15 Best FREE Custom GPTs on GPT Store (2025)

Are you looking to enhance the capabilities of ChatGPT or tailor it to your personal needs? Well, it’s possible now with Custom GPTs. But with thousands of GPTs in the GPT Store, finding the right ones can be quite challenging. 

I’ve been an avid user of ChatGPT ever since its launch. Over the past few months, I’ve extensively used custom GPTs from the GPT Store. Based on my personal experience and research, I’ve compiled a list of the 15 Best Custom GPTs on the GPT Store.

We will begin by explaining what custom GPTs are, along with their key benefits. We will then dive into the Best Custom GPTs on the GPT Store and also look at a few tools you shouldn’t consider. Finally, we’ll also offer tips and considerations to use them effectively. 

Ready to explore how ChatGPT can be customized for your specific use case? Let’s dive in!

15 Best Custom GPTs on GPT Store (Table)

Custom GPTs	Category	Function
Write for Me	Writing	Writing assistant for blog, table, captions, business plan, etc.
AI Humanizer	Writing	Convert AI Content into human-like content
Copywriter GPT	Writing	Design engaging videos with voiceovers from a text prompt
Video AI	Productivity	Get budget travel plans and discover lesser-known travel destinations.
Presentation & Diagram Generator by ShowMe	Productivity	Create diagrams and presentations from a text prompt
Image Generator Pro	Productivity	Generate logos and images from the text prompt
Scholar GPT	Research & Analysis	Find the latest research papers from Google Scholar, PubMed, etc.
Universal Primer	Education	Simplifies a complex topic and scientific theory
Math Solver	Education	Solve math step-by-step, and provide explanations with formulas
Summarizer 2	Education	Generate a quick summary of text content in any language
Python	Programming	Write and run advanced Python code
Code Copilot	Programming	Code execution, code review, and debug
Website Generator	Programming	Design & host a website with content, images, buttons, and more.
Fitness, Workout & Diet	Lifestyle	Suggest workout routines and diet plans
Travel Guide	Lifestyle	Plan trips and get budget estimates

What Are Custom GPTs?

Custom GPTs are fine-tuned AI tools designed for a specific niche or context. They leverage existing AI models, like ChatGPT, to generate realistic and coherent responses. You can customize them to suit your requirements without knowing a single line of code!

What makes them different from ChatGPT is their dataset. They are trained on a focused dataset for a particular industry. When you feed this data to your AI model, you can customize the outputs to your specific needs. 

OpenAI has recently released Custom GPTs for ChatGPT. They are customized versions of ChatGPT for your particular use case. Previously, they were only available to ChatGPT Plus users. But now, they have extended this functionality for ChatGPT free users, too. 

You can find hundreds of custom GPTs on the OpenAI GPT Store in categories like education, lifestyle, productivity, writing, programming, research, and analysis etc. Custom GPTs for ChatGPT work on the GPT-4o model. But on the free plan, you get limited access to GPT-4o.

Benefits of Custom GPTs

1) Can be Personalized

Unlike ChatGPT, Custom GPTs can be trained on your custom database that applies to your industry. This can help in making ChatGPT’s responses more apt. Besides data, you can also customize the tone and style of your GPT’s responses to suit your requirements.

For instance, a law firm can train the custom GPT on all their legal documents and assign it a formal tone. The GPT can then answer questions regarding contracts and legal queries with a professional tone and accuracy. 

2) Easy to Use

Creating a custom GPT can be an effortless process, not requiring coding expertise. You can usually define the behavior of your GPT within a user-friendly interface. You can easily use pre-designed custom GPTs from the OpenAI GPT Store. 

It’s quite similar to using App Store or Play Store apps. But instead of downloading the GPTs, you can directly start chatting with them in your ChatGPT dashboard. 

3) Saves Time

The outputs generated by AI tools are only as good as your prompts. But with custom GPTs pre-trained for your use case, you can evade the need to write detailed prompts for every query. Thus, using custom GPTs can save a ton of time and improve the efficiency of your outputs. 

15 Best Custom GPTs on GPT Store (2025)

There are about 159k+ public custom GPTs available in the OpenAI GPT Store. You can search them by categories like top picks, writing, productivity, etc. Below is a list of some of the best custom GPTs I found useful on the GPT store.

Category: Writing

1. Write for Me

Ratings	4.3/5
Conversations	30M+
Official Website	Visit Website

If you’ve ever used ChatGPT for writing, you’ll find Write for Me a valuable tool. It works for all types of content, whether tutorials, lists, essays, blog posts, or long-form articles.

Using Write for Me is simple: just enter the title or topic of your content. You can also specify the desired word count and the intent or purpose of the piece. If needed, you can include subheadings or upload a PDF, image, and docx directly in your prompt to guide the structure.

Plus, this custom GPT allows you to generate tables. For example, I created a comparison table of the 5 top VPNs for 2025. It accurately considered the key factors and produced a concise list. However, not all of the data was accurate (for instance, server counts were incorrect). You can also use this feature to generate product descriptions.

Write for Me directly integrates with Google Drive and Microsoft OneDrive. It analyzes similar content available online and generates text accordingly. Keep in mind that the output may sometimes feel AI-generated or mechanical. Therefore, you’ll need to edit and proofread it carefully before publishing.

Overall, Write for Me is an excellent productivity tool for bloggers, content creators, copywriters, digital marketing agencies, and anyone dealing with content.

Limitations

• Does not always adhere to the specified word count
• Content can sound robotic at times
• Data and numerical information may not always be accurate

2. AI Humanizer

Ratings	4.0/5
Conversations	6M+
Official Website	Visit Website

AI-generated content often struggles to rank at the top of search engine results. It can sometimes sound robotic and unnatural. If you rely heavily on AI tools to create blogs, captions, or copy, AI Humanizer can help eliminate that robotic feel.

This custom GPT is specifically designed to transform AI-generated text into more natural, human-like content. It adjusts the text, tone, structure, and even the style. AI Humanizer replaces overused phrases and common AI-generated wording to give your content a more authentic touch.

To use the Humanizer, you’ll need to link your ChatGPT account with GPTinf. Simply upload your content, and it will be edited and refined within seconds. To test its performance, I ran both AI-generated content and humanized content through Copyleaks (a popular AI content detector). The difference is clearly visible in the images provided.

While many AI humanizers are paid and come with multiple limitations, this custom GPT can be a game-changer for novice content writers, new marketers, students, and individuals looking to enhance their content for free.

Limitations

• No option to select content mode or tone 
• Occasional errors when linking with GPTinf
• No built-in AI detection feature

3. Copywriter GPT – Marketing, Branding, Ads

Ratings	4.2/5
Conversations	2M+
Official Website	Visit Website

Are you looking for custom GPTs designed exclusively for marketing copy? Most AI writing tools, like “Write for Me”, produce generic social media content and often lack creativity. Don’t worry! Copywriter GPT solves that problem.

It’s a uniquely designed tool, ideal for generating brand copy, ads, and social media content. After opening the app, you can provide a detailed prompt about your copywriting project. If you don’t have one ready, it will guide you by asking a few simple questions, such as your target audience, goals, brand tone, and themes, to generate tailored content for your brand.

You can even get complete campaign and advertisement ideas. For example, when I asked for an offline campaign idea for a bakery brand launching new products, Copywriter GPT created a beautiful table. It outlines essential factors like target audience, objectives, tactics, promotions, visual merchandising, collateral, and even budget estimates.

So, I found this tool incredibly helpful for marketers, small digital marketing agencies, and freelancers.

Limitations

• Struggle to incorporate industry-specific jargon
• Ask similar questions when generating ad copy for different topics

Category: Productivity

4. Video AI

Ratings	4.0/5
Conversations	7M+
Official Website	Visit Website

Video AI is another useful custom GPT from Invideo AI. It creates videos with voiceovers directly from a text prompt. This AI video generator helps you save time and effort. With just a short piece of written content, you can quickly generate marketing videos, social media shorts, and subtitles.

When writing your prompt, it’s best to specify details like video length, aspect ratio, and the social platforms where you intend to share the video. For example, I used the prompt above to create a video on “DeepSeek AI.” The tool initially suggested two video ideas. Once you select the one you’re satisfied with, it begins generating the video.

The video generator offers two media options: Generative Media and Stock Media. Unfortunately, Generative Media is a paid feature. After selecting your preferred option, you’ll also choose the target audience, media pace, and platform, and then your video will be ready.

Overall, the video generator defaults to English voiceovers and takes a reasonable amount of time to produce the final output. It’s an excellent tool for YouTubers, influencers, and marketing agencies.

Limitations

• Exported videos have a watermark
• Generative Media features are not free
• Maximum export quality is 1080p

5. Presentation & Diagram Generator by ShowMe

Ratings	3.9/5
Conversations	3M+
Official Website	Visit Website

If you need help with visual representations of any concept, the Presentation & Diagram Generator by ShowMe can assist you. This is a powerful custom GPT designed to create both diagrams and presentations.

For example, you can generate flowcharts, mind maps, Gantt charts, process flows, Venn diagrams, wireframes, and blueprints. To get the best results, you’ll need to provide a clear and specific prompt. Overall, the diagrams are clean and informative. You can view them in full screen, download them as PNG files, or edit the code for further customization.

In addition, as an AI presentation maker, it can create PowerPoint presentations, pitch decks, templates, slideshows, and designs. The presentation maker is quite effective. After entering your topic, it automatically generates a draft outline. If you’re satisfied with it, you can sign in at slides.co to access your presentation, complete with speaker notes. You can then download the PPTX file or view and edit your presentation online.

In my experience, Presentation & Diagram Generator by ShowMe is useful for students, educators, and professionals. However, you may need to customize the output to achieve a fully polished, professional appearance.

Limitations

• Presentation themes and styles are uniform by default
• Cannot create pie charts
• Diagram generation can be slow

6. Image Generator Pro

Ratings	3.5/5
Conversations	5M+
Official Website	Visit Website

AI image generators are booming, but what if you could use one right inside ChatGPT? Image Generator Pro makes it possible! 

It helps you design both logos and AI-generated art. Just describe the image type, style, and any specific details, and it’ll generate an image within seconds. 

For the logo generator, the tool asks a few simple questions, like your brand name, vibe, color scheme, and symbols. You can also give a detailed prompt (like I did in the image below).

I’m genuinely impressed with the logo generator. It accurately followed my prompt, including both elements and text. The AI art generator also produced impressive results quickly. Plus, you get different edit suggestions to create multiple variations of the same image.

So, this custom GPT is perfect for entrepreneurs and small business owners to create fast, affordable branding assets, content creators and marketers to produce visuals and graphics, and non-designers to generate polished images without needing design skills.

Limitations

• Requires detailed prompts for better output.
• No default customization options are provided.

Category: Research & Analysis

7. Scholar GPT

Ratings	4.3/5
Conversations	19M+
Official Website	Visit Website

Students and researchers, are you tired of spending hours in Google Scholar or PubMed? No more need to stain your eyes! Scholar GPT simplifies the research work for you! It has the power to research with 200 M+ resources and critical thinking ability.

To get started, you simply need to enter your topic or question, and it’ll fetch all the relevant data along with references and a short overview around it. You can also request Scholar GPT to search for research papers, journal articles, patents, or books around your topic.

If you’re writing a research or academic paper, Scholar GPT can function as your assistant. It can not only create an outline for your research paper but also sweep the internet to bring all the relevant research and references for you. 

It can also fact-check your assignments or scientific papers and suggest improvements to them. Overall, it can immensely help you cut down the time spent on research. Research scholars, educators, academic writers, and bloggers will find Scholar GPT super useful for advanced and in-depth research.

Limitations

• Struggles to research topics within a specific timeframe.

Category: Education

8. Universal Primer

Ratings	4.6/5
Conversations	3M+
Official Website	Visit Website

Many students and non-tech-savvy learners often struggle to grasp technical topics. They may find it challenging to understand their academic subjects or any particular area of interest. If you’re facing similar difficulties, Universal Primer GPT can help.

It’s an incredible tool that simplifies understanding complex theorems, technical topics, or jargon. Simply enter a topic, and it instantly generates a brief covering key facts, notable figures, foundational concepts, and more.

You can even break down any concept with a step-by-step plan, receive tabular data, or get an objective understanding. For example, I used the prompt, “Enlighten me on startup funding stages, from seed to IPO,” and it generated the output I needed.

This custom GPT tool is incredibly helpful for students and lifelong learners exploring interdisciplinary topics like AI ethics, climate science, or political philosophy. It’s also a great resource for writers, journalists, creators, and anyone seeking a broad base of knowledge across various fields.

Limitations

• GPT Plus usage limits may hinder detailed research at times.
• Explanations can sometimes be either too technical or too surface-level.

9. Math Solver

Ratings	4.2/5
Conversations	2M+
Official Website	Visit Website

Math questions can be confusing, especially if you don’t have an expert to clarify your doubts. This is where Math Solver comes in. It functions exactly like your maths tutor, giving you step-by-step solutions to solve any math problem. 

Whether it’s a simple elementary-level problem, a logical reasoning problem, or even complex engineering math questions, Math Solver gives you accurate answers along with detailed steps to reach the solution.

In the example above, I prompted it to solve a Calculus problem and was impressed by its presentation of the solution. The tool offers step-by-step answers, provides explanations with formulas, and suggests related knowledge or questions.

Overall, math students and mathematics enthusiasts should definitely use Math Solver GPT to get help with their assignments and solve complex concepts and questions.

Limitations

• May provide incorrect answers and solutions for numerical problems involving graphs.
• Inability to directly copy and paste answers.

10. Summarizer 2: PDF Book Article Web Text Code Image

Ratings	4.3/5
Conversations	1M+
Official Website	Visit Website

Gone are the days when people read every word of an article or watched entire videos from start to finish. Today, we have smarter, more efficient tools, like Summarizer 2. This tool can generate concise summaries of any video, image, movie, or blog post in the language of your choice.

Simply paste the content or enter the topic you want summarized. Then, prompt it to generate a summary in your preferred language. You can also customize the format, choose from bullet points, paragraphs, and more.

But that’s not all—Summarizer 2 GPT can even summarize code and analyze uploaded images or documents (PDFs, DOCs, etc.) to produce informative overviews. Want a quick summary of a book on your reading list? It can do that too.

If your work involves research, content creation, education, or anything similar, this GPT can be an incredibly valuable assistant!

Limitations

• Errors may occur when importing website links or video URLs.

Category: Programming

11. Python

Ratings	4.3/5
Conversations	4M+
Official Website	Visit Website

Developers and AI/ML Practitioners need help with Python coding? You’re in luck! ChatGPT has introduced a specialized GPT called Python. It’s designed for this high-level, general-purpose programming language.

With this tool, you can develop machine learning models, visualize data, generate code, and much more. It features two powerful modes: /notebook for running and iterating on code interactively, and /canvas for structured document or code editing.

This custom GPT not only supports code execution but also assists with file analysis and Python-powered AI workflows. For example, I’ve tested both /notebook and /canvas modes, they’re intuitive and efficient.

So, this tool is especially valuable for Data Analysts to explore, clean, visualize, and model data. It’s also highly useful for Developers who need scripting support, code generation, and debugging, as well as for Researchers and Academics conducting experiments, simulations, and computational analysis.

Limitations

• Advanced coding support is only available to ChatGPT Plus and Pro users.

12. Code Copilot

Ratings	4.1/5
Conversations	8M+
Official Website	Visit Website

Need help with your code? Try Code Copilot! This versatile tool will help you with all your coding worries. Be it analyzing your code, optimizing, finding and fixing bugs, or writing new code from scratch, Code Copilot can do it all. 

For example, in the below image, I provided Code Copilot with some code and asked it to explain what it does. Similarly, you can also use it to break down the complex documentation of any library or language by providing its URL. Then you can prompt it to simplify the documentation and make it understandable, even for a novice. 

Again, the image below shows how I used Code Copilot to fix my code. I provided it with my code and information on the modules I used. It analyzed my code, spotted the errors, and even corrected my code so that it was executed successfully! 

I also used it to create a new module and was surprised how it precisely followed all my instructions regarding object names, module functionality, and coding language! My favorite feature of Code Copilot was Technology Discovery. For instance, if you’re building a project, Code Copilot can suggest all the relevant technologies you can use to develop it efficiently. 

Overall, Code Copilot will be a great tool for software developers, code testing and verification professionals, coding trainers, and students.

Limitations

• Free users can only perform basic coding tasks.

13. Website Generator

Ratings	4.1/5
Conversations	3M+
Official Website	Visit Website

Website Generator is a useful GPT tool that allows you to create websites for free. It not only designs and hosts websites in seconds but also assists with content, images, buttons, and more.

For example, I created a portfolio website for a content writer using a very simple prompt. The tool asked a few basic questions, like the brand name and a short description of my work and then immediately began designing a beautiful, launch-ready website.

You can edit and further customize the website design. The tool also helps with publishing your site. To do that, you’ll need to sign up with B12, a popular AI website builder. However, to use a custom domain, you must upgrade to their premium plan.

Considering the limitations of the free plan, Website Generator is ideal for small business owners, solopreneurs, freelance designers, and new marketers.

Limitations

• Custom domains are unavailable with free website hosting 
• Cannot create a one-page website
• Auto-generates websites with similar styles and themes

Category: Lifestyle

14. Fitness, Workout & Diet – PhD Coach

Ratings	4.6/5
Conversations	1M+
Official Website	Visit Website

Most of us struggle to create a proper fitness and diet plan that we can consistently follow. This is where the Fitness, Workout, and Diet GPT comes in. It provides workout routines and dietary recommendations based on health conditions, meal preferences, and other personal parameters.

I asked the GPT to create a personalized workout and diet routine, providing details such as my height, weight, and existing health conditions. It responded with a scientifically tailored workout plan and even generated a PDF. Impressively, it considered my cultural preferences, meal choices, food allergies, and more. 

If you already have a fitness plan, you can use this GPT to make improvements. Simply share your existing plan and prompt it to include better exercises or focus on specific goals you’re targeting. It includes a personal fitness tracker and adjusts diet plans based on any restrictions you specify.

You can even use it to get answers to your fitness and nutrition-related questions. If you’re passionate about health and fitness, this tool is definitely worth trying!

Limitations

• Free users receive only a limited workout and diet plan

15. Travel Guide

Ratings	4.4/5
Conversations	1M+
Official Website	Visit Website

Planning a trip can be a daunting task. From budgeting to making a list of the places to visit, it takes a lot to plan a good trip! But not anymore with Travel Guide. This is a very useful GPT that can help you make a travel itinerary on a budget. 

All you need to do is enter a prompt specifying the place you want to visit, the number of days you plan to stay, and any custom instructions. For example, I asked it to create a travel itinerary for Kerala for 5N/6D. I provided the names of the spots I wanted to visit and also requested budget estimates. It generated a beautiful day-wise plan with travel times, sightseeing details, and more.

What I liked most about Travel Guide was its gold mine of information, even about lesser-known places! You can simply use the prompt “Tell me some hidden gems of [enter place]”. You’ll be amazed at the results!

Alternatively, if you have your travel plan ready and want to modify it, Travel Guide can do that too! Simply upload it and prompt it to trim down the budget, change the days, add new locations, etc. Overall, if you’re a travel enthusiast, this GPT will save you a ton of time on planning your future trips.

Limitations

• Budget estimates are often generic and may not reflect current or location-specific prices.

Custom GPTs You Should Not Consider

1. Canva

Canva GPT claims to help you design social media posts, presentations, logos, and much more! To test it, I tried generating an Instagram post on freelancing tips and offered the details. 

However, the results were pretty average. The images it designed followed the text prompt, but lacked the human creative touch! They felt pretty templatized and were not catchy enough to garner clicks! It’s much better to manually design your images with Canva. 

2. Adobe Express

Adobe Express is a GPT for generating custom design templates. I simply prompted it to create a thumbnail for a review and unboxing video of a mobile phone with my uploaded image.

However, it generated design templates for photography, art, and travel! These were completely irrelevant to my request. Even after testing it with different prompts, the results were still out of context! Overall, I didn’t find it useful for creating templates. 

3. Hot Mods

Hot Mods is a custom GPT that modifies and transforms user-uploaded images into catchy visuals. To test it out, I uploaded an image of a mobile phone and prompted it to modify its color. 

However, it did not return the edited image. Even after prompting it multiple times, I still couldn’t find the image! 

Tips and Considerations While Using Custom GPTs

Checking out custom GPTs from the GPT Store? Well, here are some helpful tips to keep in mind. 

1) Limited Free Queries

Custom GPTs on the GPT Store work on the GPT-4o model. On the free plan, you get limited access to GPT-4o. Once your free queries are exhausted, you’ll have to wait for 3 hours until the queries are renewed. 

2) Website Slowdown

At times, you may experience slow and sluggish speeds on the ChatGPT website and the GPT Store apps. Using a reputable VPN service, in this case, helped me evade slowdown issues. 

3) Inaccurate or Biased Information 

The outputs generated by custom GPTs depend on the data they are trained on. If you have biases in your data, there is are chance they may reflect in the outputs as well. 

So, don’t always consider the outputs produced to be accurate. It’s best to cross-check and verify the facts before believing them to be true.

Why Should You Trust Me?

I’ve been working full-time in the digital domain since 2015. In the last 8+ years, I’ve used and tested hundreds of digital tools. Since the launch of ChatGPT, I’ve extensively talked about ChatGPT SEO Strategies, ChatGPT Extensions, ChatGPT apps, ChatGPT Alternatives, etc. 

Recently, I’ve also tested dozens of custom GPTs available on the GPT Store and found some game-changing tools for content creators, small businesses, bloggers, and productivity enthusiasts. I have included all of them in the list above. 

Experimenting with all these ChatGPT tools has given me immense experience and expertise to recommend the best ones for your requirements.

Conclusion

In this article, we discussed the 15 Best Custom GPTs for ChatGPT. While there are thousands of custom GPTs on the GPT Store, I could only find a handful of them useful.

In my experience, Image Generator Pro, Copywriter GPT, Travel Guide, and Fitness, Workout, & Diet GPT are the best custom GPTs for everyday usage.

Have you used custom GPTs from the OpenAI GPT Store? Which one was your favorite GPT from our list? Do you have any other recommendations? Let me know in the comments section, and we’ll surely try to include it in our list. 

Anyway, this is Kripesh signing off. I’ll be back with more such unique and informative content soon. And if you’re an AI enthusiast, you can subscribe to my newsletter to receive the latest AI news and free AI tools every week! Cheers. 🙂

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