How to compress a PDF to under 1MB
- Drop your PDF in. The 1 MB target is preselected.
- Click Compress. Images are re-encoded at a sensible resolution. Text and vectors are left alone.
- Download. The before and after sizes are both shown, along with the percentage saved.
Most files clear 1MB on the first pass
When a mail server bounces a 14 MB attachment, it feels like something in the document will have to go, when usually nothing does. The PDFs that miss a 1 MB ceiling are nearly always carrying camera-resolution images: a 4000-pixel photo printed three inches wide, times however many pages. Scale those to the size the page actually shows and 80 to 95 percent of the file disappears with no visible change and nothing rasterized.
What quality survives at this ceiling
Of the common targets, a megabyte is the one where you generally give nothing up. Images can stay at a resolution that holds together in print, not just on screen, so this is the right ceiling for documents that still have a life ahead of them: a portfolio someone will zoom into, a signed contract that will be printed and filed, drawings a builder will squint at. Where the destination is an inbox rather than a portal, how to email a PDF that's too big covers the other half of the problem, including why mail servers count attachments as bigger than they are.
When 1MB still isn't enough
A handful of documents resist. Hundred-page scans at 600 DPI, engineering drawings with enormous vector paths, PDFs with an embedded font for every weight of three different typefaces. Two things help before you reach for Extreme mode: splitting the file, since a per-file cap applied to three smaller documents is three times the budget, and stripping metadata and attachments, which occasionally turns out to be most of the weight. Why is my PDF so large goes through how to tell which case you have.
Going the other way, tighter ceilings have their own tools: 500 KB, 200 KB for job applications, and 100 KB for the portals that insist.
Who needs a PDF under 1MB
- Email attachment policies: mail servers and DLP rules that bounce anything heavier.
- Course and LMS uploads: assignment submissions with a per-file cap.
- Shrinking a large scan: high-DPI scans routinely drop 10–30× with nothing visibly lost.
- Shared drives and ticket attachments: keeping a document light enough that nobody has to think about it.
Frequently asked questions
How do I get a PDF under 1MB?
The 1 MB target is preselected, so it's drop, Compress, download. At this ceiling most multi-page documents keep excellent visual quality.
What kinds of files need the 1MB limit?
Email attachment policies, mostly. Also LMS and course-portal uploads, tender and procurement systems, CMS media limits. It's the roomiest of the common ceilings and usually reachable with no visible quality loss at all.
My PDF is 50MB of scanned pages. Realistic?
Often, yes. A high-DPI scan carries far more resolution than reading or printing will ever use. Re-encoding at a sensible one regularly shrinks scan-heavy files 10–30×. And if standard mode still can't reach 1MB, Extreme mode will.
Is there a file size limit on what I can compress?
None that we impose. The work runs on your own hardware, so its memory is the only real ceiling. Above roughly 150MB you'll see a soft warning, and splitting the file first tends to help.