Stable signalUnknownMedium-risk permissions
JSON Viewer icon

JSON Viewer

Port of Firefox's JSON Viewer

Users30KCurrent public install base
Rating4.7Store average score
Reviews49Public review volume
Manifest versionV3Extension platform version
7-day growth0Net users gained this week
7-day growth rate0%Relative weekly velocity
Preview

JSON Viewer Media preview

1 assets
Trend

User growth trend

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User Growth Over Time

30K30K30K30K30K2026年7月14日2026年7月17日2026年7月20日Latest: 30K
Rating trend

7-day rating trend

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7-day rating change

Start
4.65
Latest
4.65
7-day rating change
0.00
4.554.604.654.704.752026年7月14日2026年7月17日2026年7月20日Latest: 4.65
2026年7月14日2026年7月20日
Growth overview

Daily, weekly, and monthly growth

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1-day growthFlat
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7-day growthFlat
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30-day growthFlat
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Technical snapshot

Version, languages, and crawl freshness

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Version2.2.0
ManifestV3
Size140KiB
Languages1English
Published
Store updated
Last crawled
English
Overview

Product summary

Review the store description, core capabilities, and common use cases.

This is a port of Firefox's JSON Viewer

If you open a JSON file in the browser, it is parsed and given syntax highlighting. Arrays and objects are shown collapsed, and you can expand them using the "+" icons.

Source code:

https://github.com/pd4d10/json-viewer

Reviews

Recent review snapshot

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Store average score4.7Chrome Web Store aggregate rating, including ratings without synced review text
Synced text average4.4Average computed only from synced review bodies below
Reviews with text28Synced review bodies
Total ratings / reviews49Chrome Web Store public rating/review count

Store average score: 4.7. The bars below are calculated from synced review text only, so they may be empty for extensions that have public ratings but no synced comments yet.

5
23
4
0
3
0
2
3
1
2
Iman Sh2026年1月6日
5

Perfect!

Version 2.2.0Language en
1 helpful · 0 not helpful
Tom Kisha2025年12月5日
2

Seems to work, even when you don't want it to. For example, visiting namecheap.com. It replaces the entire webpage with JSON Viewer because it found some hidden JSON somewhere on the page. Maybe check the response MIME type first?Developer doesn't seem interested in fixing it.

Version 2.2.0Language en
0 helpful · 1 not helpful
Marko M2025年7月5日
5

The single best json viewer extension. Works on huge payloads and on streamed responses.

Version 2.2.0Language en
Peter Mckenna2025年5月21日
1

When it works it is very nice. However it doesn't always work reliably. I've just opened a clearly JSON formatted file ending with .json in the browser's regular window and it has not been picked up by this extension. It's happened a few times recently.

Version 2.2.0Language en
Prab Singh2025年3月4日
5

Works beautifully

Version 2.2.0Language en
Kenta Takahashi2024年3月21日
1

Suddenly degraded. Only "pretty print" function is shown in UI, but others are not.

Version 2.1.0Language en
2 helpful · 0 not helpful
Stelios Giannatos2024年1月23日
5

Just what we needed!!!

Version 2.1.0Language en
Xuehui Zhu2023年12月26日
2

好慢

Version 2.1.0Language zh
Robert Mylne2023年9月14日
5

Works now in Chrome 117, updating review to 5 stars!

Language en
1 helpful · 0 not helpful
Ollie Taylor2023年9月8日
5

Does what it says on the tin - when you visit a file, or JSON response it displays a useful JSON debugging UI that's easy to work with.

Language en