Compress PDF to 800 KB
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800 KB is 819,200 bytes. People choose it as headroom under a 1 MB cap. It holds 55 text pages, 20 pages with pictures, 25 scanned pages, 40 phone photos of pages or 25 pages scanned in colour. Type 800, press Compress, and the tool keeps every word selectable.
How to compress a PDF to 800 KB
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Choose the PDF
Press Choose a PDF, or drop the file on the page. The file is read in this tab and is not sent anywhere.
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The target is already set
This page opens at 800 KB, so there is nothing to type. Pick a different level, or enter your own smaller number in KB, if you want another size.
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Press Compress
Four methods race: copy the pages into a fresh file, re-encode the placed images, cut each embedded font down to the glyphs the pages draw, and, only when no other method reached the target, redraw the pages as images with the text kept on top.
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Read the check, then download
Every candidate is opened again and its characters are counted against the source. The page shows the size, the method that won and the characters kept before it offers the download.
The four methods are described in full, with the measurements behind them, in how it works.
Why aim at 800 KB for a 1 MB cap
Systems round, add wrappers and count megabytes in different ways. A file of 819,200 bytes clears a 1,000,000 byte cap by 180,800 bytes. Mail encoding adds about a third, so 800 KB travels as about 1.1 MB. For a hard 1 MB mail limit, aim at 750 KB instead.
What fits in 800 KB
| Document | Pages at the default setting | Pages at the smallest setting |
|---|---|---|
| Text documents | Pages at the default setting55 | Pages at the smallest setting55 |
| Text with pictures | Pages at the default setting20 | Pages at the smallest setting20 |
| Scanned pages | Pages at the default setting25 | Pages at the smallest setting25 |
| Phone photos | Pages at the default setting11 | Pages at the smallest setting40 |
| Colour scans | Pages at the default setting8 | Pages at the smallest setting25 |
A 1 page phone photo scan from a public CC BY dataset went from 2.3 MB to 126 KB by re-encoding the placed pictures at 150 dpi. On the public files above 800 KB, the default methods cut the median file by 80.5%.
Long files at 800 KB
A long text document already shrinks to about 14 KB a page, so 800 KB holds a 55 page report. For a longer one, Split PDF divides it by page ranges, and each part gets the whole budget.
The 1 MB page covers the cap itself.
Questions
- Can I compress a PDF to 800 KB for free?
- Yes. The tool is free with no account needed and no cap on runs. The table on this page shows how many pages of each kind fit.
- How many bytes is 800 KB?
- 819,200 bytes at 1,024 bytes to the kilobyte. A system that counts in thousands reads the cap as 800,000. Set 780 KB to clear both.
- How long a text-only PDF fits in 800 KB?
- About 55 pages. A compressed text page weighed about 14 KB in the public run.
- Will I make a PDF under 800 KB without blurring charts?
- Usually. A vector chart is drawing commands, not a picture, and only the page redraw turns it into pixels. The result names the method that won.
Related tools
Each runs in a browser tab like this one, reads its own output back before the download, and needs no account. The footer links every tool.
- PDF size breakdown See where every byte goes
- Merge PDFs Several PDFs into one
- Organize pages Split, reorder, delete
- Rotate & crop Pages upright, margins cut
- Images to PDF JPG and PNG
- HEIC to PDF Open iPhone photos
Where to go next
- Compress PDF Make a PDF smaller without turning its text into a picture.
- Compress PDF to 500 KB Get this PDF under 500 KB, a limit common on job and grant portals.
- Compress PDF to 1 MB Get this PDF under 1 MB, the most common attachment and portal limit.
- How to reduce PDF file size Make a PDF smaller and know what got dropped.