Some tool websites may seem very simple, but they are actually extremely profitable. Today, I’ll open your mind, unveil these websites, tell you how they make money, where their traffic comes from, and why building a free tool website is a great way to make big money. You might just come up with a new idea for a free tool website and build one yourself.
The first tool website introduced here is: fastdl.app , which has a very simple function, allowing you to download videos from Instagram. That’s all it does: you input an Instagram link, and it downloads the video for you.
This idea is super simple, and to be honest, it might not be difficult to build either. With AI programming tools, we could probably quickly create a competing product. But before you start copying, I don’t recommend doing so. Let’s first take a look at its traffic data. This website has over 54 million monthly visitors, and a significant portion of its traffic comes from Google searches. As you might have guessed, it ranks for various keywords related to Instagram video downloads.
If it’s completely free, how does it make money? Look, the website is full of ads everywhere. Every time someone visits the website, it can make money. How much can it make each month? We can make an estimate. Similar websites show that it has 54 million visitors per month, with each visitor browsing an average of 4.21 pages. A lot of this website’s traffic comes from India and Pakistan, and I estimate that the revenue per thousand page views (RPM) is very low, only $2. Even with such a low estimate, this website can still make $458,000 per month. If the RPM can reach $4, it could even make $1 million per month. This shows that being free doesn’t mean you can’t make big money.
The second website is simpler and can be built in a few hours using AI programming. This website is called online-stopwatch.com , which is just an online stopwatch.
Some may ask, who would use an online stopwatch? I can think of several reasons, but more importantly, this website has 3.89 million visitors per month, and each visitor views an average of 7.18 pages, which is truly amazing.
So how does it make money with a free stopwatch? It’s simple, by running ads. People new to this industry may not know that running ads on a website is extremely easy. Google launched AdSense in 2003, which solved this problem. All you need to do is place some code on your website, and you can start collecting money every month without even having to negotiate with advertisers. You just wake up every day and check how much you’ve earned. According to my calculations, this free stopwatch website can earn over $139,000 per month from its free tools.
I’m sharing these websites not for you to build a stopwatch website or copy other ideas, as it’s difficult to outperform established competitors this way. I’m trying to inspire you to think about what free tools you can create to attract a large number of visitors.
The third website is coinvaluechecker.com , which is quite interesting. It is essentially a traditional blog with many articles, and it also includes a free tool that allows you to check the value of coins.
Actually, this doesn’t even count as a tool; it’s more like a search function. You enter the coin’s year, and it returns all relevant articles on the website. But it’s really useful, and I guess because it’s so handy, people stay on the website longer.
How’s the traffic on this website? It’s not as much as the previous ones, but it still has 874,000 visitors per month, and many come from search. This website seems to have been penalized by the algorithm and then recovered, and it’s still growing. Could adding a free tool feature to the website be the reason for its recovery? Search traffic comes from terms like “Value of 1944 Wheat Penny” and “Value of Rare Quarters and Nickels”.
For such a simple blog, how much money can it make by adding a free coin value search function? You can see that there are display ads everywhere on the website. Let’s use a display ad calculator to figure it out. I estimate that the RPM is relatively high, around $10, with each visitor browsing an average of 2.41 pages. The coin value checker can earn over $21,000 per month just from display ads, and there are also affiliate links on the website, so it will surely earn even more.
The tools on the fourth website are much more complex, and I’m quite surprised that it’s actually free. This website is called zerogpt.com , which has both free and paid tools to detect whether the content you provide was written by AI.
You paste the content you want to check into the free tool, and it will give you a score. But it also has a pricing page where you can purchase a subscription. The free tool can only perform a limited number of checks, while the paid version can do more. Building such a tool is not easy, and I’m quite surprised it’s free.
But as I said earlier, free doesn’t mean not making money. This website is full of ads everywhere. Due to the nature of the tool, RPM could be $15 – $20, or even higher. According to SimilarWeb, ZeroGPT has 50.45 million monthly visitors, with each visitor browsing an average of 2.35 pages, which is amazing, and a lot of traffic comes from search. This website is less than 2 years old, isn’t it impressive! A simple calculation of advertising revenue shows that this website can earn $545,000 per month just from ads, and it also has a paid version, which surely makes a lot of money too.
The fifth website is percentagecalculator.net , a simple calculator website that is completely free but makes money by displaying ads. This website has 2.78 million visitors per month, with each visitor browsing an average of 1.36 pages, and a lot of traffic comes from Google organic search. If RPM is calculated at $5, this website can earn $18,900 per month.
The sixth website is photopea.com , a free alternative to Photoshop. It’s not a simple tool; building it is a bit complex, but it was indeed built by a programmer, at least initially. People use this free tool, and the website makes money through advertising. With nearly 14 million visitors per month, each visitor browsing an average of 1.98 pages, it’s a veritable cash cow. Do you want to earn $200,000 per month from a free tool you built? This idea really blows my mind.
The seventh website youtubethumbnaildownloader.com has only one function, which is to download the thumbnail of the YouTube video link you provide, and it is very easy to build. It has 512,000 visitors per month, with each visitor browsing an average of 1.65 pages, and makes money by displaying ads, earning approximately $4,200 per month.
What kind of free tool website can you build? Look, you can build one as complex as a competing product to Photoshop, or one as simple as downloading YouTube thumbnails. As long as it can save people time, make life more interesting, or save money, it’s fine.
Now with AI and no-code platforms, it is not technically difficult to implement. Refer to the previous article:
2025 New Directions: A Comprehensive Guide to Making Money with AI Agents
Of course, I don’t recommend you clone these websites. You should come up with your own unique ideas. Take some time to jot down all the free tool ideas that come to mind, and who knows, you might just plant a money tree!
Home
detail
Shocked! These free tool websites earn millions per month. After reading, I also want to give it a try!
2025-08-19T16:28:44
Some tool websites may seem very simple, but they are actually extremely profitable. Today, I’ll open your mind, unveil these websites, tell you how they make money, where their traffic comes from, and why building a free tool website is a great way to make big money. You might just come up with a new idea for a free tool website and build one yourself.
The first tool website introduced here is: fastdl.app , which has a very simple function, allowing you to download videos from Instagram. That’s all it does: you input an Instagram link, and it downloads the video for you.
This idea is super simple, and to be honest, it might not be difficult to build either. With AI programming tools, we could probably quickly create a competing product. But before you start copying, I don’t recommend doing so. Let’s first take a look at its traffic data. This website has over 54 million monthly visitors, and a significant portion of its traffic comes from Google searches. As you might have guessed, it ranks for various keywords related to Instagram video downloads.
If it’s completely free, how does it make money? Look, the website is full of ads everywhere. Every time someone visits the website, it can make money. How much can it make each month? We can make an estimate. Similar websites show that it has 54 million visitors per month, with each visitor browsing an average of 4.21 pages. A lot of this website’s traffic comes from India and Pakistan, and I estimate that the revenue per thousand page views (RPM) is very low, only $2. Even with such a low estimate, this website can still make $458,000 per month. If the RPM can reach $4, it could even make $1 million per month. This shows that being free doesn’t mean you can’t make big money.
The second website is simpler and can be built in a few hours using AI programming. This website is called online-stopwatch.com , which is just an online stopwatch.
Some may ask, who would use an online stopwatch? I can think of several reasons, but more importantly, this website has 3.89 million visitors per month, and each visitor views an average of 7.18 pages, which is truly amazing.
So how does it make money with a free stopwatch? It’s simple, by running ads. People new to this industry may not know that running ads on a website is extremely easy. Google launched AdSense in 2003, which solved this problem. All you need to do is place some code on your website, and you can start collecting money every month without even having to negotiate with advertisers. You just wake up every day and check how much you’ve earned. According to my calculations, this free stopwatch website can earn over $139,000 per month from its free tools.
I’m sharing these websites not for you to build a stopwatch website or copy other ideas, as it’s difficult to outperform established competitors this way. I’m trying to inspire you to think about what free tools you can create to attract a large number of visitors.
The third website is coinvaluechecker.com , which is quite interesting. It is essentially a traditional blog with many articles, and it also includes a free tool that allows you to check the value of coins.
Actually, this doesn’t even count as a tool; it’s more like a search function. You enter the coin’s year, and it returns all relevant articles on the website. But it’s really useful, and I guess because it’s so handy, people stay on the website longer.
How’s the traffic on this website? It’s not as much as the previous ones, but it still has 874,000 visitors per month, and many come from search. This website seems to have been penalized by the algorithm and then recovered, and it’s still growing. Could adding a free tool feature to the website be the reason for its recovery? Search traffic comes from terms like “Value of 1944 Wheat Penny” and “Value of Rare Quarters and Nickels”.
For such a simple blog, how much money can it make by adding a free coin value search function? You can see that there are display ads everywhere on the website. Let’s use a display ad calculator to figure it out. I estimate that the RPM is relatively high, around $10, with each visitor browsing an average of 2.41 pages. The coin value checker can earn over $21,000 per month just from display ads, and there are also affiliate links on the website, so it will surely earn even more.
The tools on the fourth website are much more complex, and I’m quite surprised that it’s actually free. This website is called zerogpt.com , which has both free and paid tools to detect whether the content you provide was written by AI.
You paste the content you want to check into the free tool, and it will give you a score. But it also has a pricing page where you can purchase a subscription. The free tool can only perform a limited number of checks, while the paid version can do more. Building such a tool is not easy, and I’m quite surprised it’s free.
But as I said earlier, free doesn’t mean not making money. This website is full of ads everywhere. Due to the nature of the tool, RPM could be $15 – $20, or even higher. According to SimilarWeb, ZeroGPT has 50.45 million monthly visitors, with each visitor browsing an average of 2.35 pages, which is amazing, and a lot of traffic comes from search. This website is less than 2 years old, isn’t it impressive! A simple calculation of advertising revenue shows that this website can earn $545,000 per month just from ads, and it also has a paid version, which surely makes a lot of money too.
The fifth website is percentagecalculator.net , a simple calculator website that is completely free but makes money by displaying ads. This website has 2.78 million visitors per month, with each visitor browsing an average of 1.36 pages, and a lot of traffic comes from Google organic search. If RPM is calculated at $5, this website can earn $18,900 per month.
The sixth website is photopea.com , a free alternative to Photoshop. It’s not a simple tool; building it is a bit complex, but it was indeed built by a programmer, at least initially. People use this free tool, and the website makes money through advertising. With nearly 14 million visitors per month, each visitor browsing an average of 1.98 pages, it’s a veritable cash cow. Do you want to earn $200,000 per month from a free tool you built? This idea really blows my mind.
The seventh website youtubethumbnaildownloader.com has only one function, which is to download the thumbnail of the YouTube video link you provide, and it is very easy to build. It has 512,000 visitors per month, with each visitor browsing an average of 1.65 pages, and makes money by displaying ads, earning approximately $4,200 per month.
What kind of free tool website can you build? Look, you can build one as complex as a competing product to Photoshop, or one as simple as downloading YouTube thumbnails. As long as it can save people time, make life more interesting, or save money, it’s fine.
Now with AI and no-code platforms, it is not technically difficult to implement. Refer to the previous article:
2025 New Directions: A Comprehensive Guide to Making Money with AI Agents
Of course, I don’t recommend you clone these websites. You should come up with your own unique ideas. Take some time to jot down all the free tool ideas that come to mind, and who knows, you might just plant a money tree!