Compress PDF to 200KB — Free, Fast & Private
"PDF, maximum 200 KB" is the kind of line an application form prints beside its upload button; read your own form for its exact figure. The scanner or phone that made your PDF did not know about the limit, so the file is usually several megabytes. This page closes that gap in the browser. The target is set to 200 KB when the page loads, and the tool reports the real size of what it made rather than an estimate.
Portals differ, and some state their limit only in the small print next to the upload box. Read your own form's number before you start. If it says something other than 200 KB, the target chips above also offer 100 KB, 500 KB, 1 MB and no limit.
"Smaller" and "under 200 KB" are different jobs
A plain compressor applies one quality level and hands back whatever size falls out. That is fine when you just want a lighter file, and useless when a form has a hard ceiling, because you cannot tell in advance whether the result will pass. With a target set, this tool works the other way round. Every page is rendered and re-encoded as a JPEG with its original page size kept, and a byte search chooses each page's JPEG quality so the whole document fits the budget. If a page cannot fit on quality alone, its image is also reduced in pixel dimensions, in steps, while the page keeps its exact size. Then the assembled PDF is measured against 200,000 bytes — the kilobyte here is decimal, which also clears a form that counts 1,024 bytes to the kilobyte.
The budget belongs to the whole file, and the PDF's own structure takes a few kilobytes of it before any page does. That is why the tool measures the finished document instead of adding up page sizes and hoping. The size readout you see divides by 1,024, so a result that meets the target shows a number under 200 KB: the measured run below, 198,906 bytes, reads as about 194.2 KB (198,906 ÷ 1,024). Both figures describe the same file.
Because each page is searched on its own, a page that is mostly white paper and a page carrying a photograph are not forced to the same quality setting. The budget is also settled as the document is built: a page that comes in under its share leaves the surplus to the pages after it, and a page that overruns is paid for by them. No extra encoding is needed for that, so it costs nothing in time.
How far 200 KB stretches
Divide the budget by the page count for a rough idea of what each page gets:
| Pages | Roughly per page |
|---|---|
| 1 | 200 KB |
| 4 | 50 KB |
| 8 | 25 KB |
| 20 | 10 KB |
A real four-page scanned PDF of 8,538,448 bytes (8.1 MB as the tool shows it) came out at 198,906 bytes on this target when we ran it on the built site, in 7 to 9 seconds in Chromium on a laptop — about 50 KB a page. That is one measurement of one file, not a guarantee for yours. Open the result and zoom into the smallest text before you submit; the size proves the file fits, and only your eyes can say it is still readable.
When the tool cannot reach 200 KB
A long or photo-heavy scan can have a floor above 200 KB. When that happens a red notice says the 200 KB target was not reached, gives the smallest size the PDF could be made, and says plainly that an upload form enforcing 200 KB will refuse it. If that smallest file is still smaller than your original you can download it; if it is not smaller, nothing is offered and your original is the better file. The useful next step is fewer pages — drop blank backs and cover sheets, or split the document if the form has separate upload boxes.
Two other things to know. Colour comes back as standard sRGB on a size target, so a strongly saturated photo can look slightly duller; for ordinary scans you will not notice. And the method turns every page into an image, so selectable text does not survive. On a scan that changes nothing. On a PDF exported from a word processor, the text becomes part of the picture and the file may even grow; the tool checks the first pages and warns you before it runs.
Your document stays on your device
The files that meet a 200 KB limit are usually personal: identity papers, mark sheets, certificates, signed forms. Rendering, re-encoding, the byte search and the rebuild all happen in this browser tab, and the PDF is never uploaded. There is no account and no queue; the trade is that the work runs on your own device, so a long document on an older phone takes longer. Your original file is only read, never changed, so if the result is not good enough you can try again with fewer pages or a looser target.
If the target is stated in kilobytes, reduce PDF size in KB covers it.