Compress Photos Online

You might need to upload a bunch of photos to a website of yours but want to optimize them first. Perhaps, you need to send a lot of images over an email but attaching even three of them exceeds the size limit. Maybe, you simply want to post some photos to your social media without them looking somewhat blurry and unsharp. No matter which of these goals is yours, there is only one right answer – image compression.

If you are wondering what it is and how to compress a photo, keep reading, because that’s what this article is going to cover. Also, on this webpage, you can use our free online photo compressor that allows you to compress photos as quickly and easily as possible.


What is a File Size of an Image?

Before we dive into image compression, let’s cover some basics. Any file, including an image, has a size. A file size is measured in megabytes and kilobytes. There are 1024 kilobytes in 1 megabyte.

A size of an image depends on various factors:

  • Pixel dimensions. Your photos are composed of pixels. The bigger the number of pixels, the bigger will be the size of your image in megabytes. For example, a JPEG image with the pixel dimensions of 6000x4000 may have a size of around 10 MBs. If 150 pixels are removed from this image, then its size will be reduced by around 75 kilobytes.
  • Quality and details.The file size of your image is also determined by its quality. If your high-resolution photo has a lot of details and colors in it, it will be of a bigger size.
  • Format. More common formats like JPEG and GIFF will produce images of more manageable size than any of the raw formats. That’s because raw photos contain a lot more information.
original size before compress an image
compress photos online

Why You Should Compress Photos for Your Website?

Image compression is an integral part of optimizing visual content for web, because its main purpose is to substantially reduce the size of an image without compromising its excellent quality.

Image compression can be a great solution to several problems. First and foremost, you should never post high-resolution photos of a large size on your website, because they will take a long time to load and subsequently, slow down the loading speed of the entire webpage. People hate it when they have to wait for all the visual content to show up. If your website doesn’t load quickly, your visitors will go to your competitors, and you will lose your potential customers.

However, the smaller the file size of your images, the less space they will occupy on the server and the faster they will load. Therefore, it is essential to compress photos before publishing them on your website if you don’t want to keep your visitors waiting.

If you don’t compress photos before posting them online, you may encounter either of these issues:

  1. Webpages will take longer than three seconds to load, which will cause a lot of people to leave. This might lead to a drop in conversion rate of your website. Even if visitors have a strong internet connection, the large-sized images on your website won’t load fast enough. And if a person tries to open your website on their smartphone while using their mobile internet, it will be a nightmare – your website will load with the speed of a snail!

  2. Your website might “eat” your visitors’ traffic. Usually, loading webpages with large-sized photos can use up quite a lot of internet traffic. As a result, your visitors will lose their precious bytes just to load your website at an excruciatingly slow speed. In other words, they will get a bad customer experience.

You can also use photo compression to:

  • Free up space in the memory storage of a mobile phone, tablet, or computer.
  • Reduce the file size of images to send them by email, or upload them to social networks.
how to compress a photo
compress photo size

Where Can You Compress Photos?

A wide variety of image editors include the feature of image compression. You can use a complicated editing software that needs to be downloaded and installed on your computer. Alternatively, if you want something quicker and easier, you can use online applications. In both cases, it is important to choose proven, safe apps that guaranty the security of your data. That is, if you want to avoid the risk of infecting your computer with a virus or someone stealing your images from the app’s servers.

If you are looking for a user-friendly app that has an intuitive interface and works in a browser, look no further – it’s Visual Watermark. Our online photo compressor doesn’t need to be downloaded or installed.

All you have to do is open our website and go to the “Compress Photo” webpage. You won’t have to sign up or enter any data to process your images.

Some browsers and websites can compress images automatically when you upload them. But don’t get excited by this just yet. It’s actually not a great idea to import high-resolution images and let the browser/website do its thing. Automatic compression can result in photos looking unsharp, pixelated, and of bad quality.

Do you really want your photos that you spend so much time and effort on to look unappealing and unprofessional after you post them online? Probably, not. If you want to avoid this, compress your images with the help of a special app. For example, our photo compressor.

original size before compress
after using photo compressor

How to Compress a Photo in Visual Watermark

The “Compress Photo” tool allows you to process pictures in three popular formats – JPEG, PNG, GIF. When compressing your images, our app will do everything possible not to just reduce their size, but also preserve their best quality. It’s a truly great choice!

You can upload a batch of up to 10 photos in different formats. If you buy one of our three paid editions, you can compress even more images in one go!

Here you will see how to compress a photo in our app:

  1. Go to the online photo compressor at the top of this webpage. select images to compress
  2. Click on the “Select Images” button and pick one of the suggested options:
    • “From my computer”. If you choose this option, you will need to find the necessary folder and select the photos for uploading.
    • “From Google Drive, Google Photo, or Dropbox”. If you want to import images from either of the cloud storages, first, you will need to provide access to your account. Then, you can select and upload your photos.
    download images to compress Alternatively, you can drag images from a folder and drop them right into the app’s window.
  3. Choose how you want your photos to be compressed: choose the quality of photo compression
    • Better Quality. Our app will prioritize maintaining the quality of your images at the highest possible level.
    • Smaller Size. The app will apply stronger compression to your photos to dramatically reduce their size.
    • Specific File Size. You will be able to enter the number of kilobytes that you want your compressed copies to be.
  4. Click on “Compress Images”.

Our app is unbelievably simple and works super-fast. Your images will be compressed in little to no time.

Once our photo compressor is done with your images, you will need to download them to your device or a cloud storage account.


Types of image compression

You can compress photos with and without loss of quality. This solely depends on the type of compression. There are two of them – lossy and lossless. It’s also worth mentioning that one image format can support only one type of compression, but not the other. Let’s take a closer look at them.

Lossy compression is supported by JPEG.

  • When compressing JPEG photos, some redundant data is removed. This type of compression is called lossy because some loss of quality occurs no matter what. For this reason, if you apply really strong compression to your images, their quality will degrade drastically. But if you compress your images the right way, you won’t see much of a difference between the original and the compressed copy. Lossy compression can reduce the file size of an image by a lot.

  • Lossy compression uses the imperfection of the human eye to its advantage. You may not know this, but people pay more attention to the contrast between brightness and darkness than to the contrast between colors and nuanced hues. The way lossy compression works is it gets rid of similar-looking colors and some finer details but doesn’t change bright and dark spots. For this reason, you won’t see much of a difference in quality.

JPEG format is perfect for images that have a lot of details and color transitions. This is why it’s so widespread in the photography world.

Lossless compression is supported by PNG and GIF.

  • As you might have guessed from the name, there is no loss or degradation of quality in lossless compression. No redundant data is removed. The image is simply compressed; kind of like a zip-archive. Which is why, when lossless compression occurs, the file size of an image won’t be significantly reduced. Lossless compression is a fully reversible process, which means that you can restore your compressed images to their initial state, which is impossible with the lossy compression.

  • PNG is a format that is commonly used for digital graphics – logos, icons, images with a lot of text, etc. PNG images cannot be compressed to the same size as JPEGs – they will always be bigger.

  • GIF is used for files with animation. Even though, it’s a lossless format, GIFs are usually of more manageable size.

You can choose to process files in any of these formats – our app will do everything in its power to compress your images without a significant loss of quality. And you will be able to easily post them online or send them by email.


The Main Advantages of Working in Visual Watermark Photo Compressor

Thousands of people choose our photo compressor, because it allows them to process photos on their computer, tablet, or smartphone. If you don’t want to waste your time searching for editing software to compress just one or several photos, you can use our app, too!

Here are some of Visual Watermark’s advantages:

  • It’s unbelievably easy to work in our app.You don’t need to have any editing skills or understand minor aspects of photo compression. Our app knows what to do with your photos. Your job is simple - import your images and choose one of the compression options.
  • Our app is completely safe. It processes your files right in your browser. They will never reach our servers or get stored on them. We won’t have access to your images. They will always remain yours.
  • You can compress 10+ photos of different formats at the same time. There’s no need to process your JPEGs, PNGs and GIFs separately. You can upload all of them into our app as one batch. Even if you import hundreds of images, our app will take mere minutes to compress them.

Frequently Asked Questions (FAQ)

Here are the answers to the most popular questions about image compression.

How to compress a photo in JPG format?

JPEG is not just one of the most popular and wide-spread formats on the web, it’s also one of the easiest to compress. You can use nearly any image editor to do this, including our online application. With Visual Watermark, you will be able to compress your JPEG photos quickly and effortlessly – just upload your images, choose one of the three compression options and click the “Compress Images” button.

How can I compress a photo without losing quality?

You can compress an image in PNG, which is a lossless format. However, JPEG is more commonly used for photos. Unfortunately, it supports only lossy compression, therefore some loss of quality is inevitable. There’s no need to worry about it, though. Our app can compress your JPEG photos while keeping their quality as excellent as possible. All you need to do is select the “Better Quality” option before starting the compression process. You won’t see any difference between the original JPEGs and the compressed copies!

How many photos can I send by email?

If you don’t compress them, probably about 2-4. All mail services have a size limit on attachments. For example, in Gmail, your files shouldn’t exceed 25 MBs collectively. One high-quality JPEG photo can be around 10 or 15 MBs. But you can significantly reduce its size to a couple of hundred kilobytes by compressing it. After the compression, you will be able to attach dozens of images to one letter.

How to compress a photo to send by email?

You can use our online application! The free version allows you to upload up to 10 images in one go. And the app itself is easy to master. You simply need to upload your images into our app and choose what level of compression you want. In just a couple of minutes, you will have your images ready to be sent over email.

How to compress a photo on Windows 10?

If you have a Windows computer of any version or MAC, you can use our free Visual Watermark tool to compress a photo. It works online and doesn’t need to be installed. The app processes your images right in your browser. Once the compression process is done you can download your photos to your computer or one of the cloud storages.

How to downsize a photo without losing quality online?

If you want to reduce the size of your images without a significant loss of quality, you can compress them in our web-based image compressor. Our online app works on all devices, including smartphones. To preserve the quality of your images as much as possible, select the “Better Quality” option before the compression begins. Your compressed images will look crisp and sharp.

How to compress an image on an Android smartphone?

With our browser-based image compressor, of course! It works on both iOS and Android smartphones and tablets. The only thing you’re going to need is Internet access. You won’t have to download or install anything. To compress your images, open your mobile browser, go to our website and open the “Compress Photos” webpage. Import your image into the app, select one of the compression options and start the process. All done! Easy, isn’t it?

Our website has a mobile version which is pretty much identical to the desktop one. You will have no difficulties using our image compressor on any device. However, if you want, you can read our step-by-step instructions on how to use the app. They are in this article.


Make use of our other apps!

The “Compress Photos” app is not the only online tool that our website has to offer.

On our website, you can also:

  1. Add a watermark images to protect them from being stolen or promote your brand.
  2. Add a watermark to the video to avoid copyright infringement.
  3. Crop images into a circle/rectangle as well as use one of our ready-made templates.
  4. Resize your images by entering the necessary number of pixel dimensions.
  5. Add any text to a picture. For example, a quote, a poem, or any other message.

Each of our online tools has an intuitive, ad-free interface that is easy to understand. It won’t take you long to master all of our apps! Visual Watermark will help you protect and edit your images as well as optimize them for web – fast and without much effort.


Visual Watermark Photo & Video Editing Tools