C
CodeMirror
codemirror.net
Extensible code editor component for the browser, rewritten as modular CodeMirror 6 in 2022.
L
Lezer by Marijn Haverbeke
Incremental LR parser system that powers syntax highlighting and analysis in CodeMirror 6.
Visit Lezer ↗About Lezer
Incremental LR parser system that powers syntax highlighting and analysis in CodeMirror 6. Lezer is a developer tools product built by indie maker Marijn Haverbeke, launched in 2019.
- Status
- Active
- Launched
- 2019
- Category
- Developer Tools
- Website
- lezer.codemirror.net
More products by Marijn Haverbeke
P
ProseMirror
prosemirror.net
Toolkit for building schema-based rich-text editors on the web, with collaborative editing support.
E
Eloquent JavaScript
eloquentjavascript.net
Free online JavaScript textbook, published in print by No Starch Press and now in its fourth edition.
Acorn
github.com
Small, fast JavaScript parser written in JavaScript and used across the build-tool ecosystem.
W
Wordgard
wordgard.net
Semantic rich-text editor library released in 2026, built on lessons from ProseMirror.
Crowdfunded JavaScript code-analysis engine that provided editor autocompletion and type inference.
Lezer FAQ
What is Lezer?
Lezer is a developer tools product: Incremental LR parser system that powers syntax highlighting and analysis in CodeMirror 6.
Who made Lezer?
Lezer was made by Marijn Haverbeke, Creator of CodeMirror, ProseMirror and Acorn; author of Eloquent JavaScript. It launched in 2019. Marijn Haverbeke has also built CodeMirror, ProseMirror, Eloquent JavaScript, Acorn.
Is Lezer still active?
Yes. As far as IndieMakerList knows, Lezer is still active and run by Marijn Haverbeke at lezer.codemirror.net.
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