Whether your PDF is too large to email, too large to upload to a form, or just taking ages to open — here's the fastest way to fix it.
Go to pdfeditor.onl/compress-pdf, upload your large PDF, choose the Good or Strong compression level, and click Compress. Most PDFs are reduced by 40–90% in under 10 seconds.
If the file is still too large after compression: (1) Check if the PDF contains many high-resolution images — use Strong compression. (2) If the PDF has many pages, split it into smaller sections using the Split tool. (3) If you only need certain pages, extract just those pages first, then compress.
Tip: A 100 MB scanned document compressed with Strong compression typically comes down to under 15 MB — well within most email and form upload limits.
The most common causes are high-resolution scanned images, uncompressed photos embedded in the document, and accumulated metadata from repeated editing.
Gmail allows 25 MB. Outlook defaults to 20 MB. Most web form uploads accept between 5–25 MB depending on the platform.
Not precisely — compression ratio depends on content. Try Good compression first, check the output size, then switch to Strong if more reduction is needed.