Compress PDF to 200 KB is a specific ceiling, usually from a visa form, a job portal, or a mailbox that rejects anything larger. This page opens with that target selected. The engine is the compress PDF tool. It redraws each page as a JPEG, starting at a clearer setting and stepping down only as far as it must. The first result at or under 200 kilobytes is the one you download, so a file that fits at a mild setting is not ruined just to land near the ceiling.
200 KB is 200 × 1024 bytes in the check, not a rounded slogan. A result of 180 KB counts as success. A result of 260 KB does not, and the note will say the smallest attempt is still above the target. You can download that attempt and look at it. If the words have fallen apart, the honest outcome is that this document cannot be both readable and under 200 KB by turning pages into pictures. Print to a lower-resolution scan from the original papers, or ask the form whether a higher limit exists. This page will not pretend.
Text stops being text. Budget for that before you submit the file to an office that might copy a sentence from it. Scans of passport pages and photo pages are the usual case that fits. A 40-page colour brochure may not reach 200 KB without becoming illegible, and the 25-page cap on this tool would stop you earlier anyway. The file is not uploaded. Change the menu if you meant 100 KB or no particular number. Reduce PDF size is the same compressor without a preset ceiling.
Keep the original PDF. The download is named as a compressed copy and does not replace the file you picked. If you still need to join two small scans before you chase 200 KB, do that on merge PDF first, then come back. Photographs that are not PDFs yet start on JPG to PDF.