[Free] I created a tool that can generate thumbnails and SNS posts in bulk using AI

Hello, this is Umino. I have often had these kinds of worries.

PostStudio can solve all of these with a single click.
I am distributing this PostStudio for free. Please read until the end.

*A separate API usage fee (actual cost) of about a few yen to 25 yen is required for generation.
I explain this in detail below.

What is PostStudio?

PostStudio is a Chrome extension that automatically generates thumbnail images and SNS post captions from blog articles.

Just launch it by right-clicking on an article to automatically retrieve the title, body, and OGP image. Then, just choose a template and press the "Generate" button.

The AI understands the content of the article and generates the optimal thumbnail and post caption for you.

Main Features

1. Nano Banana Pro Thumbnail Generation

Uses the high-performance image generation model Nano Banana Pro (Nano Banana is also available) to generate thumbnails that match the content of the article.

• Supports multiple aspect ratios, including 21:9 (X articles), 16:9, 1:1, 3:4 (X vertical), and more

• Theme colors can be specified

• Can save frequently used images such as character images to a library

• Save templates to reuse them as many times as you like

• Generate 1 to 3 images at a time

• Can also resize thumbnails for articles that have already been set up

• Inexpensive Nano Banana can also be selected for image generation that does not require text

2. Automatic generation of social media posts

The AI summarizes the content of the article and automatically generates posts for social media.

• Optimized for X (Twitter), Threads, and YouTube posts

• Go to the posting screen for each social media platform with one click

• Customization of prompts for post generation is also possible

3. Template management

• Save your favorite templates

• Organize by grouping

• Export/import in JSON format

• Thumbnail Creator template packs (ZIP) are also supported

• Display only favorites or pin groups

How to use

STEP 1: Installation

Download the ZIP at the bottom of this page, unzip it, and save it in a location where it won't be easily deleted. In the Chrome extensions screen (chrome://extensions), select "Load unpacked" and choose that folder to add it.

STEP 2: Open an article and launch

Open the article you want to create a thumbnail for, and right-click to launch PostStudio.

STEP 3: Create an account on fal.ai

fal.ai Create an account at , get an API key, and enter it into the PostStudio settings screen.

Create an account using Google authentication

Click here

STEP 4: Charge your fal.ai account

Since fal.ai uses a prepaid system, there is absolutely no need to worry about 'getting a huge bill without knowing it!' You can create dozens of thumbnails with a charge of about 500 to 700 yen.

If you deposit about 10 dollars (approx. 1500 yen) from 'Add Credit' or about 5 dollars (approx. 750 yen) from 'Custom', you can use it for a while!

(For Nano Banana Pro, it's about 25 yen per image; for Nano Banana, it's about 8 yen per image; text generation is also a few yen.)

STEP 5: Set your fal.ai API key

Click Settings in the center -> API Keys -> API Key (purple button).

Click 'Create Key' and copy the displayed API key.

Save the API key in the top field from the settings icon in the top right of PostStudio.

That's all the setup required.

There are 5 templates included by default, so you can start using it right away with just these!

API costs for generation

PostStudio itself is completely free.

Image generation and text generation incur fal.ai API usage fees (actual costs), but since it is a pay-as-you-go system, you only pay for what you use.

It's safe because it's a system where you charge FAL.AI in advance, preventing overspending..

Recommended for people like this

• Those who spend time creating thumbnails every time they update their blog

• Those who find it troublesome to think of text for SNS posts

• It's a hassle to open Canva

• I want to change the size of existing thumbnails for X posts, YouTube, or Standfm community posts

• I want to use templates from Thumbnail Creator (an extension created by Keisuke-san)

FAQ

Q: Can I use it on a smartphone?
No, you cannot. Please use it on a PC Chrome browser (or a browser that supports Chrome extensions).

Q: Is commercial use allowed?
Yes. The models provided by fal.ai are available for commercial use. No watermarks will be added.

Q: Is it completely free?
No. While using PostStudio is free, you will incur costs because you use your own API key for generation. It costs about 25 yen for Nano Banana Pro, and about 8 yen for Nano Banana or text generation.

Q: Can I generate images without referencing article content?
Yes. You can generate images by entering only the image generation prompt, so you can also use it when you just want to generate images with Nano Banana (Pro).

Q: I want to change the aspect ratio of an article thumbnail
You can. In that case, check 'Include article thumbnail as reference image', delete the title and body text, and use the aspect ratio change template.

Q: Can I use templates from Thumbnail Creator created by Keisuke-san?
Yes. Since we use the same specifications, you can import Zip files that you have purchased or exported. (Thumbnail Creator is here)

Download

You can download the PostStudio Zip file from below.
Please see STEP 1 above for installation instructions.

Github is here