Developer Tools
Extract CSS Env References
Extract env(...) references from pasted CSS for safe-area inset, viewport segment, and device environment audits without rendering, fetching, or uploading code.
0 / 30,000 characters. No upload, storage, or account required.
CSS env extraction workflows
Use this extractor when pasted styles need a browser-local inventory of safe-area and device environment references before mobile QA or documentation.
Audit mobile safe-area CSS
Pair this with Extract CSS Calc Functions, Extract CSS Var References, and Extract CSS Box Model Values.
Review responsive context
Use Extract CSS Media Queries, Extract CSS Container Queries, and CSS Formatter together.
Clean copied output
Send extracted rows to Remove Duplicate Lines, Sort Lines, or Normalize Whitespace.
What this tool does
Extract CSS Env References scans pasted CSS as text, lists env(...) references with source lines, removes duplicate rows, and runs locally in your browser.
Common use cases
Extract CSS env(...) references from pasted stylesheets, component CSS, mobile layout code, framework output, or copied source before safe-area audits, responsive QA, migration, or documentation handoffs.
Use Extract CSS Env References 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 stylesheets, component CSS, framework output, design-token files, or copied style blocks.
- Choose whether duplicate rows should be removed and whether output should be normalized for comparison.
- Review extracted env(...) rows with source lines, then copy the clean list for responsive layout, safe-area, QA, or documentation audits.
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
Extract CSS Env References runs locally in your browser. Your pasted CSS is not uploaded, rendered, fetched, crawled, executed, stored, or logged.
FAQ
Does Extract CSS Env References evaluate device safe areas?
No. It scans pasted CSS as text and does not read device values, render pages, execute code, fetch assets, upload, store, or log snippets.
Which env references are included?
It finds env(...) references such as env(safe-area-inset-top), env(safe-area-inset-bottom, 16px), and viewport-segment environment variables.
When is this useful?
Use it while auditing mobile safe-area CSS, responsive layout migrations, device environment usage, or documentation handoffs.
Explore more tools
Browse the Developer Tools hub or continue with the Developer Data Toolkit when this task is part of a larger workflow.