Best JSON viewer Chrome extensions (2026)

The 20 most-used JSON viewers on the Chrome Web Store, ranked by real store users. Listings rated under 3 stars on 20+ ratings are left out.

Top 20 JSON viewers, ranked

1
JSON Formatter
Makes JSON easy to read
≈2M users4.3★ from 2.1K ratingsUpdated 5 months ago3 permissions
JSON Formatter alternatives
2
JSON Viewer Pro
A powerful JSON viewer and formatter that offers advanced features for developers and data analysts to visualise and analyse JSON
≈300K users4.6★ from 219 ratingsUpdated 7 weeks ago3 permissions
JSON Viewer Pro alternatives
3
JSON Viewer
Validates and makes JSON documents easy to read. Open source.
≈100K users4.2★ from 157 ratingsNot updated for 2+ years7 permissions
JSON Viewer alternatives
4
JSON Formatter
Formats JSON automatically! Open Source, Available with 60+ Themes, Syntax Highlighting, automatically linkifies links and more.
≈40K users4.4★ from 44 ratingsUpdated 4 months ago4 permissions
JSON Formatter alternatives
5
JSON Viewer
Port of Firefox's JSON Viewer
≈30K users4.7★ from 50 ratingsNot updated for 2+ years1 permissions
JSON Viewer alternatives
6
Testing Toolkit: 15+ Essential Manual Testing Tools
Redefine manual testing with best-in-class tools, supercharged with AI. JSON Formatter, Cache Manager, Responsive testing & more
≈30K users4.6★ from 27 ratingsUpdated in the last day18 permissions
7
CodeBeautify
All Developer Friendly tools at your finger tips such as JSON Formatter, XML Viewer, SQL Formatter, Numbers to Words converters
≈10K users5.0★ from 16 ratingsNot updated for 3+ yearsNo special permissions
8
JSON Lite
Fast JSON viewer - highlights, shows items count/size, handles large files
≈10K users4.8★ from 61 ratingsNot updated for 2+ years6 permissions
9
JSON Formatter Pro
Beautiful JSON viewer with sidebar — search, copy paths, export, pin nodes, and history.
≈10K users4.0★ from 15 ratingsUpdated 7 months ago1 permissions
10
JSON Formatter
Instantly transform raw JSON into a beautifully structured and color-coded format.
≈10K users4.4★ from 7 ratingsUpdated 9 months ago1 permissions
11
JSON Viewer
Most aesthetic & customizable JSON/JSONP viewer with themes, custom search, syntax highlighting/checking & copy features.
≈10K users4.9★ from 31 ratingsUpdated 2 months ago3 permissions
12
JSON Pretty
Use JSON Pretty to parse, format, and pretty print json data. A powerful json formatter and beautify tool for easy data readability.
≈10K users4.6★ from 48 ratingsUpdated 12 months ago4 permissions
13
JSON Formatter
Makes JSON easy to read. Open source.
≈9K users4.5★ from 23 ratingsUpdated 19 months ago3 permissions
14
Seven JSON Viewer
Minimal JSON Viewer with JSON Path
≈7K users4.3★ from 13 ratingsNot updated for 4+ years1 permissions
15
JSON Viewer
Makes JSON response easy to read.
≈5K users5.0★ from 2 ratingsUpdated 6 months agoNo special permissions
16
Virtual Json Viewer
JSON browser extension with virtual DOM, search and JQ filtering
≈3K users4.7★ from 11 ratingsUpdated 6 days ago2 permissions
Virtual Json Viewer alternatives
17
JSON Viewer
Pretty JSON Viewer – an online json formatter, validator, and viewer for easy formatting and validation of json files.
≈1K users5.0★ from 5 ratingsUpdated 5 months ago1 permissions
18
JSON Formatter 格式化
JSON格式化，可以多窗口多开，方便对比JSON入参和数据出参，现已支持粘贴图片到工作区。Makes JSON easy to read and compare, Image contrast is now supported.
≈1K users4.9★ from 9 ratingsUpdated 21 months ago1 permissions
19
API Testing PRO by Zovo - REST and HTTP Client
REST API client and HTTP tester. Send GET, POST, PUT, DELETE. JSON viewer, auth, headers. Postman alternative.
≈1K users5.0★ from 25 ratingsUpdated 13 days ago5 permissions
20
CleanJSON — Offline JSON Viewer & Formatter
100% local JSON viewer. Formats, collapses, validates. Nothing leaves your browser.
≈1K users5.0★ from 4 ratingsUpdated 2 weeks ago4 permissions