JSON Formatter Pro - Viewer, Beautifier, Validator, Tree View & Editor
Extension Actions
Auto-format and validate JSON & API responses instantly. Syntax highlighting, tree view, dark mode. Data never leaves your browser.
JSON Formatter Pro automatically detects and formats JSON in your browser. Open any URL that returns JSON or an API response, and it instantly transforms raw JSON into a clean, syntax-highlighted, collapsible tree view — no copy-pasting into web tools needed.
FORMATTING & VALIDATION:
• Auto-Detection — Automatically detects and formats JSON responses and .json files
• JSON Beautifier — Pretty-print minified JSON with proper indentation
• JSON Validator — Catch syntax errors with clear, actionable error messages
• Raw & Parsed Toggle — Switch between raw JSON text and formatted tree view instantly
DEVELOPER TOOLS:
• Syntax Highlighting — Color-coded keys, strings, numbers, booleans, and null values
• Collapsible Tree View — Expand and collapse any node to navigate large JSON documents
• Clickable URLs — Links in JSON values are automatically clickable
• Dark Mode — True dark theme designed for long coding sessions
• Copy to Clipboard — Copy any node or the entire formatted JSON with one click
Runs 100% in your browser. No external servers, no data collection, no tracking, no ads. Fully open-source.
Latest reviews
- Nakshatra Nahar
- Great Extensions The one of the most useful stuff found on internet
- Asifur Rahman
- This JSON formatter is a clean tool that does exactly what you need by running locally so no sensitive tokens or credentials ever leave your computer. The auto paste from clipboard is such a nice touch because your data is already there the moment you open the extension while the tree view makes navigating messy nested responses super helpful. It cleans up messy data fast and makes everything easy to read which is essential when you are working with API responses all day. Anyone who deals with JSON will find this simple and reliable tool very useful for their daily workflow.
- Oyagi Akuma
- This helps me validate, edit, and beautify JSON in one click, the most powerful JSON tool on chrome.JSON fommerter runs 100% localy, as my data never leaves my browser, no server, no tracking, no risk. why i choose this over the others is that I get more than a viewer, as I can format, validate, minify, convert, and diff JSON. It has 100% local processing, as my API keys, tokens, and config data stay safe
- Daniel Traynor
- Finally stopped pasting API responses into random online formatters. The fact that everything runs locally is a huge deal when your working with tokens and credentials all day. Auto-paste from clipboard is such a nice touch, just open it and your JSON is already there. Tree view is super helpful for navigating messy nested responses too. Clean tool, does exactly what you need.
- Sourav Vinodkumar
- This JSON formatter has been very helpful for my work. It cleans up messy data fast and makes everything easy to read. I like that it runs locally, so nothing important leaves my computer. The tool is simple, quick, and reliable, which makes it easy to use every day. Anyone who deals with JSON will find it very useful.
- Deniz
- This extension from Zovo is just as useful as the other ones I have used made by Zovo. it has made my work with json data so much easier than before by formatting raw data into a simple readable version. It's essential for anyone who works with json data frequently in addition to all that it also does everything local so your critical information stays completely safe.
- SkillSet Nest
- Excellent tool to format JSON. It really saves time and it is easy to use.
- عبدالعليم اسماعيل
- Good, excellent, and speeds up the work.
- khang phan
- Really nice extension. Works really well.
- Fargin tech
- I’ve tried several JSON formatting tools, but JSON Formatter Pro stands out as one of the most reliable and efficient extensions I’ve used. It makes working with raw JSON incredibly easy by instantly transforming messy data into a clean, readable format.
- Contextly
- This extension is exactly what I was looking for, and then some! The UI is incredibly smooth, and it offers far more value than I anticipated. It has officially earned a permanent spot in my Chrome browser. Truly impressive work.
- Lazar Antic
- I’ve been using JSON Formatter Pro for handling raw JSON data, and it’s been a great addition to my workflow. It instantly formats messy JSON into a clean, readable structure, which makes debugging much easier. I also like how fast and responsive it is. Simple, reliable, and very helpful for anyone working with APIs or structured data regularly.
- Gimme Video
- Handy JSON tool for developers who work with APIs regularly. The formatting is instant and the syntax highlighting makes it easy to spot structure at a glance. I really like the validation feature that points out exactly where a JSON error is located rather than just saying it is invalid. The compare mode is useful when debugging response differences between environments. Everything runs locally in the browser which is important when working with sensitive data. The side panel integration keeps the formatter accessible without switching tabs. Clean and focused utility that does its job well.
- Степан Медведев
- good extension !
- Siim Liimand
- Now all my JSON files are properly formatted
- Orion Ventures
- Simple and effective. No unnecessary bloat, just the features I needed. Love the clean design.
- Yuval Rokni
- Very useful plugin!, I love it! Very useful, highly recommend trying it.