Compress PDF to 200 KB — free, on your device

How to use Compress PDF to 200 KB

1. Add the PDF. The target is set to 200 KB, and you can change it if your form uses a different number.
2. Decide on colour. For certificates with a coloured seal, signature in blue ink or a photo, leave Black and white unticked.
3. Keep If needed, convert pages to images to reach the size ticked for scanned documents.
4. Press Compress to 200 KB.
5. Zoom into the preview to check that small print, roll numbers and seals are legible, then download.

What it does and when to use it

A 200 KB limit is common for education and job documents that run to a few pages: a degree certificate with its transcript, a set of semester mark sheets, an experience letter on letterhead, a migration or character certificate. These documents often carry things that matter to whoever checks them, such as an embossed or inked seal, a signature, a hologram printed in colour, or a photo.

This tool compresses the PDF to the largest size under 200 KB that it can reach, so you keep as much of that detail as possible. If your file already fits, it is returned unchanged, and if a lossless rebuild is enough, the pages are not touched at all.

Colour or black and white?

This is the one choice that changes the result most, and at 200 KB it deserves a moment’s thought.

You can run the tool twice and keep whichever result reads better. Each run starts again from your original file.

How it works

The compression runs in your browser using pdf.js to draw pages, pdf-lib to build PDFs and a WebAssembly build of qpdf for the lossless pass. Your file is not uploaded.

The steps are always the same. A file already under 200,000 bytes is left as it is. Otherwise the tool first repacks the PDF losslessly and keeps that version if it fits. Failing that, and with image conversion allowed, it renders each page and saves it as a JPEG. It starts at 150 DPI and adjusts JPEG quality between 35% and 85%; only if the lowest quality is still too large does it lower the resolution, to 120, 100, 85 DPI and so on. With 200 KB to spend, a short document can often stay at the higher resolutions, which is where small print remains easy to read.

Worked examples

Degree certificate plus a two-page transcript, scanned in colour. Three pages share 200,000 bytes, so about 66 KB each. With Black and white off, the seal and coloured border survive, and the tool lowers quality before it lowers resolution, which tends to keep text edges crisp. Check the transcript’s smallest print in the preview.

Four semester mark sheets. Each page gets about 50 KB. If the mark sheets are on tinted security paper, black and white can make the background lighter and the marks clearer; compare both versions before you upload.

A two-page experience letter typed in Word. If it was saved as a PDF directly from Word rather than scanned, it may already be under 200 KB, and the tool simply tells you so.

Limits and tips

• When pages become images, text is no longer selectable and links stop working. Keep the original for your records.
• Rotate sideways scans with the PDF Rotator before compressing so reviewers do not have to turn their heads.
• If the result cannot reach 200 KB, the tool shows the smallest size it managed. Removing a blank back page often makes the difference.
• For a stricter limit, try Compress PDF to 100 KB; if the form allows more, Compress PDF to 300 KB leaves extra room for detail.