JSON files open in any text editor, and most computers have one built in

A JSON file is plain text — it just stores data in a specific format that programs can read. You do not need special software. On Windows, you can right-click the file, choose "Open with," and pick Notepad. On Mac, double-click the file and it will open in TextEdit. On Linux, any text editor works: gedit, nano, or vim from the command line.

The file will look like a list of words, numbers, and symbols arranged in a particular pattern. That pattern is what makes it JSON instead of a random text file. You can read it, copy parts of it, or search through it using the Find function (Ctrl+F on Windows, Cmd+F on Mac).

Key Takeaways

  • Windows Notepad, Mac TextEdit, and Linux text editors all open JSON files without installing anything new.
  • Right-click the file on Windows and choose "Open with" to pick your text editor; on Mac, double-click and select an editor from the menu that appears.
  • If the text looks jumbled or unreadable, the file may be corrupted or not actually a JSON file despite its name.
  • For large JSON files or ones you need to edit, a code editor like Visual Studio Code makes the text easier to read and search.

Opening JSON files on Windows

Right-click the JSON file and select "Open with." A menu will appear showing programs on your computer. Click "Notepad" if you see it. If Notepad is not listed, click "Choose another app" or "More apps," scroll down, and select Notepad from the full list.

The file will open in a new window. The text inside may look crowded together on one line, or it may be spread across many lines — either way is normal. If you want to make it easier to read, you can use a code editor instead, which automatically formats JSON to show the structure more clearly.

Opening JSON files on Mac

Double-click the JSON file. A dialog box will appear asking which program to use. Select "TextEdit" from the list. If TextEdit does not appear, click "Other," navigate to Applications > Utilities, and select TextEdit.

TextEdit will open the file. Before you make any changes, go to Format menu and select "Make Plain Text" — this ensures the file stays in the right format if you save it. If the text is hard to read because it is all on one line, you can use a different editor like Visual Studio Code, which is free and formats JSON automatically.

Opening JSON files on Linux

From the file manager, right-click the JSON file and select "Open With." Choose a text editor from the menu — gedit is common on Ubuntu and other desktop Linux systems. If you prefer the command line, open a terminal, navigate to the folder containing the file, and type cat filename.json to view the contents, or nano filename.json to open it in an editor.

The file will display in your chosen editor. If it is difficult to read because the formatting is compressed, you can pipe it through a JSON formatter using the command line: cat filename.json | python3 -m json.tool (if Python 3 is installed). This will print a nicely formatted version to your screen.

Using a code editor for easier reading

If the JSON file is large or the text is hard to follow, download Visual Studio Code (free, available for Windows, Mac, and Linux). Open the program, go to File > Open File, and select your JSON file. The editor will automatically color-code the text and indent it so you can see the structure clearly.

Visual Studio Code also has a built-in search function (Ctrl+F or Cmd+F) that makes it easy to find specific words or values in the file. If the file contains an error in its format, the editor will highlight the problem area, which helps you understand what went wrong.

What to do if the file will not open or looks wrong

If you double-click the file and nothing happens, the file extension may be hidden or incorrect. Right-click the file, select Properties (Windows) or Get Info (Mac), and check the full filename. It should end in .json. If it ends in something else, the file may have been saved with the wrong extension.

If the file opens but shows only symbols, random characters, or unreadable text, the file may be corrupted or encoded in a format your text editor cannot display. Try opening it with a different editor. If it still looks wrong, the file itself may have been damaged during download or transfer, and you may need to get a fresh copy from wherever you downloaded it.

When you need to edit a JSON file

You can edit a JSON file in any text editor, but you must be careful about the format. JSON has strict rules: values must be in quotes, lists must use square brackets, and objects must use curly braces. If you change the format by accident, the file will no longer work for its intended purpose.

If you are not sure whether your changes are correct, use Visual Studio Code or an online JSON validator (search "JSON validator" in your browser). Paste your edited file into the validator, and it will tell you if the format is still correct. Save your changes only after the validator confirms there are no errors.

Frequently Asked Questions

Can I open a JSON file on my phone?

Yes, but it depends on your phone. On Android, use a text editor app like QuickEdit or Jota+. On iPhone, use an app like TextEdit or Koduo. Search your phone's app store for "text editor" or "JSON viewer." Many of these apps are free and will display the file in a readable format.

What if the JSON file is too large to open?

Very large JSON files can slow down or freeze a regular text editor. Use Visual Studio Code, which handles large files better, or use the command line to view just part of the file. On Windows, type type filename.json | more to see it one screen at a time. On Mac or Linux, use less filename.json.

Is it safe to open a JSON file I downloaded from the internet?

Opening a JSON file in a text editor is safe — you are just reading text. However, do not run or execute a JSON file, and do not open it in a program you do not recognize. If you downloaded it from an untrusted source, scan it with your antivirus software first, or open it in a text editor to see what it contains before using it.

Why does my JSON file have a different file extension?

Some programs save JSON data with a different extension like .geojson (geographic data), .jsonl (JSON lines), or .ndjson (newline-delimited JSON). These are still plain text and open the same way as a regular JSON file. The different extension just tells you the data is formatted for a specific purpose.