head to head · open source
uBlock vs markdown-viewer
uBlock has 69,033 GitHub stars, 4,427 forks, 15 open issues and last shipped yesterday. markdown-viewer has 1,723 stars, 234 forks, 99 open issues and last shipped 10 months ago. uBlock leads on adoption by 3,907% (69,033 vs 1,723 stars). uBlock is written in JavaScript under GPL-3.0; markdown-viewer is written in JavaScript under MIT. uBlock has attracted 6% as many forks as stars, markdown-viewer 14%. uBlock was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 3 topic tags (browser-extension, firefox, javascript), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| uBlock | markdown-viewer | |
|---|---|---|
| GitHub stars | ★ 69K | ★ 1.7K |
| License | GPL-3.0 | MIT |
| Written in | JavaScript | JavaScript |
| Last push | 2026-11-02 | 2025-12-29 |
| Forks | ⑂ 4.4K | ⑂ 234 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick uBlock if
- You weight community size — 69K stars and counting
- You want the GPL-3.0 license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick markdown-viewer if
- You want the markdown-viewer feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches JavaScript
- You evaluated both and markdown-viewer fits your workflow better
About uBlock
[![Badge Commits]][Commit Rate] [![Badge Issues]][Issues] [![Badge Localization]][Crowdin] [![Badge License]][License] [![Badge NPM]][NPM] [![Badge Mozilla]][Mozilla] ![Badge Chrome] [![Badge Edge]][Edge] uBlock Origin (uBO) GitHub Releases Stable and development versions on Firefox, Chromium MV2, and Thunderbird. Must be placed manually into web browsers; the Chromium and Thunderbird versions usually won't auto update. Related: uBlock Origin Lite uBlock Origin (uBO) is a CPU and memory efficient [wide spectrum content blocker][Blocking] for Chromium and Firefox. It blocks ads, trackers, coin miners, popups…
read the full uBlock overview →
About markdown-viewer
Markdown Viewer / Browser Extension Install: [Chrome] / [Firefox] / [Edge] / [Opera] / [Brave] / [Chromium] / [Vivaldi] Features Secure by design Render local and remote file URLs Granular access to remote origins Multiple markdown parsers Full control over the compiler options ([markdown it], [marked], [remark]) 30+ Themes ([cleanrmd], [GitHub][github theme]) Custom theme support GitHub Flavored Markdown (GFM) Auto reload on file change Syntax highlighted code blocks ([prism][prism]) Table of Contents (ToC) MathJax formulas ([mathjax]) Mermaid diagrams ([mermaid]) Convert emoji shortnames (icons provided free…
read the full markdown-viewer overview →
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Frequently asked questions
Is uBlock or markdown-viewer more popular?
uBlock has 69,033 GitHub stars and markdown-viewer has 1,723. uBlock has the larger community by that measure.
Are uBlock and markdown-viewer free?
Both are open source. uBlock is licensed under GPL-3.0 and markdown-viewer under MIT. Neither carries a licence fee.
What is the difference between uBlock and markdown-viewer?
uBlock is written in JavaScript and markdown-viewer in JavaScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, uBlock or markdown-viewer?
Choose uBlock if you want the larger community (69,033 stars) or its GPL-3.0 licence terms. Choose markdown-viewer if its feature set, stack or MIT licence fits better. Both are self-hostable.