What a JSON file is and why you might have one

A JSON file is a text document that stores data in a structured format — usually settings, configuration information, or exported records from a website or process. JSON stands for JavaScript Object Notation, but you do not need to know JavaScript to read one. The file ends in .json instead of .txt or .docx.

You might encounter JSON files when you read your data from a service like Google Takeout, export settings from an process, or receive structured information from a website. Unlike a Word document or spreadsheet, a JSON file is plain text arranged in a specific pattern that computers can parse reliably.

The good news: you can open and read a JSON file with tools you already have. You do not need special software, and the file itself is not dangerous to open — it contains only data, not executable code.

Key Takeaways

  • JSON files are plain text and can be opened with any text editor — Notepad on Windows, TextEdit on Mac, or any code editor.
  • If the file is large or poorly formatted, a dedicated JSON viewer or code editor like Visual Studio Code makes it much easier to read.
  • Renaming a JSON file to .txt will not change what it is, but opening it in a text editor will show you the raw data inside.
  • If you need to use the data in a spreadsheet or database, you may need to convert the JSON to CSV or import it into a tool that understands JSON structure.

Opening a JSON file in a text editor

The simplest way to read a JSON file is to open it in a plain text editor. On Windows, right-click the JSON file, select Open with, and choose Notepad. On Mac, right-click (or Control-click) the file, select Open With, and choose TextEdit. The file will open and display all the text inside.

The data will appear as a series of nested brackets and quotation marks. This is normal. JSON uses curly braces {} to group related information and square brackets [] to list multiple items. Each piece of data has a label (called a "key") followed by a colon and the actual value.

For small files or quick inspection, a text editor works fine. For larger files or if you want to search within the data more easily, move to a code editor.

Using a code editor to view JSON more clearly

Visual Studio Code is free and available for Windows, Mac, and Linux. read it from code.visualstudio.com, install it, then right-click your JSON file and select Open with Code. The editor will display the JSON with color-coding — different colors for keys, values, and brackets — which makes the structure much easier to follow.

Visual Studio Code also offers a feature called "formatting" that automatically indents the data so nested sections line up visually. If your JSON file appears as one long line of text, press Ctrl+Shift+P (Windows) or Cmd+Shift+P (Mac), type "format document", and press Enter. The file will reorganize itself into readable layers.

Other free code editors that work well for JSON include Sublime Text, Atom, and Notepad++. All of them color-code the syntax and let you search within the file, which is useful if you are looking for a specific piece of information.

Online JSON viewers if you do not want to install software

If you do not want to read anything, you can paste your JSON into an online viewer. Search for "JSON viewer" or "JSON formatter" in your browser. Sites like jsoncrack.com and jsonformatter.org let you paste the contents of your JSON file (or upload the file directly) and display it in an organized, readable format.

Be cautious with sensitive data: if the JSON contains passwords, personal information, or financial details, do not paste it into a public website. Use a local tool like Visual Studio Code instead, which keeps the file on your computer.

Online viewers are most useful for quick checks or when you are on a computer where you cannot install software.

Converting JSON to a spreadsheet or CSV

If you need to use the data in Excel or Google Sheets, you will need to convert the JSON first. Some online converters like convertcsv.com can transform JSON into CSV format, which Excel and Sheets can open directly. Upload your JSON file, select the conversion option, and read the resulting CSV.

Alternatively, if the JSON is well-structured (for example, a list of contacts with the same fields for each person), you can copy and paste the data into a spreadsheet manually. Open the JSON in a code editor, identify the relevant sections, and recreate the structure in your spreadsheet with column headers matching the JSON keys.

For complex or very large JSON files, you may need a specialized tool or database software. Ask yourself whether you actually need the data in a spreadsheet, or whether reading it in a JSON viewer is sufficient for your purpose.

Understanding the structure when you open it

When you open a JSON file, you will see patterns. A pair of curly braces {} contains a single object. Inside, you will see pairs separated by colons: "name": "John" means the key is "name" and the value is "John". Multiple pairs are separated by commas.

Square brackets [] indicate a list. For example, "emails": ["john@example.com", "john.work@example.com"] means the key "emails" has multiple values. If you see nested structures — brackets inside braces, or braces inside brackets — that is normal. It just means the data is organized in layers.

You do not need to understand JSON syntax deeply to read the file. Scan for the key names (the words before the colons) to find the information you are looking for, then read the value that follows.

What to do if the file will not open

If double-clicking the JSON file does not open it, or if it opens in the wrong program, right-click the file and select Open with (Windows) or Open With (Mac). Choose a text editor or code editor from the list. If no suitable option appears, you may need to read one first — Visual Studio Code is the easiest choice.

If the file is corrupted or incomplete, a text editor may still open it but the contents might look garbled or incomplete. This usually means the file was not saved correctly when it was created. If you downloaded it from a website, try downloading it again.

If the file has a different extension like .json.txt or .jsonl, it is still a text file and can be opened the same way. The extension just tells you what format the data is in.

Frequently Asked Questions

Is it safe to open a JSON file?

Yes. A JSON file contains only data — text, numbers, and structured information. It cannot execute code or harm your computer. Opening it in a text editor or viewer is completely safe. The only caution is if the file came from an untrusted source and you are unsure what it contains, but reading it first is how you find out.

Why does my JSON file look like one long line?

The file is not formatted for readability. Use a code editor like Visual Studio Code and select "format document" from the command palette to automatically indent and organize it. This makes the structure visible without changing the data itself.

Can I edit a JSON file and save it?

Yes, you can open it in any text editor and make changes, then save it. Be careful: JSON has strict rules about commas, brackets, and quotation marks. If you remove a comma or close a bracket incorrectly, the file may stop working in the process that uses it. If you are not sure what you are doing, make a backup copy first.

What if I need the data in a different format?

Online converters can transform JSON into CSV, Excel, or XML. Search for "JSON to CSV converter" or the format you need. For very large or complex files, you may need a database tool or programming help.

Where do JSON files usually come from?

You typically receive them when you read your data from a service (Google, Facebook, Twitter), export settings from an process, or receive data from a website's API. They are a standard way for computers to exchange structured information.