KaTeX
Ranked 2 of 3 math rendering libraries by recommenders
Fast, lightweight library for rendering LaTeX math on web pages and server-side, with MathML included for accessibility. Critics say it lacks features for serious mathematical exposition.
Fast, lightweight library for rendering LaTeX math on web pages and server-side, with MathML included for accessibility. Critics say it lacks features for serious mathematical exposition.
17 people gave an opinion
- recommend it
- 11
- criticize it
- 6
- approval share
- 65%
Recommended in 3 of 13 months
- November 2025: recommended
- December 2025: not recommended
- January 2026: not recommended
- February 2026: not recommended
- March 2026: recommended
- April 2026: not recommended
- May 2026: recommended
- June 2026: not recommended
- July 2026: not recommended
- August 2026: not recommended
- September 2026: not recommended
- October 2026: not recommended
- November 2026: not recommended (month in progress)
Why it doesn’t carry the badge
- 11 people recommend itNeeds 10 or more, met.
- 1.8 recommenders for every criticNeeds 2 to 1 or better, not met.
- Recommended in 3 of 13 monthsNeeds 4 or more, not met.
The same three rules apply to every product, and the badge can’t be bought. How the badge works
What people say about it
The reasons people give, with the number of comments that give each one. Open a reason to read what they said.
Why people recommend it
Each mark is one comment
Fast, lightweight rendering
“I use KaTeX for my blog, and indeed KaTeX was faster than MathJax 2”
Comment from 3 Nov 2025 on Hacker News “It uses KaTeX for fast rendering and it is lightweight.”
Comment from 5 Mar 2026 in “Show HN: PyMath Preview – preview LaTeX math in Python docstrings inside VS Code” Good spacing and rendering quality
“Since KaTeX produces the spacing and rendering quality I am happy with, out of the box, I have continued using it.”
Comment from 3 Nov 2025 on Hacker News “the KaTeX output is consistently better”
Comment from 8 May 2026 in “RaTeX: KaTeX-compatible LaTeX rendering engine in pure Rust” Easy to integrate into pages
“KaTeX makes an acceptable (to some) compromise by packaging this stuff up in a form where it can be run server side and is easy to integrate on a simple web page”
Comment from 3 Nov 2025 on Hacker News “It was easy enough to hook into pulldown_cmark, so that $ and $$ and render a decent subset of LaTeX.”
Comment from 3 Nov 2025 on Hacker News
What people warn about
Each mark is one comment
Slow or failing on large documents
“"Page complete" never stops with either library for me. It just keeps counting milliseconds.”
Comment from 4 Nov 2025 on Hacker News “very unstable, frequently failing at rendering large documents with many equations”
Comment from 5 Nov 2025 on Hacker News
Other math rendering libraries people recommend
The two most recommended other math rendering libraries, with the same counts for each, so you can compare like for like. The tick on each bar marks the 2 to 1 line the badge needs.
See all 3 math rendering libraries, rankedWhat people said
19 of the 20 comments that mention it, newest first. Each links to the original comment.
“the KaTeX output is consistently better”
“Why is it so hard to simply render an image from KaTeX?”
“KaTex has accessibility via MathML included”
“KaTeX bundles fonts and assumes they load cleanly”
“It uses KaTeX for fast rendering and it is lightweight.”
“very unstable, frequently failing at rendering large documents with many equations”
“"Page complete" never stops with either library for me. It just keeps counting milliseconds.”
“some KaTeX formulas act dead unless you start selecting outside them”
“We faced many challenges, especially with how different AI models syntax formulas”
“Since KaTeX produces the spacing and rendering quality I am happy with, out of the box, I have continued using it.”
“the feature set, whenever I've looked over the years, doesn't seem geared toward serious mathematical exposition”
“they get you closer to the typesetting quality of LaTeX compared to MathML”
“we still need a KaTeX equivalent, which compiles either LaTeX equations or other markup languages to MathML”
“So far, it has been working out well.”
“It was easy enough to hook into pulldown_cmark, so that $ and $$ and render a decent subset of LaTeX.”
“Every SSG seems to have the problem of having to depend on node in order to prerender html for math with katex”
“KaTeX makes an acceptable (to some) compromise by packaging this stuff up in a form where it can be run server side and is easy to integrate on a simple web page”
“I use KaTeX for my blog, and indeed KaTeX was faster than MathJax 2”
“You can quickly get 200kB+ pages by pre-rendering.”
Counts come from 1,795,640 Hacker News comments, November 2025 to November 2026. How we count. Report a mistake.