Which free AI image generator should you use? If you trust the 'commercial use allowed' label, you'll likely get burned

I just want some nice images for free, but the more I research, the more confused I get. I think quite a few people are stuck in this quagmire.

Let me give you my conclusion first.For everyday use—like blog thumbnails, social media posts, or illustrations for presentations—Gemini is fine for now. You can generate a decent number of images at decent quality for free. Honestly, it's a waste of time to spend hours reading comparison articles.

The exception is 'when you want to include text in the image.' If you want to create banners or thumbnail headings without the text getting garbled, I would lean toward Ideogram.

It is head and shoulders above the rest when it comes to text reproduction (Ideogram Official).

—And that's the light stuff. Here is the main point.

If you are going to 'use those images for work' or 'put them on something you get paid for,' the story is completely different. If you take the 'commercial use allowed' label on free AI image generators at face value and release them to the public, you will likely get burned. This is the one thing I want to convey most today.

Before that: You don't really need to worry about 'how many images per day for free'

There is one thing I want you to relax about first.

'How many images can I generate per day for free?'—While online comparison articles list specific numbers, neither Gemini nor ChatGPT officially disclose their free generation limits. Google only mentions a 'limited free tier' (Google Official Blog), and OpenAI explicitly states that it 'varies based on demand and we do not provide a fixed schedule' (OpenAI Help).

In other words, numbers like '2 images per day for free' that are floating around are almost all based on someone's personal measurements or guesses. They are helpful as a reference, but you shouldn't take them as gospel.

The correct answer is simply to 'open the app and use it until you hit the limit message.' It is 100 times faster to actually try it out and see if it meets your needs than to spend time comparing the exact number of images.

That is why the criteria for choosing should not be 'quantity' but 'what remains after you generate them.' This leads to the next point.

Main topic: The 3 traps hidden in 'free commercial use allowed'

When you see 'commercial use allowed,' you tend to read it as 'then I can use it freely.' But when you actually compare the terms of service of each company, the scope that those words protect is much narrower than you think. There are three major traps.

Trap 1: Even if 'commercial use is allowed,' logos or watermarks remain

'Commercial use allowed' does not mean 'you can use it in a clean state without a logo.' This is the first pitfall.

For example, with Gemini, images created for free will have a 'sparkle' watermark logo in the bottom right corner. You need a higher-tier paid plan (Google AI Ultra) to remove this (Google Official Blog).

In other words, even if commercial use itself is permitted while remaining free, you will end up using images with logos as eye-catchers. It has a subtle but real impact.

So, is ChatGPT safe because it doesn't have watermarks? Not necessarily.

Even if it looks clean, generated images have provenance data called C2PA (Content Credentials) embedded in them (OpenAI Official Help).

In short, the record that 'this image was created by AI' remains, even if it is invisible. It is not an immediate problem, but using it under the assumption that 'no one will find out' is risky.

Trap 2: What is permitted is 'using it.' Whether the content is safe is a different matter

This is the most important trap. The 'commercial use OK' stated by various companies is a statement that 'we give you the right to use the generated images for commercial purposes,' not a guarantee that 'the content of those images does not infringe on anyone's rights.' This is a completely different layer.

Therefore, even if it is okay under the terms of service, the following things can be considered 'out' through other routes: faces resembling real celebrities (portrait rights/publicity rights), pictures that look exactly like existing anime or game characters (copyright), inclusion of corporate logos or trademarks (trademark), and expressions intentionally aimed at 'the style of that artist.'

The Japanese Agency for Cultural Affairs also organizes that whether AI-generated content constitutes copyright infringement is judged on both sides of 'similarity' to the original work and 'whether it relies on' the original work (Agency for Cultural Affairs 'Regarding AI and Copyright').

If you put existing works into the prompt, the possibility of it being seen as 'relying on' them increases.

The troublesome part is that famous logos and characters are included in large quantities in the training data, so even if you are not aiming for them, they can accidentally slip into the generated output (Osaka Trademark Utilization Support Center).

Prevention is simple: do not put proper nouns (real names, work titles, brand names) into the prompt. Give instructions using abstract words like color, texture, and composition. This alone significantly lowers the risk.

Trap 3: Only those who pay are protected 'if they get sued'

The final trap. 'Then, shouldn't I just choose a service that is safe in terms of rights?' you might think. A prime example of that is Adobe Firefly.

Firefly limits its training data to licensed materials such as Adobe Stock and markets itself as 'commercially safe' (Adobe Official).

This much is true.

However—in the unlikely event that the image is sued for copyright infringement, the 'IP indemnification' that Adobe provides to protect you legally is limited to paid plans. Free plans 'permit commercial use, but do not include indemnification = use at your own risk.'

Moreover, this indemnification is voided if you violate Adobe's guidelines (aiming for real people, intentionally imitating others' IP or artistic styles, etc.) (Adobe Generative AI Guidelines).

In other words, it is not 'safe because the training data is safe,' but rather only those who pay money are protected. The convenient idea that you can get commercial safety for free does not exist, at least not right now.

So, how should you use it? Separate 'testing' from 'publishing'

The answer is simple.Separate 'experimenting' from 'publishing' in your mind.

You can use free tools as much as you want for play, drafting, and brainstorming. There are no issues with using anything here. Only take the ones you like to the next step. Andonly when you 'publish' in a place visible to others or involving money, check these three things: watermarks, rights, and compensation.

Be free in your daily work, but be careful when it really counts. If you can draw this line, free AI image generators will become incredibly reliable partners.

I will clearly state my current favorites by use case.

For daily use, Gemini

It has a good balance of quantity and quality, making it the easiest to use for free. You just need to be aware of the logo watermark.If you want to add text to images, use Ideogram. It is strong for banners and logo mockups.

If your top priority in work or client projects is 'not wanting to get sued,' do not fight with free tools. Either get IP compensation with a paid Firefly plan, or don't make generative AI the centerpiece. This is not the place to be stingy.

A word on the rest as well.

Midjourney has the best image quality, but there is currently no free plan for regular use (Midjourney Official)—so it falls outside today's topic of 'free' tools.

Microsoft Copilot and Designer are free and high-quality (DALL·E based), but their commercial usage policy is not clearly stated. I do not use them for commercial production.

Conversely, a surprise isCanva, where the official terms explicitly state thatcommercial use is OK even on the free plan (Canva Official).

However, just be aware that images mixed with existing assets within Canva are bound by the licenses of those assets.Local Stable Diffusion can be used with zero usage fees and in private if you have a PC and a bit of patience, and it is the strongest if you master it.

However, I will be honest about the 'other costs' involved, such as the GPU and environment setup.

Finally

The answer to 'Which free AI image generator is good?' is:Gemini for daily use, Ideogram for adding text, and don't fight with free tools if you want to be protected at work. And what they all have in common is: do not blindly trust the four words 'commercial use OK'.

That phrase only protects your 'right to use' the tool; no one will protect you regarding watermarks, content rights, or compensation in an emergency unless you check those separately.

That said, being too afraid to use them is the biggest waste.Play for free without limits, but be careful only with what you publish. If you keep this distinction in mind, you can compete quite well even with free tools.

Play for free without limits, but be careful only with what you publish. The four words 'commercial use OK' only protect your 'right to use' the tool; no one will protect you regarding watermarks, content rights, or compensation in an emergency unless you check those separately. Please take this one point home with you.

—Tell me one thing. With which tool and in what situation did you hesitate, thinking, 'Is it okay to show this to the public?' when using a free AI image generator? An indelible logo watermark, the license of mixed-in assets, a face that ended up looking like a real person—even just a word is fine. If you can tell me in the comments, it will serve as a good checklist for others who feel that 'chill before publishing' in the same situation.

At this laboratory, I continue to honestly verify 'how far you can fight for free, and where the costs begin' with free AI. Image generation is one of them. If you find it useful, follow me to receive the next verification.