---
title: "SpacingJS – Chrome extension stats, history and permissions"
description: "2,000 users, rated 4.27 by 11 people. Version 1.1.0, updated 2025-06-18. Requests 2 permissions."
url: "https://extensiontracker.com/extension/fhjegjndanjcamfldhenjnhnjheecgcc"
---

# SpacingJS

Live in the Chrome Web Store.

- Users: 2,000
- Rating: 4.27 from 11 ratings
- Last checked: 2026-09-27 01:07 UTC
- Users gained in 7 days: – (needs a week of history)
- Users gained in 30 days: – (needs a month of history)
- Rank by users: #14,553 of 264,703 live extensions
- Rank in Developer Tools: #1,275 of 27,615

## The listing

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

Summary from the listing:

> Precision spacing measurement tool for web developers and designers. Hold Alt/Option key and hover over elements to measure.

- Extension ID: `fhjegjndanjcamfldhenjnhnjheecgcc`
- Developer: [Steven Lei](https://extensiontracker.com/developer/ua7b1756dcee00f6e3bdbe0f4b310ab08)
- Category: [Productivity › Developer Tools](https://extensiontracker.com/category/productivity/developer)
- First published: 2021-11-12
- Last updated: 2025-06-18
- Version: `1.1.0`
- Size: 14.8 KiB
- Minimum Chrome: 88
- Languages (1): English
- Website: `spacingjs.com`
- Support page: `https://spacingjs.com`
- Chrome Web Store: <https://chromewebstore.google.com/detail/spacingjs/fhjegjndanjcamfldhenjnhnjheecgcc>
- View the code or download the CRX, in CRX Viewer: <https://robwu.nl/crxviewer/?crx=https%3A%2F%2Fchromewebstore.google.com%2Fdetail%2Ffhjegjndanjcamfldhenjnhnjheecgcc>

## Users over time

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

| Checked | Users | Rating | Ratings |
| --- | ---: | ---: | ---: |
| 2026-09-27 | 2,000 | 4.27 | 11 |

## What changed

Every change found on a check, newest first.

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

## What it can access

From the extension's manifest, in plain language.

### Browser features

- `activeTab`: The tab you're on, only after you click the extension
- `scripting`: Run scripts on sites it can reach

## More from this developer

Other extensions from the same publisher account.

| Extension | Users | Rating | Ratings | Category |
| --- | ---: | ---: | ---: | --- |
| [FontUsed - Font Audit Tool](https://extensiontracker.com/extension/anlpekbhbhpnbaeheafmenehmnmahjdg) | 115 | 5.00 | 4 | Developer Tools |

All 2 extensions by [Steven Lei](https://extensiontracker.com/developer/ua7b1756dcee00f6e3bdbe0f4b310ab08).

## 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 2026-09-27 01:07 UTC; next check around 2026-09-30.

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

## Cite this page

Extension Tracker. “SpacingJS” (fhjegjndanjcamfldhenjnhnjheecgcc). Chrome Web Store data, last checked 2026-09-27. https://extensiontracker.com/extension/fhjegjndanjcamfldhenjnhnjheecgcc. Accessed 2026-09-28.

```bibtex
@misc{extensiontracker_fhjegjndanjcamfldhenjnhnjheecgcc,
  title   = {SpacingJS (fhjegjndanjcamfldhenjnhnjheecgcc)},
  author  = {{Extension Tracker}},
  year    = {2026},
  note    = {Chrome Web Store data, last checked 2026-09-27},
  url     = {https://extensiontracker.com/extension/fhjegjndanjcamfldhenjnhnjheecgcc},
  urldate = {2026-09-28}
}
```

---

From Extension Tracker, a public record of the Chrome Web Store: <https://extensiontracker.com/extension/fhjegjndanjcamfldhenjnhnjheecgcc>. 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. Extension, developer and list pages come as Markdown too: add `format=md` to the address, as in `https://extensiontracker.com/extension/{id}?format=md`.