Compress PDF to 1MB for an email attachment, an e-filing or tender site, or any upload field with a 1 MB limit. Target size is already 1,000 KB on this page, so you just add the PDF and click Compress. At this size many PDFs can keep 150 DPI images and fully selectable text. It all happens in your browser — nothing is uploaded.
Target size opens at 1,000 KB, a full million bytes. That fits the limit whichever way a site counts 1 MB.
Scanner apps keep every page as a large photo. Recompressing those photos is where most of the saving comes from.
When a PDF cannot be made any smaller, you get the original back unchanged instead of a heavier copy.
The tool runs in mobile browsers. PDFs can be up to 100 MB on a phone or tablet and 200 MB on a computer.
Supporting documents for an email or a portal that accepts files only up to 1 MB each.
An application pack scanned page by page with a phone, which comes out at several megabytes.
Tax, court or tender sites where every attachment must be 1 MB or less.
Drop it on the box or click Choose PDF.
Target size reads 1000. Lower it only if the site's limit is tighter than 1 MB.
Click Compress and download the result once the new size is under 1 MB.
Websites do not all count the same way. Some define 1 MB as 1,000,000 bytes, others as 1,048,576. This tool counts 1 KB as 1,000 bytes, so the 1,000 KB preset stays within both.
Windows counts in 1,024s, so File Explorer may show the result as about 977 KB. Nothing is wrong: it is the same file, and it still passes a 1 MB limit.
Phone scanner apps save each page as a photo of several megapixels, so a document of a few pages easily runs to several megabytes. Almost all of that is image data — exactly what the Recommended level recompresses. At 150 DPI an A4 page image is 1,240 × 1,754 pixels, far smaller than a phone camera frame, so the first step alone usually removes most of the size.
Choose the PDF, then press Compress. Because 1,000 KB is already entered, the result is the sharpest version that comes in under 1 MB.
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