Developer Tools
Extract CSS Font Sizes
Extract CSS font-size values from pasted stylesheets, style blocks, and component CSS without rendering, fetching, or uploading code.
0 / 30,000 characters. No upload, storage, or account required.
CSS font-size extraction workflows
Use this extractor when pasted styles need a browser-local inventory of type-scale values before responsive QA, migration, cleanup, or documentation.
Audit type scales
Pair font-size rows with Extract CSS Font Families, Font Size Unit Converter, and Extract CSS Variables.
Review responsive typography
Use Extract CSS Media Queries, Extract CSS Property Names, and CSS Formatter alongside font-size inventories.
Clean copied output
Send extracted rows to Remove Duplicate Lines, Sort Lines, or Normalize Whitespace.
What this tool does
Extract CSS Font Sizes finds font-size declaration values such as rem, px, clamp(), and token variables in pasted CSS, removes duplicate rows, shows source lines, and runs locally in your browser.
Common use cases
Extract font-size declaration values from pasted CSS, style blocks, component styles, responsive theme files, or copied source before type-scale audits, migration, QA, or documentation cleanup.
Use Extract CSS Font Sizes 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, style tags, component styles, theme files, or copied source that contains font-size declarations.
- Choose whether duplicate size rows should be removed and whether output should be normalized for comparison.
- Review extracted font-size rows with source lines, then copy the clean list for type-scale audits, migration notes, QA, 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 font-size extraction runs locally in your browser. Your pasted CSS is not uploaded, rendered, fetched, crawled, executed, stored, or logged.
FAQ
Does Extract CSS Font Sizes compute rendered font sizes?
No. It extracts font-size declarations from pasted CSS text. It does not render layouts, fetch assets, upload, store, or log snippets.
What font-size values can it find?
It finds normal CSS declaration values such as px, rem, em, %, clamp(), calc(), CSS variable references, and token names exactly as written.
When is this useful?
Use it while auditing type scales, responsive typography, design-system tokens, CSS migrations, 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.