How to increase the DPI (resolution) of an image! My experience with 4DDiG AI image quality software!

Hi, I'm Takeo Fujii.

If you want high quality images and photos,The DPI (dots per inch) setting is very important.

Especially for image files in jpeg and jpg formats, the DPI value greatly affects the quality of the printed image.

However, it is difficult for beginners to accurately check the resolution of an image and change or improve it.

This article provides a thorough explanation of how to increase DPI, from free online tools to professional Photoshop.

In addition, the 2025 focus onAI-equipped software "4DDiG File Repairfeatures and its versatility in repairing corrupt files as well as images. At the end of the article, information on discount coupons is also included.

If you want to "clean up your images" or "easily increase resolution," please see this page to the end.

What is DPI? Basic knowledge to check and change the resolution of an image

DPI (dots per inch) is a number that indicates how densely an image or photo is displayed or printed.

Simply put, it indicates how many dots an inch (about 2.54 cm) contains.

The higher this number, the finer and smoother the printed material and on-screen display.

Why is image resolution important?

If the resolution of the image is low,The result will be blurry when printed.

A minimum of 300 DPI is often recommended, especially for large physical output such as posters and flyers.

On the other hand, about 72-96 DPI is considered standard for display on the Web and smartphone screens.

If you want to change the DPI of an image, in addition to using dedicated software such as Photoshop, there are also recent applications and online tools that utilize AI, which can be easily used.

So I will explain exactly how you can actually check the DPI of a jpeg or jpg image.

How to check DPI of jpeg and jpg images (for Windows and Mac)

To check the DPI of an image, you do not need to use any special application.

If you are using a PC, you can use the standard functions in Windows or Mac. Here are some basic checks in each of these environments.

For Windows

1. Right-click on the image file you wish to check and open "Properties".
2. Selecting the "Details" tab will display the horizontal and vertical DPI of the image (usually 96 DPI, 300 DPI, etc.).
3. If you are considering printing or processing, check that this number reaches the desired resolution.

For Mac

1. Open the image in the "Preview" application.
2. Click "Tools" on the menu bar, then "Show Inspector".
3. In the information window that appears, select the "Image Information" tab to see the DPI.

You can easily check the resolution of your images using these methods, so it is important to first determine the current state of the image. If the resolution is not suitable for your purposes, consider changing it using the methods described in the next section.

For cell phones

In many cases, the standard functions of iOS and Android cannot directly check DPI, so a dedicated app may be required.

How to check the resolution of an image, not just the DPI, is simple. We will explain step by step.

iOS (iPhone)

1. Open the "Photos" app.
   • Tap the "Photos" application from the home screen to launch it.
2. Select an image
   • Tap the photo whose resolution you want to check to open it.
3. Check the resolution
   • Once the image opens, swipe up from the bottom of the screen.
   • Or, tap the "i" icon (information icon) on the screen.
   • Resolution in pixels (e.g. 3024 x 4032).

Android

First, open the image

Press the three-point reader (...) icon in the lower right corner.

Press "Details" when the menu appears.

Detailed information about the image is displayed. The resolution of the image can be checked from this file information.

You can still check the resolution by using an image editing application.

1. Open an image editing application
   • Use image editing applications such as Adobe Lightroom or Photoshop Express.
2. Select an image
   • Open the image whose resolution you want to check in the application.
3. Find out more information
   • Check the image resolution from the application's Advanced menu.

How to Increase DPI: Thorough Comparison of Free & Paid Tools

There are two main ways to increase the DPI of an image: using professional software and using easy-to-use tools.

It is important to choose the method that best suits your application and skill level.

First.PhotoshopFull-fledged image editing software such as

Highly flexible editing is possible, including resolution and size changes, cropping, and correction.

However, some knowledge is required to operate it, and beginners may find it difficult. Another disadvantage is the monthly cost.

On the other hand, recentlyImage quality enhancement tool using AI technologyis attracting a lot of attention.

For example, software like "4DDiG File Repair" which I introduced on YouTube before.

Simply upload the image and it will automatically increase the resolution.

The key point is that it is easy to use without special skills.

Some software also allows for processing of different types of photos, such as portraits and landscapes, and can be adjusted to suit the application.

Further explanations will be provided in more detail.

What is the difference between Photoshop and AI image enhancement software?

The main difference between image editing software and AI tools lies in "freedom of operation" and "ease of use. The following are points of comparison between the two.

1. freedom of operation

• Photoshopis finely configurable, allowing you to change the DPI value freely by yourself.
• Since AI tools are automatically adjusted, it is difficult to specify detailed numerical values.

2. corresponding image type

• Photoshop supports all image formats, but it can take time to learn how to use it.
• The AI tool supports all major image formats. So for many, this will suffice.

3. introduction and cost

• Photoshop is paid for and requires a monthly or annual subscription.
• Many AI tools have free trial versions and are relatively easy to implement.

Thus, Photoshop is suitable for those who want to make fine adjustments, and the AI tool is suitable for those who want a quick and easy finish without spending a lot of time.

What is AI-powered 4DDiG File Repair? Thorough Explanation of Functions and Usage

4DDiG File Repairis an all-in-one tool that uses AI technology to repair and enhance the quality of photos, videos, and other files.

In particular, the automatic enhancement of image resolution is a powerful feature that even beginners appreciate for its ease of use.

4DDiG File Repair Features

The software not only repairs damaged files, but also increases the number of pixels in old photos to make them sharper and adjust them to a size suitable for printing.

Not only does it support a variety of image file formats, but it also has the ability to process multiple files at once.

Easy to use even for beginners

It is very simple to use. After installing the application, simply drag and drop images and videos to start processing.

It is designed to be easy to operate, and is recommended for those who are not familiar with computer operation.

Supported OS

Supported operating systems are both Windows and Mac, and a free trial version is available for anyone to try.

Each of the AI models introduced later in this section can be used to achieve a more optimal result for your application.

How to choose an image resolution change tool for your smartphone or computer

It is important to choose the right tool to increase the resolution of an image.

Depending on the application and environment, you need to consider whether to use an online site or a software program that you install on your computer.

Another key factor in choosing the right one is whether or not it is compatible with smartphone operation.

Online Tools

The online tool can be used in a browser and is easy to use with no installation required.

For example, some services automatically increase the resolution with just a few clicks after uploading an image.

Since there is little distinction between mac and windows, it can be operated the same way on any device.

The Dangers of Free Online Tools

However, there are concerns about privacy and the fact that it depends on the communication environment.

Risk of uploaded image files being leaked, leaked, or divertedis not wiped out.

It may even be published in a form that can be seen by third parties.

dedicated software

On the other hand, software that is installed and used on a computer is often capable of higher precision processing.

When you want to edit a large number of images at onceIt is suitable for

It is recommended for those who are particular about their use, as it has many setting items and can be fine-tuned to meet their needs.

Recently, software that uses AI to automatically optimize the number of pixels in an image has emerged, which is particularly strong in improving the quality of photos and files.

Both types have their merits and drawbacks, so it is important to consider what situations you want to use them in and what functions you need, and choose the best method.

Online sites vs. dedicated software｜Recommendations by application

To decide which tools to use, consider organizing them by purpose.

When an online site is right for you

• When you want to temporarily change the DPI of an image
• When you want to operate easily from your smartphone
• When you want to use it without installation

When dedicated software is suitable

• When you want to edit multiple photos or jpeg files at once
• When you want to be particular about the finished product after editing
• When you want to work without an Internet connection

For example, AI-equipped software is more effective when you want to print photos at high resolution or when you want to correct dots so that they do not stand out.

Conversely, for minor adjustments and image changes for social networking, online tools may be sufficient.

In this way, the quality of the image can be naturally enhanced by choosing the best method for the environment in which it will be used and for what purpose it will be used.

How to use 4DDiG File Repair

Click here to see a video explaining how to use it.

Easy to use, no manual required.

How to Download & Install

Please download it for free to see if you can install it first.

Official Siteaccess to the

Then download the file from the top page.

After downloading the file, install it.

Wait a few minutes and the installation will be complete.

Once 4DDiG File Repair is launched, a menu appears.

AI Type of high quality image enhancement

Launch 4DDiG File Repair and press "AI High Quality" from the sidebar on the right side.

You can choose the type of image quality enhancement according to the file type and purpose.

• Video High Resolution
• High-picture quality
• Video colorization
• Photo colorization

Thus, it supports high quality video as well as images.

I'll explain how to improve image quality in this case.

Increase image resolution with 4DDiG File Repair

This time, we will test whether we can really increase the resolution of the image without discovery.

We have provided a video explanation. See below.

Let's increase the resolution of these three images.

General model

It supports a wide range of images, and even photographs that do not require any particular adjustments can be prepared with natural-looking results. It is suitable for improving overall image quality and automatically optimizing resolution.

Face-specific models

This model is specialized for portraits and portrait photography, and delicately reproduces details such as facial contours, eyes, and hair texture, making it ideal for beautifully finished photos for social networking and printing purposes.

Noise reduction model

This model is ideal for photos taken at night or in dark places. It suppresses unwanted particles and blurring in the image and converts them into a clear expression. It is particularly effective for images taken in low light.

By using these different AI models, we can not only increase the DPI, but also improve the perfection of the image quality itself.

By selecting the best mode for the new taught application, you will get more satisfactory results.

For those who want to increase the image DPI｜4DDiG File Repair fees, installation procedure, and discount information

Rate Plan Comparison

4DDiG File Repair is a useful software that uses advanced AI technology to improve the quality of images and videos. To begin using the software, you can first download a free trial version from the official website.

There are three types of fee plans: "Monthly," "Annual," and "Perpetual License," which can be selected according to the duration and frequency of use.

The monthly plan is suitable for those who want to use it only for a short period of time, while the perpetual license is suitable for those who want to use it for a longer period of time and make only one payment.

By the way, if you sign up for an annual plan, the perpetual license is a better deal.

How to use discount coupons

At the time of purchase, the "4DBD20OFFYou can get the software at a discounted price compared to the regular price by entering the coupon code "$0.99".

To apply the coupon, simply copy and paste the code into the input field on the purchase screen.

First, check the price plans on the official website▼.

30-day money back guarantee.

Step 1: Go to the Rates page.

Open the Rates page.

Step 2: Press the coupon entry area.

Locate the coupon entry area within the rates page and click on it.

Step 3: Enter the coupon code.

Enter the coupon code in the input field displayed and press the "Apply" button.

It's a very simple procedure and you can get it at a discounted price. Please give it a try.

How to Cancel Subscription and Support System

Cancellation of automatic renewal and post-purchase support is assured.

4DDiG allows you to cancel automatic subscription renewal at any time.

First, you can cancel by contacting Customer Service.

To contact usSupport Pageand fill out the form in the order from the top to send it to us, which will lead to support.

You will also receive an email notification from the payment platform before your subscription renews. You can cancel your subscription from there.

When canceling, remember to check your order number and registered e-mail address.

How to cancel using MyCommerce

If you are using the MyCommerce payment platform, you can also perform the cancellation operation yourself from your account.

Furthermore, the support team is ready to reply within 24 hours on weekdays and within 48 hours on holidays.

They also respond to inquiries in Japanese. I have discussed 4DDiG with them several times and it has been very smooth.

You can consult with us in Japanese in the event of cancellation of subscriptions or technical problems without worry.

Reasons for reliable introduction｜Money-Back Guarantee, Safety, and Reliability of Support

4DDiG File Repair is designed to be easy to implement, even for first-time users. We also have an extensive user support system that includes the following

• 30-day money back guarantee included
• Registration codes can be reset up to twice (e.g., when changing PCs)
• Support for permanent free updates after purchase
• Secure payment and malware-free design
• 24/7 Customer Service

If problems should occur, we have the peace of mind that they will be taken care of.

I actually used 4DDiG File Repair support and the support was very fast and courteous.

Frequently Asked Questions and Answers

What effect does increasing the DPI of an image have?

Increasing the DPI increases the fineness of the image, resulting in a sharper finish when printed. This is especially important for high-quality printed materials such as posters and business cards.

Also, low-resolution images lying around on your smartphone can be easily improved in DPI by using a dedicated application such as the one described in this article.

Which is better for beginners, Photoshop or AI software?

Photoshop is multifunctional, but its operation is somewhat complicated. It may be a little difficult to use until you get used to it.

AI software, on the other hand, automatically improves image quality simply by uploading images.

AI software is easier for beginners to handle.

Who is the operator? Is it safe, really?

4DDiG is a product of TENORSHARE, an IT company established in Hong Kong in 2007.

This software is used not only in Japan but also all over the world.

I actually installed it myself and verified it in detail. Naturally, no malware was detected and I have confirmed that there are no safety issues (research as of April 9, 2025).

Where can I use the coupon "4DBD20OFF"?

On the official website purchase page, enter "4DBD20OFF" in the "Coupon Code Entry Field" on the screen for confirming order details, and the discount will be applied.

Please take advantage of this before purchasing.

Summary｜4DDiG is the optimal solution in 2025 if you want to increase the DPI of images.

There are various means of increasing the DPI of an image.

4DDiG File Repair with AI satisfies these three requirements in a well-balanced manner: ease of use, beauty of the finished product, and reliability as a tool.

30-day money back guarantee.

Above all, it offers simple operation that is easy for even beginners to handle, and highly accurate image correction functions using a variety of AI models.

It also supports popular file formats such as jpg and jpeg, and can meet a wide range of needs from restoring old photos to creating high-resolution data for printing.

For those who want to make their images look natural and beautiful, and for those who want to improve the look of their printed materials, this is a definite tool of choice in 2025.

How to effectively increase the DPI (resolution) of an image: https://bit.ly/3RGe4Pk