Are the images downloaded online blurry when enlarged? Or do you worry about poor results when printing low-resolution old photos? Traditional stretching and enlargement only make images blurrier; cropping only magnifies a small part of the entire image without changing the pixel data of JPG or PNG files. Moreover, with hundreds or thousands of low-resolution images, not only can we not find a way to enlarge them, but even if we do, we'd have to process them one by one. Wouldn't that waste our entire day or even the next several days on enlarging image resolutions?
Fortunately, today's technological development is very powerful. Here we share several practical tools and methods to effectively improve the resolution and clarity of images, enlarge small-resolution images, and highlight the details of the images.
When should you enlarge the resolution and pixels of various image formats like JPG and PNG?
When the image is used for large-size display
Images we save online often have relatively low resolution, such as small images of 200x200 or 400x300. Directly transferring an image of this size to a phone, inserting it into a PPT, or printing it will make it very small and unclear. At this time, improving the resolution is needed to achieve better visual effects when enlarged for presentations or printing.
When a tidy layout is required in the design
During layout and design, even if the image itself doesn't need to be particularly clear, image dimensions need to be uniform for visual consistency. If a group of images needs to be displayed in the same row, but one image is especially small, you have to enlarge its resolution to match the size of the other images, avoiding large and small inconsistencies and visually ensuring a neat layout.
When the upload platform requires a minimum dimension
Some systems and platforms have a minimum size limit when uploading images. If the original image is small, even if the content is complete, it cannot be uploaded if it doesn't meet the size requirements. We can increase the resolution or pixel count to make the image meet the platform's requirements. Although enlarging won't improve image quality, it at least allows for a successful upload and passes review, meeting the basic specifications of the system.
Preview of the effect of batch enlarging JPG, PNG, and other image sizes
Before processing:
After processing:
Method 1: Use HeSoft Doc Batch Tool to batch enlarge the resolution of small images
Recommendation Index: ★★★★★
Pros:
- Hundreds or thousands of images can be easily enlarged, without processing them one by one. It also supports shrinking images, adjusting image rotation angle, transparency, brightness, contrast, etc.
- No image upload is required; all processing is done on the local computer, focusing on user privacy and security.
Cons:
- The software can only be installed and used on a computer.
Steps:
1. Open [ HeSoft Doc Batch Tool ], select [Image Tools] - [Image Effect Enhancement].
2. In [Add files] or [Import files from folder], choose a method to add the images you want to enlarge. You can also directly drag and drop images in, then click Next.
3. Go to the settings options page, turn on the [Enlarge or Shrink] button. Drag the slider below to the left or right, supporting both enlargement and shrinking. Finally, click Next to go to the save interface, click Browse, and choose the save location for the enlarged images.
4. After the processing is complete, click the red path to open the folder and view the successfully enlarged images.
Method 2: Use the Bigjpg enlargement tool to increase JPG and PNG image sizes
Recommendation Index: ★★★☆☆
Pros:
- No software installation is needed; just open a browser with an internet connection.
- Supports multiple formats and has AI to supplement pixels, resulting in excellent enlargement quality and effects.
Cons:
- Needs to upload images to the server; using sensitive image files is not recommended.
- High-quality enlargement may have some limitations and requirements.
Steps:
1. Open your browser and visit the Bigjpg official website, click to select an image or drag and drop an image onto the upload area.
2. Here you can choose the magnification factor, options are 2x, 4x, 8x, 16x. Select a suitable option.
3. Click Start, then wait for the processing to finish and you can save the high-definition large image.
Method 3: Use the computer's built-in Paint tool to batch enlarge the pixels of JPG and PNG images
Recommendation Index: ★★★☆☆
Pros:
- Completely free, usable without internet connection. All operations are processed locally and offline.
- Easy to operate, with intuitive display of the resulting image effect and quality.
Cons:
- Uses the most basic algorithm, resulting in relatively blurry image quality after enlargement.
- Only suitable for minor enlargements of image size.
Steps:
1. Right-click the image file and open it with the Paint tool.
2. On the Home tab, select Resize, then in the pop-up window choose the Pixels mode.
3. Enter larger values for Horizontal and Vertical as needed (for example, if it's 320x240 here, we change it to 960x720).
4. Finally, click OK, the image is enlarged instantly. However, forcing a stretch will cause a noticeable loss of image quality, then save it.
