Compress PDF to 1 MB
A free PDF compressor for 1 MB limits. The PDF stays under 1,000,000 bytes, so it passes however a website counts 1 MB. See the size, then download.
A free PDF compressor for 1 MB limits. The PDF stays under 1,000,000 bytes, so it passes however a website counts 1 MB. See the size, then download.
To compress a PDF to 1 MB, SafeResize turns the pages into lighter pictures until the file is 1,000,000 bytes or less, which is under 1 MB whether a website counts 1 MB as 1,000,000 or 1,048,576 bytes.
| 1 MB in bytes | 1,000,000 bytes, or 1,048,576 bytes when 1 MB is counted as 1,024 KB, as Windows does |
|---|---|
| 1 MB in KB | 1,000 KB, or 1,024 KB as Windows counts |
| The PDF you download | 1,000,000 bytes or less, so both counts accept it. Windows shows it as 976.6 KB or less. |
| Each page gets, shared evenly | About 100 KB with 10 pages, or 25 KB with 40 |
| Sharpness of each page | 150 DPI first, then 120, 96, 72, 56 and 45 DPI, stopping at the first that fits |
A limit of 1 MB is common on upload forms and for email attachments. Big scans, colour photos pasted into documents and PDFs saved from phone apps are the usual reasons a file goes over.
Websites count 1 MB in two ways: 1,000,000 bytes or 1,048,576 bytes. SafeResize keeps your file under 1,000,000 bytes, which passes both.
SafeResize keeps the file under 1,000,000 bytes. Shared evenly, that is about 100 KB a page for a 10 page document, and about 25 KB a page for a 40 page one. A colour phone scan of one page is often bigger than 100 KB, so a long document may need "Black & white".
It depends on the website. SafeResize aims for under 1,000,000 bytes, so the file is accepted under either rule.
A PDF that needs a password to open cannot be changed here. Open it in your PDF app, save a copy without the password, then try again.
No fixed limit, but very long PDFs take more time and memory, especially on older phones.