Compress JPG Online

Compress your JPG / JPEG images for free online without losing quality with compress-image.net

You can select up to 50 images in JPG or JPEG format by selecting them from your folders or by dragging them directly into the designated drop zone. You can beforehand choose the compression rate and the output image format. Once the images are selected, please wait until the end of the compression and/or conversion.

You can then readjust the compression quality of individual JPEG images by clicking on each thumbnail.
It is possible to download the compressed images one by one or together in a ZIP archive.

How to Compress a JPEG Online?

Our JPEG compression tool is free, easy to use and requires no software download. You do not need to sign up and there are no watermarks. You can use this tool as often as you want to compress your JPEG images.

  1. Select the compression rate you want for your jpg images before you start uploading online:
    • Best quality: A slight compression rate will be applied to your jpg image to prioritize image quality above all!
    • Best compression: By default, the compression rate applied to your jpeg images; a compromise to have significant compression while keeping an acceptable image quality.
    • Choice of compression rate: It's up to you to choose the compression rate between 1 (image with the highest compression rate) and 100 (no compression) and adjust the ideal rate to find a balance between image quality and image weight.
  2. Upload the JPEG files you want to compress by clicking the « ADD IMAGES » button; You can also drag and drop files into the designated drop zone.
  3. Please wait a moment, while your jpg images are processed and compressed with the previously selected rate. Once an image is compressed, you can see the compression rate on the thumbnail as well as the percentage of storage space savings after compression for each image; By clicking on an image, we also see the weight before and after compression.
  4. Adjust the compression rate if you wish for a specific image, click on the image and use the quality slider to adjust the rate to your liking. When you are satisfied with the compression and image quality, click the « OK » button to validate the modification (you can also change the compression of all jpg images by changing the compression rate and pressing the « REFRESH » button).
  5. Download your JPG images by clicking the « DOWNLOAD ALL IMAGES » button to download a ZIP archive containing all the compressed images when you are satisfied with the compression and quality of each image. If you prefer, you can also download each image individually by clicking the « DOWNLOAD » button on the corresponding image thumbnail.

If you wish to compress JPG images online again, you can delete the existing images and start the process over by clicking the « DELETE ALL » button. Thanks to our JPEG compression tool, you can quickly and easily reduce the size of JPEG files while maintaining optimal image quality. It is perfect for graphic designers, photographers and website owners who want to reduce website load times without sacrificing image quality.

Why compress a JPEG?

Compressing a JPEG image allows you to reduce the file size while preserving an image quality that remains visually acceptable; There are several reasons why you would want to compress a file in JPEG / JPG format:

  • Save Space: The main reason is to reduce the size of the JPG file to save storage space on your hard drive or on your web server (for webmasters). JPEG compression also allows you to store more images on mobile devices (smartphones, tablets..) that typically have limited storage space (with significant cost for adding additional space).
  • Faster transfer and sharing: JPEG compression also allows for rapid image transfer over the internet, as the files are smaller and therefore take less time to upload; This is particularly useful for websites that display many images, such as image galleries.
  • Speed up webpage loading: Reducing the weight of web pages to allow jpg/jpeg images to load more quickly this is particularly important to improve the performance of websites and apps that need to have a responsive site for both SEO and a more enjoyable user experience.
  • Preserve bandwidth: Compressing jpeg images can help some webmasters to reduce the amount of data you use and thus preserve bandwidth allowing for more simultaneous connections!

In summary, JPEG compression is useful for saving storage space, speeding up the transfer of images on the Internet, improving the performance of websites and apps, and allowing for the storage of more JPG images on mobile devices.

JPEG Image, what is it?

A JPEG (Joint Photographic Experts Group, the name of the group that created this format) or JPG image is a type of digital file reference for digital images; other formats than jpg or jpeg were once used such as: .jpe, .jfif, .jfi and .jif.

The JPEG file format is the most widely used in the world, compatible on all web browsers and capable of displaying more than 16 million colors while being small in size, making it a very popular and used format for photos and digital images for the web.
The JPEG file uses lossy compression to facilitate the storage and sending of images, allowing to reduce the size of the JPG file; this means that some information is deleted during compression but without necessarily sacrificing the visual quality of the image.

JPEG images can be opened and displayed on most computers and mobile devices using standard image viewing programs.

Why use the JPG format?

The JPEG image format is often used for these reasons:

  • JPG format compatibility: The JPEG format is compatible with many software and basic image viewing programs on all operating systems, also compatible with all web browsers making it a practical choice for displaying and sharing images.
  • Effective JPEG compression: The JPEG image uses lossy compression to reduce the size of image files, which is important for saving storage space, while maintaining an acceptable image quality.
  • Image quality: The JPEG format supports 24-bit colors, a wide range of colors making it an ideal choice for photos with rich and varied colors. A JPEG file can display more than 16 million colors for a relatively small size making it one of the most used image file formats in the world.
  • Transfer speed: The JPEG format, with a smaller size than other image formats at an equal visual quality, allows for the quick transfer of images over the internet. This is particularly practical if you need to send or share a large number of images online.

Advantages and Disadvantages of the JPG format

What are the advantages of the JPEG format?

  • Space saving: Uncompressed images can take up a lot of space on your hard drive or web server. Thanks to JPEG compression, these files can be significantly reduced in size; JPEG compression can reduce the size of files up to 10 times compared to the original size.
  • Satisfactory visual quality: JPEG compression uses a lossy compression algorithm, which removes some information from the image in order to reduce the file size. In general, these losses in quality are almost invisible to the naked eye until a certain level of compression.
  • Faster loading time: The small file size of JPEG means that JPG images load faster on websites, social networks and mobile apps. Users are also more likely to stay on a responsive site offering a better user experience.
  • Easy to use: Images in JPEG format are compatible with most image editing software, web browsers and mobile devices; This makes JPEG images particularly convenient for sharing (sending by email, sharing on social networks, online upload..) and viewing.
  • Quality control: Our online JPG compressors allow you to adjust JPEG compression settings thus allowing you to find a balance between the visual quality of the image and the file size. By modifying these compression settings, users can increase or decrease the file size according to their needs.

What are the disadvantages of the JPEG format?

  • Loss of quality with excessive compression: Loss of quality with excessive compression: The JPEG format using a lossy compression therefore removes data to reduce the size of the jpg image; Although JPEG compression is designed to minimize loss of visual quality (up to a certain % of compression), some loss of information can lead to a degradation of the image quality (loss of visual quality especially noticeable on areas of fine details or color gradients).
  • Not suitable for images with transparency: Transparency is not supported by the JPG image format, all pixels containing areas of transparencies will be replaced by a background color; It is therefore preferable to use formats compatible with transparency such as the PNG format.
  • Not recommended for small formats: Small size images such as icons should not be in .jpg: the smaller the image, the more visible the loss of quality due to compression; The jpeg format also has trouble handling sharp edges and high color contrasts without creating visible compression artifacts (the PNG, SVG, GIF formats are to be preferred for icons).
  • No support for animations: Unlike formats like GIF, JPEG does not support animations.

How does JPEG compression work?

We know that JPEG compression allows us to reduce file sizes using a lossy compression method, meaning that some image information is removed, but how does all this work?
The JPEG image is analyzed and areas with little visual information are identified and it's these areas that will be more compressed than areas with a lot of detail, which allows us to maintain an image quality good enough for the human eye (by defining an acceptable compression rate) while saving on storage space. However, be careful, a too high compression rate can lead to a loss of image quality, making your .jpg files unsuitable for certain uses, (professional printing, image editing..).

Is JPEG File Compression Safe?

Our online JPEG compression tool is completely safe, our servers are secure, automated, and all your photos/images remain private: nobody can see the files that you upload or compress. All your photos and images are automatically and permanently deleted from our servers as soon as you press the « Delete All » button or when you delete the images individually by pressing the cross available on each image. If you do not delete your images yourself, they will automatically be deleted from our servers after 2 hours.

jpg
50