This is where you’ll find them all.

To reply to a comment, select it from the list, which will take you to the comment.


The “Comment failed to post” error on YouTube has many potential causes.

In most cases, a paused ad causes this error to appear. Skip the ad, watch the video a bit, and then try to post your comment.

If this doesn’t work, clear your cookies and cache, disable your VPN, or try using another browser.

Use YouTube on your mobile phone and try using YouTube Studio to reply to subscriber comments.

Try disabling AdBlock or other ad-blocking extensions you’re using, as well.

One of these solutions will help you solve the “Comment failed to post” error on YouTube!

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Alex Popa

My name is Alex and I have a knack for social media in all its shapes and forms. I’ve dealt with such things for quite some time and I noticed that many people have issues with social media and technicalities.

Unforeseen errors, bugs, and other problems make their use of social media problematic. These things will be discussed amply in the guides on Whizcase.

I'll present the facts as they are, and offer quick and easy solutions for them.

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