CudaText is a free, open-source cross-platform code editor with Python plugins and 300+ syntax lexers. See its features, pros, cons, and use cases.
Category
Productivity
Pricing
Free and open source under the Mozilla Public License 2.0, usable for personal and commercial purposes at no cost, from Free
Verified
Not yet
Last updated
July 19, 2026
Founded
2015
Headquarters
Not applicable, open-source project with its lead developer based in Russia
Origins and licensing
CudaText was created by developer Alexey Torgashin around 2015 as the successor to his earlier Windows-only editor SynWrite, after that project's development was discontinued. The editor's core is written in Object Pascal using the Lazarus IDE.
It is released under the Mozilla Public License 2.0, making it free for both personal and commercial use, with its source code publicly maintained on GitHub.
Core editing features
CudaText ships with more than 300 bundled syntax lexers, a code tree panel for viewing file structure, code folding, multiple carets and selections, regular-expression find and replace, and the ability to split the editor window into up to six groups of tabs.
It also includes a fuzzy-matching command palette, minimap and micromap navigation aids, and a binary and hex viewer capable of opening files of effectively unlimited size, including multi-gigabyte logs.
Extensibility through Python plugins
The editor's defining feature is its Python-based add-on system, which covers plugins, linters, custom code tree parsers, and external tool integrations, giving it functional depth well beyond its lightweight core.
It ships with several preinstalled plugins, including a Project Manager for multi-file project organization and a Snippets system compatible with the Visual Studio Code snippet format.
Key Features
300-plus syntax lexers — Built-in syntax highlighting covering a very wide range of programming and markup languages.
Code tree and code folding — Displays file structure such as functions and classes, where the lexer supports it, alongside collapsible code folding.
Multi-caret and multi-selection editing — Edit multiple points in a document simultaneously with support for regular-expression find and replace.
Split window layouts — Divide the editor into two, three, four, or six groups of tabs for working across several files at once.
Python plugin system — Extend the editor with plugins, linters, custom parsers, and external tool integrations written in Python.
Command palette with fuzzy matching — Execute editor commands quickly by typing partial matches of their name.
Minimap and micromap — Visual overview panels for navigating large files quickly.
Binary and hex viewer for huge files — Open and inspect files of effectively unlimited size, including multi-gigabyte logs.
Pros & Cons
Pros
Fast startup time and low resource usage even with many plugins loaded
Free for both personal and commercial use under the Mozilla Public License 2.0
Highly extensible through a Python-based plugin system
Native builds for Windows, Linux, macOS, and FreeBSD
Actively maintained on GitHub with a regular release history
Cons
Smaller plugin ecosystem than mainstream editors like Visual Studio Code or Sublime Text
Lacks deep language server protocol and IntelliSense-style integrations found in modern editors
Interface design is more utilitarian than polished compared to newer competitors
Documentation is largely community-driven and less comprehensive than commercial alternatives
Some plugins require a separate Python installation to function
Frequently Asked Questions
Is CudaText free
Yes, CudaText is free and open source under the Mozilla Public License 2.0, usable for personal and commercial projects at no cost.
Who created CudaText
CudaText was created by developer Alexey Torgashin as the successor to his earlier editor SynWrite.
What programming language is CudaText written in
CudaText's core is written in Object Pascal using the Lazarus IDE.
Does CudaText support plugins
Yes, it supports an extensive Python-based plugin system covering linters, code tree parsers, and external tool integrations.
What platforms does CudaText support
CudaText has native builds for Windows, Linux, macOS, and FreeBSD.
How many languages does CudaText support for syntax highlighting
CudaText ships with more than 300 built-in syntax lexers covering a wide range of programming and markup languages.
Can CudaText open very large files
Yes, its built-in binary and hex viewer can handle files of effectively unlimited size, including multi-gigabyte logs.
Is CudaText a good replacement for SynWrite
Yes, CudaText was created specifically as the successor to SynWrite after that editor's development was discontinued.