PDFGym
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Compress PDF
to 800 KB

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

800 KB is 819,200 bytes, and almost nobody demands it exactly: people aim here because the real ceiling is 1 MB and they want to clear it on the first try. This page puts your PDF at that safe distance in the browser, verifies it before download, and uploads nothing.

Parking a file at 800 KB

  1. Pick the file

    Press Choose a PDF, or drag the file into the tab. It opens locally; expense scans and claim photos stay yours.

  2. Stay on the preset

    800 KB is already filled in here. If the box reads differently, pick a chip such as 500 KB or 1 MB, or type the precise number.

  3. Press Compress

    The rebuild and font passes run first and often finish the job alone at this roomy number; the image pass and the redraw wait in reserve.

  4. Confirm the margin, then save

    The result shows the final size against the original beside a preview. Press Download PDF when the pages read well; the filename gains a -compressed suffix.

How it works covers the four passes. To spend the full megabyte instead, the 1 MB page runs the same engine at the higher cap.

The expense report that bounced twice

Nadia consults for a logistics firm whose vendor portal caps uploads at 1 MB. Her quarterly expenses, expenses-q3-nadia.pdf, hold 6 pages of receipt scans at 5.2 MB. Her first attempt squeezed to 1,020 KB and bounced; her second hit 990 KB and bounced too, because the portal counts decimal megabytes and adds its own wrapper bytes.

Third attempt: this page at 800 KB. The file lands at 780 KB, clears every reading of the cap, and uploads first time. The receipts stay legible, the totals stay readable, and she learns the lesson this page exists to teach: pick your battles twenty percent below the line, not on it.

Silent rejections with generic errors are the signature of a too tight aim. Portals rarely confess which arithmetic they use, so margin is the only answer you control.

Why twenty percent under beats exactly at

A 1 MB ceiling is secretly two ceilings. The binary reading is 1,048,576 bytes; the decimal reading is 1,000,000. The 48,576 byte disagreement between them is exactly wide enough to swallow files their owners believed were fine. Add the wrapper bytes some systems add on receipt, and sitting on the line is gambling.

800 KB ducks under both readings with room to spare, so the file passes whatever the server believes a megabyte is. The visible cost is usually zero: text documents reach this number through font subsetting and the rebuild alone, with no pixel touched, and short scans land here at comfortable quality.

Mail is the exception that needs more, not less: encoding inflates attachments by roughly a third, which puts an 800 KB attachment near 1.07 MB in transit. Against a hard 1 MB mail ceiling, type 700 into the KB box instead. Against a 5 or 10 MB mailbox, 800 KB is plenty. 500 KB is the next deliberate step down when you want margin upon margin.

When even 800 KB fights back

A result above the number on a long scan means the pages outnumber the budget. Split the file by month or by claim and give each part the full 800 KB; per page quality jumps immediately. Blank and filler pages go first via Delete PDF pages, since each one donates its share to the survivors.

Locked originals stall the rebuild passes, so a scan that asks for a password needs Unlock PDF before it needs compression. And never judge from the thumbnail: open the preview at full zoom and read one receipt total. If the smallest figures read cleanly, the upload will too.

Cases for a different number

If the box genuinely allows the full megabyte and the pages are dense, spend it: 1 MB buys the maximum per page detail the cap permits. If the recipient only skims the pages on a phone, PDF to JPG pictures skip the document question. And if three separate proofs share one cap, split them into three comfortable files rather than starving one bundle.

Margin questions, short answers

Why 800 KB instead of the full 1 MB?
Because binary and decimal megabytes disagree by 48,576 bytes and servers add overhead. 800 KB clears both readings plus the wrapper, on the first attempt.
What does 800 KB weigh in bytes?
819,200, counting 1,024 bytes to the kilobyte. As a self chosen margin rather than a published cap, it sits safely below every reading of 1 MB.
Is 800 KB enough for receipt scans?
For a handful of pages, yes. Totals and dates stay readable; check the faintest receipt at full zoom before uploading.
Does the tool behave differently at this target?
No. All four methods race and every candidate faces the same page and character checks. A roomier target just lets the gentler methods win more often.
Will this work on my phone?
Yes, files this size are easy for a phone browser. Keep the tab open until the download finishes, since closing it ends the run.

Support acts for tight uploads

Trim, split, inspect or convert around the squeeze. Everything below runs in the tab and rechecks its output first.

Spend more, or spend less