Developer Tools
Extract CSS Variables
Extract CSS custom properties from pasted stylesheets or style blocks without rendering, fetching, or uploading code.
0 / 30,000 characters. No upload, storage, or account required.
CSS variable extraction workflows
Use this extractor when pasted styles need a browser-local list of design tokens or custom properties before theme cleanup, migration, QA, or documentation.
Audit design tokens
Pair this with Extract HEX Colors, Extract CSS Classes, and Extract CSS IDs.
Review CSS assets
Use Extract CSS URLs, Extract CSS Media Queries, and CSS Formatter alongside variable inventories.
Clean copied rows
Send copied output to Remove Duplicate Lines, Sort Lines, or Normalize Whitespace.
What this tool does
Extract CSS Variables finds --custom-property declarations in pasted CSS, pairs each variable with its value, removes duplicates, shows source lines, and runs locally in your browser.
Common use cases
Extract CSS custom property declarations from pasted stylesheets, design-token files, style blocks, component CSS, or copied source before theme cleanup, migration, QA, or documentation handoffs.
Use Extract CSS Variables when you are working with copied API payloads, logs, encoded values, config snippets, identifiers, or debugging data and need a quick browser-local check before pasting the result into docs, tickets, tests, or another developer tool.
How to use it
- Paste CSS, design-token files, style tags, component styles, or copied source that contains CSS custom properties.
- Choose whether duplicate variable rows should be removed and whether names and values should be normalized for comparison.
- Review variables with source lines, then copy the clean list for token audits, theme migration, QA notes, or documentation handoffs.
Example workflow
Copy a small payload or encoded value from an API response, request URL, log line, or config file. Run the focused check here, confirm the output is readable, then continue with related developer data tools such as validation, formatting, decoding, timestamp conversion, or CSV/JSON conversion.
Privacy note
CSS variable extraction runs locally in your browser. Your pasted CSS is not uploaded, rendered, fetched, crawled, executed, stored, or logged.
FAQ
Does Extract CSS Variables render or run CSS?
No. It reads pasted CSS text only and extracts custom property declarations. It does not render, fetch, crawl, execute, upload, store, or log snippets.
What does the output include?
Each row includes the custom property name and declared value, such as --brand-primary: #2563eb, with duplicate-removal and normalization options.
When is this useful?
Use it while auditing design tokens, documenting themes, migrating CSS variables, or cleaning copied style blocks before front-end QA.
Explore more tools
Browse the Developer Tools hub or continue with the Developer Data Toolkit when this task is part of a larger workflow.