Free Tools for Publishers and Advertisers
Every bannerTag tool is free, works in your browser and needs no sign up. Use them to plan ad revenue, fix your ads.txt file, choose ad sizes and create banners.
CPM CalculatorWork out CPM, page RPM or eCPM from any two numbers.Open the tool →
Ad Revenue CalculatorEstimate how much your website can earn from display ads.Open the tool →
Ads.txt CheckerFind errors in ads.txt and app-ads.txt and verify sellers.json.Open the tool →
Ads.txt GeneratorCreate a clean ads.txt or app-ads.txt file with partner presets.Open the tool →
Banner Ad SizesSee every standard display ad size to scale, for desktop and mobile.Open the tool →
Online Banner MakerDesign banner ads and download PNG, JPG or animated HTML5.Open the tool →
YouTube Money CalculatorEstimate YouTube earnings from long-form and Shorts views.Open the tool →
Word CounterCount words, check SEO lengths, readability and keywords.Open the tool →
Header Bidding Timeout CalculatorFind the best Prebid timeout: bids in time, missed bids and ad delay.Open the tool →
UTM BuilderBuild UTM campaign links for Google Analytics and check the GA4 channel.Open the tool →Which tool do you need?
- Planning revenue? Start with the ad revenue calculator, then check your numbers with the CPM calculator.
- Setting up ad partners? Build your file with the ads.txt generator and test it with the ads.txt checker.
- Designing ads? Pick a format in the banner ad sizes guide, then create it in the banner maker.
- Working on YouTube? Try the YouTube money calculator and read our YouTube CPM rates 2026.
Want to learn more first? Read RPM vs CPM vs eCPM and how to put ads on a website.