Compress a PDF to 1 MB
1 MB is generous enough for a real multi-page document, which changes the question from what to sacrifice to whether anything needs sacrificing at all.
Where 1 MB comes from
- University and scholarship applications submitting a full transcript.
- Government portals that accept a combined document rather than one file per page.
- Courts, registries and professional bodies filing signed paperwork electronically.
What actually fits in 1 MB
Worked out from what this tool produces, not from a rule of thumb. Where a row says no, it says what to do instead.
| What you have | Fits in 1 MB? | What it takes |
|---|---|---|
| Any text-only document, up to about 40 pages | Comfortably | The lossless pass; nothing is re-encoded |
| Eight to ten scanned pages, greyscale | Yes | Around 140 dpi |
| Five or six scanned pages in colour | Yes | Around 140 dpi |
| A transcript with a seal and signatures | Comfortably | Enough room to keep the seal legible |
| A 30-page scanned report | Tight | Around 90 dpi — readable, but do not expect to read the footnotes |
At 1 MB most documents never need their pages touched. The lossless pass is tried first and frequently finishes the job on its own, which is the only outcome where nothing at all is lost.
If you are combining documents to meet a single 1 MB limit, compress the combined file rather than each part: one pass over the whole thing beats several passes that each lose a little.
Questions
- Is 1 MB enough for a scanned transcript?
- For most, yes. Eight to ten greyscale pages at around 140 dpi fit comfortably, and that is sharp enough for a registrar to read a grade and a stamp. A colour scan of the same document takes about twice the room, so scan in greyscale unless the colour means something.
- My file is 1.1 MB and the limit is 1 MB. What is the least damaging fix?
- Run it at the 1 MB target and let it try the lossless pass — a file that close usually gets there on structure alone, with every page untouched.
A different limit?
Every one of these opens the same tool with a different number in the box. If the limit you were given is not here, open Compress PDF and type it in.