What a JSON file is and why you might have one
A JSON file is a text file that stores data in a format computers can read easily. JSON stands for JavaScript Object Notation. You might have one because you downloaded settings from a website, exported data from an app, or received a file from someone else. The file will have a name ending in .json — for example, settings.json or data.json.
JSON files are plain text inside, which means you can open them in any text editor. They are not like Word documents or PDFs — they do not have special formatting or images. What you see is the raw data, usually arranged in a way that looks organized but might seem confusing if you are not used to it.
The reason JSON files exist is that they are a standard way for programs to share information with each other. When you open one, you are usually either checking what data is inside, moving that data somewhere else, or editing it to change a setting.
Key Takeaways
- JSON files are text files you can open with any text editor — Notepad on Windows, TextEdit on Mac, or gedit on Linux all work.
- Right-click the JSON file, choose "Open with", and pick a text editor from the list to open it.
- If no text editor appears in the "Open with" menu, you can download one for free, or use your web browser to view the file.
- Do not open a JSON file with Microsoft Word or other word processors, because they add formatting that breaks the file.
- If you want to edit a JSON file and save it, make sure your text editor is set to save as plain text, not as a formatted document.
Opening a JSON file on Windows
The simplest way on Windows is to use Notepad, which comes built in. Right-click the JSON file, hover over Open with, and click Notepad. The file will open in a new window showing the text inside.
If Notepad does not appear in the "Open with" menu, click Choose another app at the bottom. Scroll down and look for Notepad in the list. If you still do not see it, click More apps to expand the full list. Once you find Notepad, click it and then click Open.
If you want a text editor with more features — like line numbers or color-coding that makes the data easier to read — you can download one for free. Visual Studio Code and Notepad++ are both popular choices. Download the installer from their websites, run it, and follow the setup steps. After installation, right-click the JSON file, choose Open with, and select the new editor from the list.
Opening a JSON file on Mac
On Mac, the built-in text editor is called TextEdit. Right-click the JSON file and select Open With, then click TextEdit. The file will open in a new window.
TextEdit on Mac has one important quirk: it defaults to a formatted mode that will break your JSON file if you edit and save it. When the file opens, go to the Format menu at the top and click Make Plain Text. This switches it to plain text mode. Now you can read the file safely, and if you make changes, they will save correctly.
If you prefer a text editor with more features, download Visual Studio Code or Sublime Text from their websites. Both are free to use (Sublime Text shows a reminder to purchase, but you can ignore it). After installation, right-click the JSON file, choose Open With, and select your new editor.
Opening a JSON file on Linux
On Linux, the default text editor varies by system. Right-click the JSON file and look for Open With or Open. Common built-in editors include gedit, nano, or vi. Click whichever one appears, and the file will open.
If you are using the terminal, you can also type cat filename.json (replacing filename with your actual file name) to view the contents in the terminal window itself. This does not open a separate editor — it just displays the data.
For a more user-friendly editor with features like syntax highlighting, download Visual Studio Code or gedit if it is not already installed. Most Linux distributions have a package manager (like apt or yum) where you can search for and install these tools.
Using your web browser to view a JSON file
If you do not want to install a text editor, you can open a JSON file in your web browser. Drag the JSON file into an open browser window, or use the browser's File menu and select Open File. The browser will display the contents as text.
Some browsers, like Chrome and Firefox, will even format the data with indentation and collapsible sections, making it easier to read. This is useful if you just want to look at the data without editing it. If you need to make changes, you will still need a text editor.
One limitation: if the JSON file is very large (more than a few megabytes), your browser might slow down or freeze. For large files, a dedicated text editor is a better choice.
What to do if the file will not open
If you double-click a JSON file and nothing happens, or it opens in the wrong program, the file type may not be associated with a text editor. Right-click the file and choose Open with. If you see only programs like Word or Excel, do not use them — they will corrupt the file. Instead, look for a text editor in the list, or click Browse to find one manually.
If a text editor still does not appear, download one. Visual Studio Code works on Windows, Mac, and Linux and is free. After you install it, right-click the JSON file again, choose Open with, and you should now see the new editor in the list.
Another option: if the JSON file came from the internet and your browser downloaded it, check your Downloads folder. Sometimes files land there instead of where you expected. Once you find it, use the steps above to open it with a text editor.
Editing and saving a JSON file safely
If you need to change something in a JSON file, open it with a text editor as described above. Make your changes directly in the text. JSON files have a specific structure — data is organized with curly braces {} and square brackets [] — so be careful not to delete or move these by accident, or the file may stop working.
When you are done editing, save the file. Use Ctrl+S on Windows or Linux, or Command+S on Mac. Make sure your text editor is set to save as plain text, not as a formatted document. Most text editors do this by default, but if you are using TextEdit on Mac, you already switched to plain text mode earlier, so you are safe.
If you are not sure whether your changes are correct, keep a backup of the original file before you edit. Right-click the JSON file, choose Copy, then Paste in the same folder. You now have two copies — edit one and keep the other as a reference.
Frequently Asked Questions
Can I open a JSON file with Microsoft Word or Google Docs?
You can, but you should not. Word and Google Docs add formatting that breaks JSON files. If you open a JSON file in Word and save it, the file will no longer work in the program that needs it. Always use a plain text editor instead.
What if I see strange characters or symbols when I open the JSON file?
This usually means the file is using a different character encoding than your text editor expects. Try opening it with a different editor — Visual Studio Code handles most encodings automatically. If the problem persists, the file may be corrupted, and you should ask the person or program that created it for a fresh copy.
Do I need to change the file name or extension to open it?
No. The .json extension tells your computer what type of file it is, but you do not need to rename it. Just right-click it and open it with a text editor as described above.
Is it safe to open a JSON file I received from someone?
JSON files are text only, so they cannot contain viruses or malware. However, if you open it and edit it, make sure you understand what you are changing. If someone sent you a JSON file and asked you to edit it without explaining what it does, ask them to explain first.
Can I convert a JSON file to another format like Excel or CSV?
Some online tools and programs can convert JSON to CSV or Excel, but the conversion depends on how the data is structured inside the JSON file. If you need this done, search for "JSON to CSV converter" and try one of the online tools. Keep in mind that not all JSON data converts cleanly, so check the result carefully.