Image Alt Text Best Practices: How to Optimize Your Images for SEO

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When it comes to search engine optimization (SEO), images are often forgotten. However, optimizing your images is a key part of improving your website’s ranking on search engines.

If your website relies heavily on visual content and the search engine spiders are still not able to index your images, you may be missing out on a huge amount of valuable traffic. There is a lot of image optimization best practices you can use in order to make sure that your images are properly indexed and provide some SEO benefits.

In this article, we will discuss the importance of image alt text and provide some image alt text best practices for optimizing your images.

What is image alt text?

Image Alt Text

Image alt-text is a brief description of an image that appears when the image is not loaded. It is also known as alternate text. The alt text helps people with visual impairments understand what the image is, and it also helps search engines understand what your images are all about.

Imagine it as a backup text that provides some context about what your image is for those who have images blocked or turned off by default.

Why image alt text is important?

When you upload images to your website’s gallery section, images, including text alternatives or alt text is important. This is especially important for screen reader users and those with impaired vision. The alt text will be read aloud by the screen reader when the image is displayed, so it’s important to include a brief description of the image.

For example, if you upload a photo of a cat, your alt text might say, “A black cat sitting in a garden.” This gives the reader some idea of what they’re looking at, even if they can’t see the image.

It’s also important to use appropriate keywords in your alt text so that search engines can index your images correctly. Including keywords in your alt text can help improve your web image searches ranking improve in order to show on the first page of the Google images search results page.

Image Alt Text Best Practices

Since the early days of the web, image alt text has been used to help those who have visually impaired with screen reader software access information on the web. Today, it is also used by search engines to help users find what they are looking for. In order to make sure your images are accessible and help improve your website’s search engine ranking, follow these best practices for image alt text.

dos and dont of writing alt tags


  • Include main keyword(s) – Image alt attributes is a great way to provide users with important information about your website. Keywords should be included in the alt text to help improve your search engine ranking.
  • Don’t stuff your keyword into the image alternative text of every single image – When using a keyword in your image alt text, it is important not to put the same word or phrase into every image. Although this may seem like a great idea at first, it will only lead to confusion and frustration for users with visual impairments.
  • Include your keyword in at least one of the images in your blog post if it contains a series of images.
  • If your article’s heading starts with a question, use the main word or phrases as Image Alt Tags.
  • The filename of the image should be the same as the alt text. This will provide a solid impact on image search. You can also include the keyword in the file name of your image. Avoid using “alt” in the filename, and although this is a common practice, it should be avoided.
  • Embed location to your Images – Adding location data to your images can be a great way to improve your local SEO. The GeoImgr tool makes it easy to embed location data into your images. Just enter the address or coordinates of the location you want to include and the tool will add the information to your image file. This can help potential customers find your business on Google Maps and other search engines.


  • Do not use the word “image” as an Image alt tag – This is a very common mistake. Do not use the word “image” as Image Title – The title of the image should be descriptive that best describes the image and make sense.
  • Do not use the word “company logo” as your image alt tag  – Although this is a common practice, it should be avoided. Instead of using just the “word company logo” as alt text, it’s better to include your company name to make it more decent.
  • Using incorrect spelling or punctuation as Image alt text –  It is recommended to use correct spelling and punctuation. Using incorrect spelling or punctuation as the Image title gives search engines a bad impression of your website.
  • The use of the same text in both the caption and the image alt text – Captions and alt attributes are both important for accessibility, but they should not be the same. The alt text should describe what is in the image, while the caption can add more information about the relation of the image alt text to the image.
  • Don’t use emojis as Image Alt Text. Emojis are often used to describe something or show emotion, but this is not what people with visual impairments see.

How does Alt Text Affect SEO?

Alt-text is a great way to add accessibility function to your website and improve your site’s SEO. By adding alt text to all of your images, you are providing a text alternative for those who cannot see the image. This also helps those who are using a screen reader to navigate your website. Alt-text is also a great way to include keywords in your website’s content. When you add alt text to an image, be sure to include relevant keywords that describe the image. This will help improve your site’s ranking in search engine results pages (SERPs).

How do I write good Image Alt text?

Are you looking for ways to improve your website’s accessibility? One great way to do this is by adding good alt text to your images. Alt-text is the text that is read aloud by screen readers, and it’s important to make sure it makes sense and includes the main keywords for the image.

Adding alt text is easy – just type it in the box when you’re uploading or editing an image. Keep in mind that alt text should be a brief summary of what the image is about, not a full description. Also, make sure to use keywords that are relevant to your page – this will help improve your site’s search engine ranking.

Adding alt text can also be helpful for people who are visually impaired. By adding descriptive alt text, they’ll have a better idea of what the image is and what it represents.

How long should alt text be for images?

image alt text

Adding alt text to images is important for many reasons, one of which is that it makes your images more accessible to people who are visually impaired. But how long should your alt text be?

According to Google, the recommended length for alt text is “5-8 words or less”. This is because shorter alt text is easier to read and understand. However, you can go over this limit if necessary, as long as you keep it succinct and relevant.

No matter how long your alt text is, it’s important to make sure that it accurately describes the image. Don’t just use generic phrases like “image” or “picture”; be specific about what the image contains. This will help ensure that users get the most out of your images.

Should all images have alt text?

Yes, it is important for all images to have alt text. Not only does it help with Google image SEO search improvement, but it also provides a better user experience for those who are visually impaired. Alt text should be brief and descriptive, giving the reader a sense of what the image is about.

Does alt text have to be unique?

Alt-text is an important part of creating a successful website, but does it have to be unique? The answer is yes. Google images result for a particular keyword can be greatly influenced by the alt text accompanying the image. If you are using the same alt text for multiple images, you run the risk of your website not appearing as high in the search results as it could. Creating unique alt text for each image on your website is essential for getting the most out of your site.


Using alt text for images is an important way to improve the accessibility of your website for people with disabilities, as well as for search engine optimization. It is also a best practice to use alt text that accurately describes the image. By following these alt text best practices, you can create an accessible and search engine-friendly website.

If you enjoyed this article, please consider sharing it. If you have questions, please do not hesitate to comment them down below, and we will be glad to answer all of them. Thank you very much for your time.

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Alvin Silang

Alvin is is an SEO expert in the Philippines who has helped many business owners in growing their site visibility on the Google search engine. If you need a freelance writer, or you need his SEO expertise, you can contact him at and you can find him on Fiverr.

This Post Has One Comment

  1. Global Trucker

    I wrote similar article about alt tag in transport industry. The best practice is to use high CTR alt description and use image as a link

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