Firefox

Basic JSON Formatter

by Dr. McKay · more by this developer →
Topics Developer tools
Also on Chrome · 483 users

Basic JSON Formatter has 2,080 daily users (-1.1% this week), rated 4.6 from 14 ratings, #233 of 14,759 in Web Development.

View in the Firefox store ↗
Daily users
2,080
-24 (-1.1%) a week, measured over 13 days
Rating
4.6
14 ratings
+0 ratings a week, measured over 13 days
Rank on Firefox
#2,210
of 628,619
Version
1.1.0
Last updated 2019-05-14
Weekly downloads
2

Description

Adds a page action to pretty-print JSON. Unlike similar extensions, this simply pretty-prints it. It doesn't add any kind of viewer, colors, or collapsing.

If you want this to work as expected, disable devtools.jsonview.enabled in about:config.

Reviews In every language.

From 14 ratings.

  1. ★★★★★ Wildlife3572 · 22 Oct 2025 · v1.1.0
    Simple and effective
  2. ★★★★★ Tor · 12 Apr 2023 · v1.1.0
    it's great
  3. ★★★★☆ Fabio Caccamo · 11 Jun 2021 · v1.1.0
    Very nice extension, it does exactly what I was looking for, the only problem is that the icon in the url bar doesn't honor the dark theme, so using the dark theme the icon is not visible. Once fixed this issue it will be 5 stars for me.
  4. ★☆☆☆☆ Mr.Robot · 6 Nov 2020 · v1.1.0
    也许是我没有找到使用方法，无法使用。
  5. ★★★★★ Firefox user 14209058 · 5 Sep 2018 · v1.0.6
    Nice colors and works out of the box without extra configuration steps
  6. ★★★★★ Firefox user 10207243 · 23 Nov 2017 · v1.0.6
    firefox 57 can't run
  7. ★★★★★ Firefox user 13448209 · 15 Nov 2017 · v1.0.6
    Simple, user-friendly and fast; recommends a thousand times!
  8. ★★★★★ Emil Vikström · 2 Oct 2017 · v1.0.6
    I regularly need to work with large files. This addon have no trouble formatting 1 MB files instantly. You can also select and copy text from the formatted JSON wihtout getting any garbage characters. Does exactly what it says, thanks for a great plugin!

Search Firefox reviews - every stored review from the store, not only this listing's.

Growth change in installs

Per Growth Growth % Actual change Measured over
day +35 +1.7% +37 1.1 days
week -24 -1.1% -45 13 days
month Not enough history yet
year Not enough history yet
How these figures are measured

Change in installs, scaled to each window from the real gap between crawls. A window needs a full period of history before it reports anything.

Rank among tracked Firefox listings#286
2026-09-27 · #248 2026-09-28
Daily users2,080
2026-09-26 · 2,065 2026-10-23
Ratings14
2026-09-26 · 14 2026-10-23
Average rating4.6
2026-09-26 · 4.6 2026-10-23
Weekly downloads2
2026-09-26 · 5 2026-10-23

Alternatives to Basic JSON Formatter

Name Daily users Rating
JSON Formatter by Arnav Kumar 3,588 5.0
JSON-formatter by Alexei Moroz 1,587 3.9

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