How to Get a PDF Under 200 KB, 1 MB or 2 MB for Forms and Portals

A government portal wants a PDF "under 200 KB." A job application form caps uploads at 1 MB. Your email provider won't attach anything over 25 MB. These limits don't care how good your compression settings are — you either get under the number or the upload fails. This is a step-by-step order for getting there, and what to do when compression alone can't reach the target.

Check what you're actually starting from

First, find your current file size (right-click the file → Properties on Windows, or Get Info on Mac) and work out how far you need to go. Getting a 3 MB PDF under 2 MB is a small ask. Getting a 3 MB PDF under 200 KB is a 15x reduction, and no amount of quality-slider tweaking gets there without changing what's actually in the file. Knowing the gap up front tells you whether compression alone will do it, or whether you need to also cut content.

Is your PDF image-heavy or mostly text?

This decides almost everything about what will work. A PDF built from selectable text (a Word export, an invoice generated by software) is usually small to begin with — a few hundred KB even for dozens of pages — because text takes almost no space. A PDF built from photographed or scanned pages is a series of full images, and that's where a 200 KB target gets hard: a handful of phone-camera pages can easily run to several megabytes before any compression at all.

If you're not sure which you have, try selecting text in the PDF. If you can click and drag to highlight words, it has a real text layer and compression has less to work with (there may still be a photo or two embedded). If a whole page selects as one block, or nothing selects at all, it's an image.

Step 1: Compress

Start with the Compress PDF tool. It works by finding every JPEG-encoded image embedded in the PDF, redrawing it at a lower quality and (at the stronger settings) a smaller pixel resolution, and putting the smaller version back — the surrounding text and vector content is never touched, so it stays sharp and selectable either way. Try the strongest of its three levels first when you're chasing a specific target; you can see the exact before/after size and decide from there whether it's readable enough.

This is also where the tool's real limits show up, and they set a floor under how far it can take you:

• Only JPEG images are recompressed. Images stored in other formats inside the PDF (raw/flate-encoded pixels, CCITT fax-encoded scans, JPEG 2000) are left exactly as they are, because safely recompressing them needs a different approach. If your scanner or scanning app saves pages that way, this step alone may barely shrink the file — the result screen tells you how many images were actually recompressed versus left unchanged.
• Text and vector graphics are never touched — good for readability, but it means a text-heavy PDF (invoices, forms, reports) has little for this tool to shrink in the first place. If your file barely moves after compressing, this is usually why: there isn't much recompressible image data to begin with.
• It's a lossy step whenever images are recompressed. The result tells you plainly which case applied to your file.

Step 2: If the source images are still available, resize before rebuilding

If Compress PDF can't reach your target — most often because the images inside are in a format it skips, or because they're so large to start with that even 35% quality isn't enough — and you still have the original photos or scans as separate image files, go a level lower. Resize each one to a sensible pixel size with Resize Image (a page destined for screen viewing rarely needs more than about 1500–2000 px on the long edge), and use Image Compressor to bring the file weight down further, then rebuild the PDF with Image to PDF. Shrinking the source images directly gives you far more control than compressing an already-assembled PDF, since you're not limited to whichever image format the PDF happens to use.

Step 3: Split, if the portal allows more than one file

Some forms and portals accept multiple attachments, or ask for specific pages separately (just the signature page, just the ID document). If yours does, Split PDF can extract only the pages that are actually required into a smaller file, rather than compressing the whole document down to fit. This won't help if the portal insists on exactly one file, but it's often the fastest way to hit a tight limit when it's allowed.

When compression genuinely isn't enough

If you've compressed, resized the source images, and you're still over the limit, the content itself is too large for the target — there's no setting left that closes the gap without visibly reducing quality further:

• Re-scan or re-photograph at a lower resolution. A document scanned at 300 DPI is roughly 4x the pixel count (and file size) of the same page at 150 DPI, which is still perfectly readable on a screen. If you're scanning specifically for a small upload limit, scan low to begin with rather than compressing a high-resolution scan down afterward.
• Reduce the page count if some pages (a cover sheet, blank pages, an appendix) aren't strictly required.
• Ask if the limit is really per-file. Some portals that say "200 KB" actually mean per attachment, and accept several smaller files rather than one — worth confirming before you compress a document into illegibility.

Check readability before you submit

Open the compressed file at the size you'd normally view it — not zoomed in — and confirm any text, photos, or signatures are still clear. A file that's technically under the limit but illegible defeats the purpose. If a scanned document has become too soft to read at the target size, that's a sign the content needs to shrink (fewer pages, lower scan resolution) rather than pushing the compression setting even further.