Check your machine
See whether your machine runs the PDF & image tools smoothly right in the browser. Every check runs on your machine — nothing is sent anywhere.
Machine specs (read automatically)
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Measure real speed (benchmark)
Run a heavy computation that mimics image processing to measure your machine's real speed. Takes a few seconds; the screen may briefly freeze.
Test the warning for a file
Pick a file to see whether it counts as “heavy” for your machine. Reads the size ONLY — no content is opened, nothing is sent.
Every check runs right in your browser — no information is sent to a server.