PDFGym
EN

Compress PDF
to 3 MB

or drop one here
Compression level
Target size
Choose a PDF file first.

3 MB, or 3,145,728 bytes, is the working size for documents with photos: big enough for twenty sharp pages, small enough for most portals and inboxes. This page aims your PDF at exactly that number in the browser, verifies the result before download, and uploads nothing.

Landing a file at 3 MB

  1. Bring the PDF here

    Press Choose a PDF or drop the file onto the page. Photos and all, it opens in this tab only and travels nowhere.

  2. Stay on the preset

    3 MB is prefilled on this page, so just check the box reads 3 with MB beside it. For a different ceiling, tap a chip or type your own number.

  3. Press Compress

    The gentle passes, rebuild and font subsetting, run first; the image pass joins when they fall short, and the full redraw only when nothing else reached 3 MB.

  4. Judge the photos, then download

    The result states the final size and the saving beside a preview, with the method-by-method report in Details. Press Download PDF when faces and details look right; the file saves with -compressed added to its name.

The method-by-method tour is in how it works. When the source is far bigger than this number, read the large file guide before you start.

The quote pack that has to survive email

Marco runs a two person kitchen studio. A client asked for a quote pack by email: scope, price table and eight pages of material photos, currently kitchen-quote-marco.pdf at 14 MB. The client's mailbox bounces attachments over 5 MB, and Marco knows mail encoding inflates files by roughly a third on the way through.

He runs the pack here at 3 MB. The photos take a moderate re-encode, the text and price table stay pixel perfect, and the result lands at 2.8 MB, which travels through mail encoding and still clears the 5 MB ceiling with room to spare. The client replies the same afternoon, photos intact.

That is the natural habitat of this number: rich enough for photos, lean enough for mail. Twenty pages of mixed text and pictures each get about 150 KB, which reads as a good scan on any screen.

The encoding tax your mailbox charges

Mail does not send your bytes as bytes. Attachments ride encoded, which inflates them by roughly a third, so a 3 MB file occupies about 4 MB of the recipient's ceiling. A PDF aimed at 3 MB therefore clears 4 and 5 MB mailbox caps comfortably, while a file aimed right at 5 MB can bounce.

Portals have their own quirk: some count a megabyte as a flat million bytes instead of 1,048,576. Against a strict decimal 3 MB box, a binary 3 MB file overshoots by about 146 KB. If a portal already refused you once, rerun at 2.9 MB and the argument disappears. Stepping down to 2 MB ends the discussion entirely; stepping up to 4 MB buys visibly richer photos when the cap allows.

Fifty scan pages at 3 MB get 60 KB each: printed text holds, small print softens. A hundred pages get 30 KB each, which stops being pleasant. Count pages first, then pick the number.

What goes wrong at 3 MB

Overshooting the target on a scan means the per page budget ran out, not that the tool failed. Halve the page count with Split PDF and each half gets the full 3 MB to share. Soft photos at the target mean the same thing from the other side: fewer pages per run, or a roomier cap.

Text exports that barely change were already lean, which is good news wearing a boring disguise. And files that demand a password on open skip the rebuild passes, so clear them via Unlock PDF before judging the result. Compress from the master every time; a second squeeze of an already squeezed file stacks softness.

When a different move beats 3 MB

A gallery of photos with no real document around them travels better as pictures: PDF to JPG exports the pages directly. A file the recipient must print at full quality wants the master sent through a file sharing link instead of a diet. And a portal that accepts several files rewards splitting: three sharp 3 MB parts beat one starved file every time.

3 MB answers without the jargon

How many bytes is 3 MB in this tool?
3,145,728 bytes, counting 1,024 bytes per kilobyte and 1,024 kilobytes per megabyte. Decimal counters stop at 3,000,000, so use 2.9 MB after a refusal.
Is 3 MB enough for fifty scanned pages?
It is readable but tight: about 60 KB per page. Body text holds, footnotes and handwriting soften. Split the scan or raise the target for dense pages.
Can I run this on my phone?
Yes. Files around this size sit well inside what a phone browser handles, and the run works exactly as on desktop. Keep the tab open until the download finishes.
Do the photos stay good enough to forward?
Usually yes at this budget, which is generous per page. Zoom the preview to full size and check a face or a fine detail before downloading.
Does anything about my file leave the device?
No. The bytes move between your disk, the tab memory and your downloads folder. There is no account and no watermark.

Round out the job with these

Split oversized originals, inspect the weight, or export pictures instead. All local, all verified, none asking for an account.

Neighbouring targets and guides