Compress a PDF to a target file size. Runs entirely in this tab — your file is never uploaded, so there is no size limit and nothing to trust.
Everything happens locally in your browser
Bare numbers mean MB. 3MB = 3,000,000 bytes;
3MiB = 3,145,728. The floor stops it degrading past legibility —
if the target needs more, it says so rather than quietly wrecking the scan.