Blog
Original guides that explain the methods, formats and limits behind Lutrakit tools.
Blog
Lutrakit is now available in French
See what is translated, how French URLs work and which browser-local privacy guarantees remain unchanged.
Pace, speed and finish time without unit mistakes
Convert running pace, speed and finish time with exact mile and kilometre units, worked examples, rounding checks and honest limits.
What a browser screen recorder can capture
Choose between a browser tab, an application window, and an entire display while limiting accidental exposure.
Meet image file-size limits without guessing
Choose quality or a best-effort byte target, then verify dimensions, format, metadata, animation and the downloaded size.
How Lutrakit processes files in your browser and how to verify it
See how Lutrakit keeps selected file bytes in the browser and reproduce a Network-panel no-upload check.
Merge PDFs safely: order, file size, bookmarks and verification
Merge ordinary PDFs in a deliberate order, then check page count, bookmarks, forms, signatures and file size.
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