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September 18, 2024

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What is cache and how do I clear it?

When we browse the web, our devices automatically store data from the websites we visit. This is called cache. Cache helps improve our online experience by making websites load faster. However, over time, cache can build up and often cause problems. In the following blog post, we will explore what cache is, how to clear it, and the advantages and disadvantages of using cache.

Hvad er cache og hvordan rydder jeg den?

What is caching?

Cache is a temporary storage of data that allows websites and apps to load faster on subsequent visits. When you visit a website for the first time, your device stores elements such as images, scripts, and layout in its cache. The next time you visit the same page, your device doesn’t have to fetch all the content from the web again, resulting in faster loading times. However, cache can sometimes lead to problems, such as outdated pages or errors in displaying content. This is why it’s important to know how to clear your cache.

How do I clear cache?

It varies from operating system to operating system, and browser to browser, how to clear your cache. Here we provide specific examples of how to clear your cache on both Windows and Mac using the Google Chrome browser: 

Chrome + Macbook

  1. Open the Chrome browser.
  2. Click on the three dots in the upper right corner and select “Settings.”
  3. Scroll down and click on “Security & Privacy.”
  4. Click on “Clear Browsing Data.”
  5. Check “Cached Images and Files” and click on “Clear Data.”

Bonus: You can also press control + command + r

Chrome + Windows

  1. Open the Chrome browser.
  2. Click the three dots in the upper right corner and select “Settings.”
  3. Select “Privacy and security.”
  4. Click “Clear browsing data.”
  5. Check “Cached images and files” and tap “Clear data.”

Bonus: You can also press ctrl + shift + r

What are the benefits of clearing cache?

  1. Free up storage space: Over time, cache can build up and take up a significant amount of storage space on your device. For those with limited storage space, especially on smartphones and tablets, this can be a problem. Clearing the cache frees up this space, which can help improve the overall performance of your device.
  2. Fix technical issues: Cache can sometimes be the cause of a number of technical issues. For example, if a website is not loading properly or if the content seems outdated, it could be due to a corrupt or old cache. Clearing the cache can often resolve these issues, as your browser will retrieve the latest version of the page directly from the server.
  3. Improves speed: While caches usually make websites load faster, an overcrowded cache can actually have the opposite effect. When the cache is filled with too much data, it can take longer for the browser to find the relevant files. Therefore, clearing the cache can optimize your browser and potentially experience faster website loading times.
  4. Protects your privacy: Caches can contain traces of your online activities, including which websites you have visited and which files you have downloaded. Clearing your cache removes this data and protects your privacy, especially when using a shared or public device.
  5. Avoids conflicts with updated websites: When a website is updated, old cached elements can create conflicts and cause errors in loading the page. Clearing the cache ensures that you always see the latest version of the website, which is especially important for websites that are frequently updated with new content.

What are the disadvantages of using cache?

  1. Outdated content: Cache often stores an older version of a website to reduce load time. However, this can mean that you sometimes see outdated content. For example, if a webshop has updated its products or prices, but you are seeing a cached version, it can lead to misunderstandings or errors. This can be problematic, especially when you need the most up-to-date information.
  2. Loading errors: If the cache contains outdated or corrupt data, it can result in errors when you try to load a website. You may experience missing images, incorrect formatting, or the entire website not loading properly. This can be frustrating and may require you to manually clear the cache to resolve the issue.
  3. Space: Although caches are often made up of small data files, over time they can accumulate and take up significant space on your device. This can affect performance, especially if you are using a device with limited storage space, such as a smartphone. A full cache can even result in slower performance as the device struggles to find and use the necessary space efficiently.
  4. Security: Cached data can potentially become a target for malware and hackers. If a hacker gains access to your cache, they can extract information about your browsing habits and even access sensitive data, such as login credentials, if they are stored there. This is one of the reasons why it is recommended to clear the cache regularly, especially on public or shared computers.
  5. Hides changes during development: For developers and designers, caching can be a hindrance as it can hide changes being made to a website. If the cache is not cleared, they may continue to see an older version of the page even after they have implemented new changes. This can make debugging and testing more difficult and time-consuming.
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Frederik Krøl Larsen

CCO & Partner

Frederik er CCO & Partner hos Acend. Hans fornemmeste opgave er, at holde et højt kommunikationsniveau mellem kunder og konsulenter, samt levere solide SEO strategier og holde os opdateret på den altid ændrende Google algoritme.

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