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What is an image file size?

Images are composed by several dots called pixels, and each of them has a color, represented as a combination of three basic colors (red, green and blue). To store each of these pixels, 3 bytes (24 ones or zeros) are generally used. When an image is large, it may have millions of pixels, and that means storing all information for an image like that in a computer or any device will take millions of bytes.

When a camera or cellphone says it takes 10 megapixels photos, it means that each photo has 10 million pixels (mega = million). And having 10 million pixels means it takes 30 million bytes (or 30 megabytes) to store that photo (which is a lot of space!). If you want to send this photo (or many photos) to a friend by e-mail, it will have to transfer 30 megabytes of data and it will take a while to upload it and a lot for the recipient to download it later.

Using our free image resizer you can make your images and photos much lighter and easier to share and upload to your favorite websites.

How can I reduce my image

One way is compressing the image, which reduces file size without having to resize it. Image quality will suffer as you increase compression and start losing more data.

Another method is to resize your photo, decreasing the pixels it takes to store the image. Reducing image size doesn't reduce image quality, although it may lose small details.

Photos from modern cellphones and cameras usually have over 6 million pixels, while most cellphones, tablets, notebook or TV screens have only about 1.5 million pixels, which means you end up seeing a resized version of the image (you only use the full image if you print it). So if you resize your image, decreasing its width and height to a half, your image would have about the same number of pixels as the screens that will display it, and you wouldn't be losing any quality or detail, even looking at your image in full screen mode.

If you have a huge photo, we recommend resizing it to about 1900 by 1100 pixels, with JPG format and 90% quality. You will get a versatile image with great quality, that you can send to anyone without taking too much time.

Why is my photo so heavy?

When a photo is taken with a camera, the camera's sensor captures the light and color information and converts it into digital data. This data is then compressed and saved as a file, typically in the JPEG format. The file size of the photo is determined by the amount of data that is captured and saved in the image.

Resolution is one of the main factors that determine the file size of a photo. The higher the resolution, the more pixels are captured in the image, and the larger the file size. For example, a photo taken at 12 megapixels will have a larger file size than one taken at 8 megapixels.

Another factor that can affect the file size is the amount of detail captured in the photo. If the image has a lot of fine details, such as intricate textures or patterns, it will require more data to be saved, resulting in a larger file size.

Additionally, the number of colors used in the photo can also affect the file size. Images with a lot of colors, such as photographs of nature or landscapes, will require more data to be saved, resulting in a larger file size.

Lastly, if the photo was taken in a high-resolution mode or with a lot of editing applied, this can also increase the file size. These editing tools and special effects can add extra data to the image, making it larger.

In summary, the photo you took might be heavy in terms of file size because of the high resolution, the amount of detail captured, the number of colors used, and the amount of editing applied to the image.

With our free image resizer you can get much lighter images that you can easily share or upload.

Why should I use Reduce Images?

Our image resizing tool is an excellent choice for users who need to adjust the size of their images without compromising on quality. Here are a few reasons why:

1 - It's free: Our image resizing tool is completely free to use, which means users can resize their images without having to pay any additional costs.

2 - Easy to use: Our image resizer is designed with a user-friendly interface that makes it easy to navigate and adjust the size of images. Users can simply select the image they want to resize, adjust the size, and save the changes in a matter of minutes.

3 - Completely offline: One of the major advantages of our image resizer is that it can be used completely offline. This means that the images never leave the user's computer, which is especially important for users who need to resize sensitive data like passports, driver licenses, or IDs.

4 - High-quality output: Our resizing tool uses advanced algorithms to resize images without compromising on quality. This means that the final image will retain its clarity, sharpness, and resolution, making it suitable for use in a variety of applications.

5 - Versatility: Our image resizer is versatile and can be used to resize images of any type, including JPEG, PNG, GIF, and BMP.

Can anyone see the photos I resize?

Our image resizer is a browser-based application that works entirely offline. This means that users can resize their images without having to connect to the internet or upload their images to a remote server. This feature makes it an ideal option for users who need to resize sensitive images like passports, driver licenses, or IDs.

The tool is based on a JavaScript resizing algorithm that allows it to work locally on the user's device. This means that the image is processed and resized within the browser, without the need to send the data to a remote server. This also means that users don't have to worry about the security of their data as it never leaves their device.

The algorithm uses advanced techniques to resize images without compromising on quality. It maintains the clarity, sharpness, and resolution of the original image, even after the size has been adjusted. This ensures that the final image is suitable for use in a variety of applications, including online forms, social media, and print materials.

What is included in the paid plans?

Our image resizer comes in both a free and a paid version. Both versions offer the same high-quality resizing capabilities, but the main benefits of the paid version is the ability to resize multiple images at once.

This feature allows users to process batches of large images in one go, saving time and effort. This is especially convenient for users who have a large number of images to resize, such as photographers, graphic designers, or businesses that need to resize a lot of images on a regular basis.

All our paid plans offer the same capabilities, but for different time periods. One of the benefits of buying a longer period plan is that it offers a cheaper price per month. For example, buying a six months plan is 50% cheaper than buying a one-month plan six times in a row. This can be a cost-effective option for users who plan to use our photo resizer regularly or for a longer period of time.

Additionally, buying a longer period plan also gives the user the flexibility to use our image resizer at their own pace, without having to worry about renewing their plan frequently.

If you are planning to use our image resizer in the long term and don't want to worry about renewing your plan every 6 months, you can choose a monthly subscription plan, which saves you 20% each month compared to the "Simple" 1-month plan.

Useful volcabulary and definitions for photo resizing

- Image resizing: The process of changing the dimensions of an image by adjusting the number of pixels in the image.

- Pixels: The tiny dots that make up an image. The more pixels an image has, the higher the resolution and the larger the file size.

- Resolution: The number of pixels in an image. A higher resolution image will have more pixels and therefore a larger file size.

- Compression: The process of reducing the file size of an image by removing unnecessary data. Different file formats, such as JPEG and PNG, use different types of compression to reduce the file size.

- File format: The type of file that an image is saved in. Different file formats, such as JPEG, PNG, and GIF, have different capabilities when it comes to image file size.

- Aspect ratio: The ratio of the width to the height of an image.

- Crop: The process of removing parts of an image in order to adjust its aspect ratio or focus on a specific area of the image.

- Scaling: The process of changing the size of an image by adjusting the number of pixels in the image.

- Interpolation: The process of adding pixels to an image in order to increase its size.

- Resampling: The process of adjusting the resolution of an image by removing or adding pixels.

- Lossless compression: A type of compression that reduces the file size of an image without losing any of the original image data.

- Lossy compression: A type of compression that reduces the file size of an image by discarding some of the original image data.

- DPI (Dots per Inch): A measure of the resolution of an image.

- Batch Processing: The process of processing multiple images at once.

- Algorithm: A set of instructions used to perform a specific task, in this case, image resizing.

How do I resize an image to print it in a specific size?

To resize an image to a specific printing size using our image resizer, you need to first select the units you want to use (centimeters or inches). Then enter the width and height you want to use. For example if you want to print an image with 4 inches width and 6 inches height, you would select "inches" and then enter 4 in the width form field, and 6 in the height form field.

To determine the quality of the printed image, you can change the Resolution (DPI) field too. Using 300dpi is generally the required resolution for professional printing of photos, flyers, marketing materials, etc, as it produces sharp high quality pictures.

In the previous example, using 4x6 inches, and 300dpi, the resized image dimensions would be 1200 x 1800 pixels which means over 2 million dots will be used to print the image in those 4x6 inches, resulting in a lot of detail.

Get your photos and images ready to print with our free image resizer.

What does DPI mean?

DPI stands for "dots per inch" and is a measure of the resolution of an image. It refers to the number of dots or pixels that are printed in one inch of an image. The higher the DPI, the more pixels there are in a given area, and the higher the image resolution. The concept of DPI is commonly used in printing, where images are reproduced on paper or other materials.

The DPI value is a critical factor in determining the quality of an image when it is printed. A higher DPI value will generally result in a more detailed and sharper print, while a lower DPI value will result in a more pixelated and blurry print. A DPI value of 300 is generally considered the standard for high-quality printing, but the ideal value can vary depending on the intended use of the image.

It is important to note that DPI and image size are not the same thing. Image size is the physical dimensions of the image in inches or centimeters, while DPI is a measure of the amount of detail in the image. For example, an image that is 4 inches by 4 inches at 300 DPI has a higher resolution than an image that is 4 inches by 4 inches at 72 DPI.

How does the JPG image format work?

The JPG (also known as JPEG) image format is one of the most widely used image formats on the internet. It is a lossy compression format, which means that some data is discarded in order to reduce the file size. This can result in a decrease in image quality, but the compression also makes it easier to store and transmit images.

The JPG format was first introduced in 1992 by the Joint Photographic Experts Group, hence the name JPG. It was designed specifically for compressing photographic images, and it is optimized for images with a lot of color and detail. The compression process works by analyzing the image and removing certain data that is deemed unnecessary. The amount of data that is removed depends on the compression level that is selected (named "Quality" in our image resizer).

One of the key features of the JPG format is that it is able to compress images to a relatively small size without sacrificing too much quality. This is achieved through a process called chroma subsampling, which reduces the amount of color information in an image. The human eye is less sensitive to changes in color than it is to changes in brightness, so chroma subsampling is able to remove some color information without significantly affecting the overall image quality.

The JPG format is also able to achieve a high level of compression by taking advantage of the fact that neighboring pixels in an image are often similar in color. It uses a process called discrete cosine transform (DCT) to analyze blocks of pixels in an image and remove the high-frequency components that contribute less to the overall image quality. The result is a more compact representation of the image data, which can be further compressed using a variety of algorithms.

One of the downsides of the JPG format is that it is a lossy compression format, which means that some data is discarded in order to achieve a smaller file size. This can result in a decrease in image quality, particularly if the compression level is set too high. Once an image has been compressed in the JPG format, it is not possible to recover the original data that was discarded.

Why are JPG images lighter than PNG images?

JPG (Joint Photographic Experts Group) and PNG (Portable Network Graphics) are two popular image file formats, and there are some fundamental differences between the two which explain why JPG images are lighter than PNG images.

JPG images are compressed using a lossy compression method that discards some of the information from the original image. This compression method works well for photographic images, as it can reduce the file size significantly while still maintaining a visually acceptable level of image quality. However, the degree of compression can be adjusted, and higher levels of compression will result in lower image quality, including visible artifacts like compression artifacts, noise, and blurring.

On the other hand, PNG images use lossless compression, which means that they maintain all the original data and do not discard any information. This results in higher-quality images, but the file sizes are typically larger than those of JPG images. The compression algorithm used in PNG images is called DEFLATE, which is a variant of the Lempel-Ziv-Welch (LZW) compression algorithm. PNG images also allow for transparency and alpha channels, which can add to the file size.

Another factor that contributes to the lighter file size of JPG images is the color depth. Most JPG images use 8 bits per color channel, which means that there are 256 possible color values for each red, green, and blue channel. In contrast, PNG images can use 8, 16, or 24 bits per color channel, which means that they can represent a much larger range of colors. The increased color depth of PNG images means that they can be used in applications that require higher color accuracy, such as graphic design or scientific imaging, but they also result in larger file sizes.

If you have a PNG image but you need to convert it to JPG format to make it lighter, you can use our image resizing tool, selecting 100% size to keep the original size, and selecting JPG as the output format. You will also be able to select a quality percentage which determines the quality but also the file size of the resized image.

What is an image resizer?

An image resizer is a tool or program that allows you to change the size of an image. Typically, it works by changing the number of pixels in an image, either by adding or removing pixels to make the image larger or smaller.

Image resizers are commonly used to make images smaller so that they take up less disk space, load faster on web pages, and are easier to share or send via email or messaging apps. They can also be used to make images larger, although this can result in a loss of image quality, especially if the original image is small or has a low resolution.

Some image resizers are standalone programs that you install on your computer, while others are web-based tools that you can access through a browser. Some image editing software, such as Adobe Photoshop or GIMP, also include built-in image resizing tools.

Most image resizers allow you to set the desired size of the image, either in pixels or as a percentage of the original size. Some also include options for maintaining the aspect ratio of the image, which can prevent the image from becoming distorted or stretched when it is resized. Additionally, some resizers may offer other features, such as the ability to change the file format, or adjust the image quality or compression settings.

Overall, an image resizer is a useful tool for anyone who needs to change the size of an image for any reason, whether it's to save disk space, share images online, print them or create images for use in a website, app, project or presentation.

Our free image resizer provides all those features directly on your browser, without the need to download or pay for any tool.