How to Add an Ads.txt File in WordPress (3 Ways, and What the Line Actually Means)

The first time I saw the "Earnings at risk" banner in AdSense, it looked worse than it was. One red line, a countdown feeling, and a file I had never heard of.

It turned out to be a two-minute fix.

AdSense wants a small text file called ads.txt sitting in your site's root, listing who is allowed to sell ads on your domain. No file, and Google flags your inventory as unverified.

I have set this up on plenty of WordPress sites since. Here is the exact line to paste, three ways to put it live, and the part most guides skip: what that line actually means.

What is ads.txt, and why does AdSense keep warning you?

ads.txt stands for "authorized digital sellers". It is a public list of the ad companies you have allowed to sell ad space on your site.

The point is fraud protection. Without it, a scammer can claim to sell your inventory on shady exchanges, and buyers have no way to tell fake from real. The file lets Google and every ad buyer check the list and ignore anyone not on it.

That is why AdSense shows "Earnings at risk".

It is not a penalty, and you did nothing wrong. Google just cannot yet verify who sells your ads, so it holds back demand until you publish the file.

What does each line in ads.txt actually say?

This is the bit that trips people up. Every line is one ad network, written as four values separated by commas. Get one wrong and the whole line is ignored.

For Google AdSense, the line looks like this:

google.com, pub-1234567890123456, DIRECT, f08c47fec0942fa0

• google.com: the ad system. For AdSense this is always google.com.
• pub-...: your publisher ID, pulled from your AdSense account. This is the only part that changes per site.
• DIRECT: your relationship with the network. DIRECT means you deal with Google yourself; RESELLER means a third party sells on your behalf.
• f08c47fec0942fa0: Google's certification ID in the ads.txt system. Always this exact string for AdSense.

Three of the four values are fixed. The only one you supply is your publisher ID, so copy that one carefully.

Where do I find my exact AdSense line?

Do not guess the publisher ID, and never copy it from a guide. Get the real line straight from Google.

In your AdSense account, open Sites. When ads.txt is not verified you see the "Earnings at risk" banner and a Create an ads.txt file card, with a Download button that hands you the file already filled in for your account.

Use that line as-is. It already has your pub- number baked in, so there is nothing to type by hand and nothing to mistype.

If you run more than one ad network, you will add one line per network. AdSense first, then any others, each on its own line.

Three ways to add ads.txt to WordPress

WordPress has no built-in "upload ads.txt" button, so you add the file one of three ways. Pick by how comfortable you are touching files.

For nine sites out of ten, I use the plugin. It is the least error-prone, and it keeps the file out of harm's way when you change hosts or themes. One small plugin like this will not slow your site down either.

Method 1

01

Add ads.txt with the Ads.txt Manager plugin

Best for: Almost everyone — no file access needed

The free Ads.txt Manager by 10up writes a virtual ads.txt for you, so you never open a file manager. It is the one I reach for first, and it sits comfortably next to the other plugins I install on every WordPress site.

4.7/5100,000+ installsFreeTested to 7.0on WordPress.org

Step 1

1

Install and activate the plugin

In your dashboard go to Plugins, Add New, search for "Ads.txt Manager" by 10up, then click Install and Activate.

Step 2

2

Open the editor

Go to Settings, Ads.txt. You get a plain text editor titled "Manage Ads.txt".

Step 3

3

Paste your line and save

Paste the line you copied from AdSense, add any other networks below it, and click Save Changes. The plugin validates the format and warns you if a line is malformed.

That is it. The file goes live instantly at yourdomain.com/ads.txt, and there is no physical file to lose later.

Method 2

02

Add ads.txt without a plugin, via File Manager

Best for: No plugin, and your host has cPanel

If you would rather not add a plugin, you can create the file directly in your hosting File Manager. This is the top "without plugin" method people search for, and it is genuinely simple.

Step 1

1

Open File Manager and go to the root

In cPanel (or your host's panel), open File Manager and navigate to public_html. That is your site's root, the same folder that holds wp-config.php.

Step 2

2

Create the file

Click + File, name it exactly ads.txt in lowercase, and create it in public_html, not in a subfolder.

Step 3

3

Edit, paste and save

Right-click the file, choose Edit, paste your ads.txt lines, and save. Make sure it saves as plain text.

The catch: if you later move hosts, this physical file does not travel with your WordPress export, so you will recreate it. That is the one reason I lean plugin.

How do I check my ads.txt is actually working?

Never assume it worked. Confirm it two ways.

Load it in a browser. Go to yourdomain.com/ads.txt directly. You should see your lines as plain text. A 404 means the file is in the wrong folder, almost always a subfolder instead of the root.

Wait for AdSense to re-check. Once the file loads correctly, the "Earnings at risk" warning clears on Google's own schedule, usually within a day or two. You cannot force it, so give it 24 to 48 hours before worrying.

If the warning lingers after that, re-read the line character for character. A mistyped pub- number is the single most common reason a correct-looking file still fails.

What lines do other ad networks need?

If you use a network other than AdSense, add its line too. Each network publishes its own required entries; here is where to find them.

Always paste the exact block your network gives you. These lists change as networks add partners, so copy fresh rather than reusing an old block from a guide.

What about app-ads.txt?

app-ads.txt is the same concept for mobile apps rather than websites. If you monetize an Android or iOS app, you publish it the same way, in your root.

For a normal WordPress site with no companion app, you can ignore it. Plain ads.txt is all you need.

Final take

ads.txt is a two-minute job that looks scarier than it is. Get your exact line from AdSense, put the file in your site's root by whichever method suits you, and confirm it loads at yourdomain.com/ads.txt.

The plugin is the safest route for most people. The file manager and FTP methods do the same thing by hand.

Once the file is live and correct, the "Earnings at risk" warning clears on its own. If it does not, the fix is nearly always a mistyped publisher ID, so check that line first, character for character.