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Analyze JavaScript bundle size impact with raw bytes, gzip estimate, and brotli estimate in one view.
Raw Size
0 B
Gzip Size
N/A
Brotli Size
N/A
Gzip uses browser CompressionStream. Brotli is an approximate estimate from gzip for quick budgeting.
All JavaScript processing runs locally in your browser. No code uploads.
Shrinkify’s Bundle Size Analyzer lets users measure JavaScript bundle size, gzip, and brotli estimates instantly in the browser. Processing is local for privacy and speed.
For users, this tool is perfect for developers and teams optimizing site performance. The interface is simple and efficient.
SEO and professionals benefit from smaller, faster JS bundles, improving site speed and rankings.
Yes. You can use Bundle Size Analyzer at no cost for standard workflows in-browser.
Yes. Standard flows process locally in your browser, so files are not uploaded as part of normal usage.
For typical usage, yes, they are useful for triage and fast feedback. For critical production incidents, combine them with deeper environment-level validation. This helps keep outputs consistent across different devices.
Practically speaking, input changes, environment state, or dependency context can affect output. Re-run with the same exact input snapshot when you need strict comparisons. That makes the result easier to verify before publishing.
In day-to-day use, prioritize high-impact findings first, fix them, then rerun analysis to verify improvement. This loop gives more reliable outcomes than one-off checks. This is usually the most reliable approach for repeatable results.
Check out our technical guides to learn more about how browser-side processing works.
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