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HTML Editor Syntax Highlighter

by Peter Mukhortov · Uncategorized

Add syntax highlighting to WordPress code editors using CodeMirror.js

⚠ Stale⚠ Likely abandoned
How scoring works →
54 Health · D
Maintenance 17/100
Rating quality 85/100
Support 70/100

54 health vs 56 average across 16,378 Uncategorized plugins

Removal-risk signals

28/100

Maintenance and integrity signals that tend to precede a WordPress.org removal. Not an official status, a heads-up to act.

  • Not actively maintained. No update in about 2 years.

Directory ranking optimization

How it's scored →

How well this listing is tuned to rank in WordPress.org search, on the factors an owner controls. Not popularity, optimization.

69 / 100

Room to improve

Biggest win: Update recency

Update recency 25/100
WP compatibility 77/100
Rating quality 86/100
Listing tuning 100/100

To rank higher: Last updated 892 days ago — ship an update; wp.org decays a listing's search weight after ~180 days.

Get the full rank-higher report →

Daily downloads

Since 2022-10-05 · 1,421 days · wp.org + Plugin Pulse archive

+44% vs prior 30d
35Downloads · Aug 26

30-day downloads

Rolling 30-day volume · peaks are release surges

1.1K

now · peak 3.2K

1.1K30d downloads · Aug 26

Directory rank vs rivals

wp.org popularity rank over time · higher is better · when a rival's line climbs above yours, they've overtaken you

HTML Editor Syntax H · #696 you Urvanov Syntax Highl · #4088 CodeMirror Blocks · #5309 AH Code Highlighter · #19335

Rating trend

Star average over time · dips mark rough releases

4.4Stars · Aug 26

Update activity

How busy the existing users are, measured as downloads in the last 30 days for every 1,000 active sites. A spike means a new release everyone's pulling; a long, slow decline means an aging user base that updates less.

22per 1k installs · Aug 26

Release cadence

No release in a year
from wp.org release tags

How often this plugin actually ships. A steady rhythm is the maintenance signal a single "last updated" date can't show.

0

releases in the last 12 months

2.4y ago

latest release · v2.4.4

47

tagged releases on record

Recent releases

2.4.4 · 2.4y ago2.4.3 · 5.0y ago2.4.2 · 7.1y ago2.4.1 · 7.5y ago2.4.0 · 7.5y ago2.3.3 · 7.5y ago2.3.4 · 7.5y ago2.3.5 · 7.5y ago2.3.2 · 7.5y ago2.3.1 · 7.6y ago2.3.0 · 7.6y ago2.2.6 · 7.7y ago2.2.5 · 7.9y ago2.2.4 · 8.0y ago

What its installed base runs

via wordpress.org

Share of active installs on each version of this plugin · 97% run the current release. Green is the current release; a big slice on older versions is a user base that has stopped updating.

v2.4 97%
Older / other versions 2.7%

Estimated active installs

The public count shows “50K+”. Our estimate pins where the real number sits.

tracked estimate
50K–60K ≈59K

Refined from the date this plugin crossed into its current band.

Install history · since 2015-03-28 · 1,474 observations

50KInstalls · Aug 26

Estimated value

What this plugin might earn a year, and what it might sell for. Modeled from public signals; we don't see anyone's books.

Est. annual revenue

N/A

Est. acquisition value

N/A

No paid tier is visible, so we don't put a figure on revenue or sale value: that would be guessing. The install base is a real asset to an acquirer, just not one public data lets us price.

Details

Version
2.4.4
Last updated
2.4y ago
Added
2012-04-18 · 14 yrs old
Requires WP
4.0
Tested up to
6.5.0
Requires PHP

Recent reviews

All reviews on wp.org ↗
  1. xiaoxiewl
    2.1y ago

    这个代码高亮插件是我测试过效果最好的一个,但是只能在后台实现,如何在前端文章页面也使用高亮效果呢

    Read on wp.org ↗
  2. Marco Panichi
    2.5y ago

    In the era of Gutenberg and visual builders, as a good old programmer of the past, I need to edit HTML code in the showcase pages of the WordPress sites I create. This plugin is therefore a must-have for me. It works very well, it doesn’t have many options but all those necessary to configure the editing environment comfortable for me.

    Read on wp.org ↗
  3. Alexander Guskov
    4.8y ago

    The fantastical plugin that converts faceless TinyMCE to the powerful tool. The only suggestion is to mark dark/light themes, please

    Read on wp.org ↗
  4. FolioVision
    5.0y ago

    HESH is built on top of Code Mirror which is first class code. The implementation is somewhat eclectic including a settings button in the front end which allows the user to really play with editor settings. Easy access to the settings is convenient at first and then a bit of a distraction. HESH even highlights WordPress shortcodes [shortcode] syntax. What HESH doesn’t have is Markdown syntax highlighting in the posts/pages plain text editor but the WordPress shortcodes and HTML highlighting helps make up for it. What is buggy are the settings on iPhone (iOS 13.5) where the settings buttons more or less don’t work and the settings can’t be closed. If you don’t touch the settings though, HESH provides a better plain text editor than WordPress default (which can be very finicky to accept text entry). It remains easier to edit on iOS with HESH installed than without so no downnmarks here. All in all a great plugin, a bit overwhelmed right now with legacy support for WordPress 4.9 editor, Classic Editor, Code view, plain text editor, Gutenberg and the sixteen different kinds of blocks which might need syntax highlighting. I can’t blame the plugin authors for not being on top of all editors all the time now in the current Gutenberg-induced editor hell. Very, very grateful for their hard work and looking forward to HESH v3. This topic was modified 4 years, 11 months ago by FolioVision.

    Read on wp.org ↗
  5. ximbor
    5.0y ago

    Thank you for taking the time to create such an awesome plugin 🙂 lots of options of colours etc. Very good.

    Read on wp.org ↗
  6. muhiBBi
    5.2y ago

    It’s nice that this plugin is customizable. However, it causes delays while writing in the editor. These pauses are very frustrating.

    Read on wp.org ↗
  7. Tim Reeves
    5.4y ago

    And what’s really neat, is that there is no WP Admin page, all settings are performed while editing. This is a perfect job. I have only used the classic editor (still waiting until Gutenberg is more mature). A previous reviewer wrote that text added in the Text tab is lost when switching to Visual – I have not seen this happen. I’m very happy 🙂

    Read on wp.org ↗
  8. liaris
    6.0y ago

    Amazing!

    Read on wp.org ↗

Latest updates

via wp.org changelog

Recent releases and news for this plugin

  1. Version 2.4.4 Added about 15 new themes 2.4.4
  2. Version 2.4.3 Updated css for wordpress v5.8 2.4.3
  3. Version 2.4.2 removing survey notice 2.4.2
  4. Version 2.4.1 fixed bug: notification would not dismiss if the visual editor was open fix bug: Setting Form can now submit from memory, not just when the dom is in the page. 2.4.1
  5. Version 2.4.0 updating a major number so I can review downloads more accurately. reorganized the codebase Reverting the name-change of hesh.php This name-change of html-editor-syntax-highlighter.php to hesh.php caused the plugin to de 2.4.0
  6. Version 2.3.5 remove Github Updater headers testing WP update Process 2.3.5

Behavioral tests

via WP Hive

Automated install-time checks, tested on PHP 7.4.8 · WP 5.8.1

Low memory footprint
Low page-speed impact
Runs on latest PHP + WP
No PHP errors
No JS errors
Activates cleanly
No resource errors
No external HTTP errors
Optimized database use
Frequently updated

Languages

via translate.wordpress.org

Translated into 7 languages, 7 at 90% or more

Danish 100%
French (France) 100%
German 100%
German (Formal) 100%
Russian 100%
Swedish 100%
Ukrainian 100%

Growth timeline

Install-tier crossings we have observed, and how long each tier took to outgrow

  1. 2025-01-25 60K+ → 50K+ down after 265 days in tier
  2. 2024-05-05 50K+ → 60K+ up after 145 days in tier
  3. 2023-12-12 60K+ → 50K+ down after 263 days in tier
  4. 2023-03-24 50K+ → 60K+ up after 19 days in tier
  5. 2023-03-05 60K+ → 50K+ down after 10 days in tier
  6. 2023-02-23 50K+ → 60K+ up after 90 days in tier
  7. 2022-11-25 60K+ → 50K+ down after 10 days in tier
  8. 2022-11-15 50K+ → 60K+ up after 1 days in tier

Competes with

The plugins that solve the same job, ranked by shared tags then reach, closest match first. The letter on the right is each plugin's health grade (A best, F worst).

Compare head to head →

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Preview card ↗

HTML Editor Syntax Highlighter: 50K+ active installs, 4.4★ (110 reviews). Plugin Pulse (WP Mayor), as of 2026-08-25. https://plugins.wpmayor.com/plugin/html-editor-syntax-highlighter