# JSON - Online linter > Find a quick and easy online JSON linter tool. Paste your JSON string to display it as a clear, readable tree-view with code folding features. ---  **TL;DR** This article introduces the author's free JSON Linter tool (source on GitHub, hosted at jsonlint.avonture.be) for pasting a JSON string and viewing it as a foldable, readable tree — useful for both syntax-checking JSON you're writing and inspecting API responses. It also mentions the Chrome "JSON Formatter" extension for auto-formatting JSON pages in the browser. Exactly like my [SQL - Formatting tool](/blog/sql-formatter), it's always useful to have a tool in your favorites that lets you copy/paste a JSON character string and display it as a tree-view with or without a code folding feature. I use it quite regularly when I'm writing a JSON string and I want to check that there are no syntax errors (lint) or, on the other hand, and for example, when I call an API that returns JSON and I want to analyze the code received. In these cases, the collapse functionality comes in very handy. *Two alternatives depending on the context: [`jq`](/blog/linux-jq) when you're already in a console, and [Rendering a JSON file as a mind map](/blog/json-crack) when the structure matters more than the values. To produce test JSON rather than read it, see [JSON - Faker & Mockup](/blog/json-faker).* Retrieve my **JSON Linter** tool and sources on . The tool is accessible online:  ## Chrome Addon If you're using Chrome and if the web page output is a JSON string, the [JSON Formatter](https://chromewebstore.google.com/detail/json-formatter/bcjindcccaagfpapjjmafapmmgkkhgoa) addon will immediately display it in a readable form. For instance, instead of getting this page:  Chrome will show this:  Other JSON tools worth knowing about: [rendering a JSON file as a mind map](/blog/json-crack) and [generating fake JSON data](/blog/json-faker).