How “compress to 200 KB” works
Most compressors apply one fixed setting and hope for the best. That’s why you often download a “compressed” file that is still 260 KB and get rejected by the portal again. This tool works the other way round: it starts from your limit and searches for the highest quality that fits under it, checking the real size of each attempt.
The search runs in steps, from gentlest to strongest:
- Lossless clean-up. Unused data, duplicate images and uncompressed sections are removed. Some files are already under the limit after this.
- Image recompression, text kept. Photos inside the PDF are downsized and re-encoded step by step; scanned pages are converted to crisp black-and-white. Your text stays real, selectable text.
- Converting the heaviest pages only. If the limit still isn’t reached, the page that takes the most space is turned into an optimised image, then the next heaviest, and so on, until the file fits. Pages that weren’t converted keep their selectable text.
The first step that produces a file under 200 KB wins, so you always get the best quality available for that size.
When 200 KB is impossible (and what we do)
Two kinds of files can’t always be squeezed under 200 KB honestly:
- Fillable forms. Converting a form page into an image would destroy its fields. We never do that. You get the smallest version that keeps the form working, and a clear note.
- Long text-heavy documents. A 15-page research paper is mostly fonts and text, which can’t be compressed the way images can. Shrinking it to 200 KB would mean turning every page into a blurry picture. Instead you get the smallest readable version. Splitting it and uploading only the pages the portal needs is often the better fix.
Tips for upload portals
- Upload only what’s asked for. Many portals want just the first page of a certificate or the photo page of a passport. Extracting it with Split PDF cuts the size before any compression.
- Photos of documents: if you have JPG photos rather than a PDF, convert them with JPG to PDF first, then compress here.
- Need 100 KB? Use the 100 KB version or type 100 into the Max size box.
- Check the preview. After compressing, page 1 is shown so you can confirm the document is still legible before you upload it.
Why black-and-white beats blur for scans
At 200 KB, a three-page colour scan stored as JPEG has to be compressed so hard that letters smear into blocks. The same pages stored as clean one-bit black-and-white keep every stroke sharp, because there is no paper texture or colour to store, only ink. For certificates, mark sheets, ID cards and signed forms, that is almost always what an official reviewer needs to see.
Frequently asked questions
Is the result really under 200 KB?
Yes. The tool checks the actual size of the finished file, not an estimate. If a file genuinely can't get under 200 KB without becoming unreadable or breaking its form fields, we say so clearly and give you the smallest readable version instead.
Can I use a different limit, like 150 KB or 250 KB?
Yes. Change the Max size box above the drop area to any value in kilobytes. The tool will aim for that limit instead.
Will my scanned ID or certificate still be readable?
That is the main goal. Scanned pages are cleaned up and stored as sharp black-and-white at the highest resolution that fits, which keeps small print readable far better than squeezing a colour photo.
Why do portals ask for 200 KB?
Government, exam and HR systems receive huge numbers of uploads and cap each file to keep storage and review manageable. 200 KB is one of the most common limits, along with 100 KB, 300 KB and 500 KB.
Is it safe for passports and official documents?
Yes. Your file is processed inside your browser and never uploaded. There is no copy on any server, now or later.