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Drop one TIFF or two hundred. Batch conversion is not a paid feature here.
A scanner, a fax gateway or an archive handed over a TIFF, and it is too large to email and refuses to preview on a phone.
TIFF is a container that may hold uncompressed, LZW, ZIP, or even JPEG-compressed data, often at 16 bits per channel. All of that is normalised to an 8-bit RGB JPEG, which is usually a very large reduction in size.
TIFF can hold many pages in one file, and JPEG holds one image. A ten-page scanned TIFF becomes ten JPEGs, not one. If the TIFF is CMYK, it is also converted to RGB, and saturated colours will shift.
Archival scans are often 600 DPI, 16-bit, and uncompressed. Those three choices multiply fast.
Some, and it matters most for text. If the TIFF is a document rather than a photograph, convert it to PDF or PNG instead of JPEG.
Drop one TIFF or two hundred. Batch conversion is not a paid feature here.
JPEG Image is lossy, so the quality control decides the trade between size and fidelity.
Converted and deleted the moment it finishes. Never written to permanent storage.