head to head · open source
uBlock vs markdown-viewer
uBlock has 67,937 GitHub stars, 4,354 forks, 15 open issues and last shipped yesterday. markdown-viewer has 1,684 stars, 227 forks, 99 open issues and last shipped 9 months ago. uBlock leads on adoption by 3,934% (67,937 vs 1,684 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 13%. 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 | ★ 68K | ★ 1.7K |
| License | GPL-3.0 | MIT |
| Written in | JavaScript | JavaScript |
| Last push | 2026-09-17 | 2025-12-29 |
| Forks | ⑂ 4.4K | ⑂ 227 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick uBlock if
- You weight community size — 68K 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
uBlock Origin is a CPU and memory efficient, wide spectrum content blocker for Chromium and Firefox, aimed at anyone who wants ads, trackers, coin miners, popups, anti blockers and malware sites neutralised by default without hand tuning anything.
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 by…
read the full markdown-viewer overview →
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Frequently asked questions
Is uBlock or markdown-viewer more popular?
uBlock has 67,937 GitHub stars and markdown-viewer has 1,684. 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 (67,937 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.