---
title: "JSON Viewer – Chrome extension stats, history and permissions"
description: "30,000 users, rated 4.67 by 51 people. Version 2.2.0, updated 2024-03-26. Requests 1 permission."
url: "https://extensiontracker.com/extension/efknglbfhoddmmfabeihlemgekhhnabb"
---

# JSON Viewer

Live in the Chrome Web Store.

- Users: 30,000
- Rating: 4.67 from 51 ratings
- Last checked: 2026-11-13 05:07 UTC
- Users gained in 7 days: No change
- Users gained in 30 days: No change (+0.0%)
- Rank by users: #3,205 of 292,131 live extensions
- Rank in Developer Tools: #289 of 30,442

## The listing

What the Chrome Web Store shows, as of the last check.

Summary from the listing:

> Port of Firefox's JSON Viewer

- Extension ID: `efknglbfhoddmmfabeihlemgekhhnabb`
- Developer: [Rongjian Zhang](https://extensiontracker.com/developer/u8a213c47ce087d452c6e060e16645816)
- Enhanced Safe Browsing: Trusted ([what this means](https://extensiontracker.com/enhanced-safe-browsing))
- Category: [Productivity › Developer Tools](https://extensiontracker.com/category/productivity/developer)
- First published: 2018-03-04
- Last updated: 2024-03-26
- Version: `2.2.0`
- Size: 140 KiB
- Minimum Chrome: 88
- Languages (1): English
- Support page: `https://github.com/pd4d10/json-viewer`
- Chrome Web Store: <https://chromewebstore.google.com/detail/json-viewer/efknglbfhoddmmfabeihlemgekhhnabb>
- View its code or download CRX: <https://crxpeek.com/extension/efknglbfhoddmmfabeihlemgekhhnabb>
- Search Google for the ID: <https://www.google.com/search?q=%22efknglbfhoddmmfabeihlemgekhhnabb%22&tbs=li:1>

## Users over time

One row per check, newest first, as shown on the Chrome Web Store.

| Checked | Users | Rating | Ratings |
| --- | ---: | ---: | ---: |
| 2026-11-13 | 30,000 | 4.67 | 51 |
| 2026-11-05 | 30,000 | 4.67 | 51 |
| 2026-10-29 | 30,000 | 4.67 | 51 |
| 2026-10-22 | 30,000 | 4.66 | 50 |
| 2026-10-14 | 30,000 | 4.66 | 50 |
| 2026-10-07 | 30,000 | 4.66 | 50 |
| 2026-09-30 | 30,000 | 4.66 | 50 |
| 2026-09-27 | 30,000 | 4.66 | 50 |

## What changed

Every change found on a check, newest first.

No changes found since tracking began on 2026-09-27.

## Developer history

Moves to another publisher account and new contact emails, newest first.

No move to another account and no new contact email since tracking began on 2026-09-27.

We know contact emails only by a keyed hash, so they're never shown. Recent changes: [Account and contact changes](https://extensiontracker.com/owners/).

## What it can access

From the extension's manifest, in plain language.

**Every website:** it can read and change your data on all the sites you visit.

### Sites where it runs scripts

- `<all_urls>`: Every website

### Browser features

- `storage`: Save settings and data in your browser

## More from this developer

Other extensions from the same publisher account.

| Extension | Users | Rating | Ratings | Category |
| --- | ---: | ---: | ---: | --- |
| [System Monitor](https://extensiontracker.com/extension/ecmlflnkenbdjfocclindonmigndecla) | 10,000 | 4.58 | 53 | Developer Tools |
| [Console Importer](https://extensiontracker.com/extension/hgajpakhafplebkdljleajgbpdmplhie) | 10,000 | 4.65 | 20 | Developer Tools |
| [HTTP Indicator](https://extensiontracker.com/extension/hgcomhbcacfkpffiphlmnlhpppcjgmbl) | 10,000 | 4.43 | 7 | Developer Tools |
| [Octohint](https://extensiontracker.com/extension/hbkpjkfdheainjkkebeoofkpgddnnbpk) | 3,000 | 4.60 | 10 | Developer Tools |
| [Memory Monitor](https://extensiontracker.com/extension/abijjlmdgkdoahjkdbicefofaicdendm) | 1,000 | 4.83 | 6 | Developer Tools |
| [QRCode Helper](https://extensiontracker.com/extension/cdahfnnglcbigfkcdobmcijchcckponj) | 22 | – | – | Workflow & Planning |

All 7 extensions by [Rongjian Zhang](https://extensiontracker.com/developer/u8a213c47ce087d452c6e060e16645816).

## About this data

Collected from the extension's public Chrome Web Store listing. It's checked every week, because it has 1,000 or more users, and again whenever a new version appears. Last checked 2026-11-13 05:07 UTC; next check around 2026-11-20.

How the data is collected: <https://extensiontracker.com/methodology>.

## Cite this page

Extension Tracker. “JSON Viewer” (efknglbfhoddmmfabeihlemgekhhnabb). Chrome Web Store data, last checked 2026-11-13. https://extensiontracker.com/extension/efknglbfhoddmmfabeihlemgekhhnabb. Accessed 2026-11-13.

```bibtex
@misc{extensiontracker_efknglbfhoddmmfabeihlemgekhhnabb,
  title   = {JSON Viewer (efknglbfhoddmmfabeihlemgekhhnabb)},
  author  = {{Extension Tracker}},
  year    = {2026},
  note    = {Chrome Web Store data, last checked 2026-11-13},
  url     = {https://extensiontracker.com/extension/efknglbfhoddmmfabeihlemgekhhnabb},
  urldate = {2026-11-13}
}
```

---

From Extension Tracker, a public record of the Chrome Web Store: <https://extensiontracker.com/extension/efknglbfhoddmmfabeihlemgekhhnabb>. It isn't affiliated with Google. The data is free to reuse under CC BY 4.0 (<https://creativecommons.org/licenses/by/4.0/>), crediting Extension Tracker. Every page except search comes as Markdown too: add `format=md` to the address, as in `https://extensiontracker.com/extension/{id}?format=md`.