ads.txt · app-ads.txt
Ads.txt management without the deploys.
Edit, validate and publish ads.txt and app-ads.txt for every site and app you run. Give clients and partners access to update their own files, and see every change that reaches the web.
Free plan for one website, with hosting, validation and monitoring.
- 1# example.com — managed by adstxt.dev
- 2google.com, pub-4410982365071123, DIRECT, f08c47fec0942fa0
- 3rubiconproject.com, 19116, RESELLER, 0bfd66d529a55807
- 4pubmatic.com, 156931, RESELLER, 5d62403b186f2ace
- 5openx.com 540191398, RESELLER
- 6appnexus.com, 12447, RESELLER, f5ab79cb980f11d1
- 7OWNERDOMAIN=example.com
Publishers
Keep ads.txt in sync across all your domains and apps without routing every change through engineering.
Ad networks & SSPs
Check that each publisher lists your lines correctly, and catch missing or broken entries before they cost revenue.
Agencies
Manage files for every client from one account, under your own brand, with access you control.
Features
From one site to a few hundred, managed the same way.
No code changes
Update the file from the dashboard. No tickets, no pull requests, no waiting for the next release.
One place for every file
Every site’s ads.txt and every app’s app-ads.txt, side by side.
Validation before publish
Malformed records are flagged line by line, so a typo never reaches buyers’ crawlers.
Version history
Every change is kept in a change log, and you can roll back to an earlier version at any time.
Sub-accounts and permissions
Invite clients, agencies or your ad ops team and share access to just the files they need.
White label
Run the manager on your own domain, like adstxt.yourcompany.com, for the publishers you work with.
Monitoring
Know when a line goes missing.
A dropped seller line is revenue lost quietly. adstxt.dev watches the files you care about and records every change.
- Demand partner checks
- Confirm each client’s ads.txt carries the correct lines for your demand partners.
- Any website, managed or not
- Track changes and errors on any ads.txt file, even ones not hosted with adstxt.dev.
dailyherald-example.com/ads.txt
12 min agoRemoved: pubmatic.com, 156931, RESELLER
Partner check · yournetwork.com, 8841
1 h agoMissing on 2 of 14 publisher sites
puzzlegames-example.com/app-ads.txt
Yesterday3 lines added, file valid
example.com/ads.txt
YesterdayNo changes since last crawl
What is ads.txt?
Ads.txt (Authorized Digital Sellers) is a plain text file, introduced by IAB Tech Lab, that a publisher hosts at the root of their domain to list every company allowed to sell their ad inventory. Buyers check it to avoid domain spoofing and unauthorized resellers.
What is app-ads.txt?
App-ads.txt is the same standard for mobile and CTV apps. The developer hosts the file on the website listed in the app store, so buyers can confirm who is authorized to sell the app’s inventory.
How do ads.txt and app-ads.txt work?
Each line names an ad system, your account ID with that system, and whether the relationship is DIRECT or RESELLER. Before bidding, buyers crawl the file and only trust impressions that come from a listed seller.
Why manage ads.txt with adstxt.dev?
Editing ads.txt across many sites or clients usually means tickets, deploys and back-and-forth emails. With adstxt.dev the file is edited, validated and published from one dashboard, and you can give clients or partners access to update their own files.
Put your first domain on adstxt.dev.
The free plan covers one website with hosting, validation, version history and monitoring.