Syntax Theme Comparator
Compare three color themes for the same code. Preview how keywords, text and comments look before choosing a style.
How can I compare code color themes?
Paste the same code once and choose its language. Compare the three color themes side by side, then download the HTML comparison. Your code is displayed as text and is not run.
Your result
A little clarity, right here.
Start with your own content or load the example. Your result will appear here.
Three simple steps
How to use Syntax Theme Comparator
Choose your input and adjust the options.
Review the preview and run the tool.
Download the result and keep your original.
Common questions
Good to know
Understand the result.
Keep the original.
Is this tool free, and are my files uploaded?
This tool is free with no account required. The work happens in your browser. Your input and files are not sent to a processing server.
What are the limits and details?
Code cards support up to 300 lines and 160 columns. Fonts use local monospace fallbacks, so glyph appearance varies by device. Exports contain source text; remove secrets before sharing a card.
Limits: 500,000 characters per text field; files up to 20 MB each, 10 files and 50 MB total. Processing stops after 30 seconds.