Most email services limit attachments to 10–25 MB. If your PDF is too large to send, you can reduce its file size in seconds without any software — here's how.
PDFs grow large because of high-resolution embedded images, scanned pages saved as uncompressed bitmaps, or embedded fonts and metadata. All of these can be optimized without visibly affecting the document.
Visit pdfeditor.onl/compress-pdf. No account or download required — the tool runs entirely in your browser.
Upload your oversized PDF and select the Good compression level. This setting reduces most PDFs to well under common email limits while keeping text sharp and images visually clean.
Tip: Gmail's limit is 25 MB. Outlook's default is 20 MB. After compressing, check the result size shown on screen before downloading.
Download the compressed PDF and attach it to your email as normal. If the file is still too large, repeat with the Strong compression setting for maximum size reduction.
Gmail allows attachments up to 25 MB. For files larger than this, Gmail automatically converts the attachment to a Google Drive link.
At the Good compression level, the difference is minimal and usually not noticeable on screen. Text remains crisp; images may show slight JPEG compression at close inspection.
Yes. pdfeditor.onl works fully on iPhone and Android in Safari, Chrome, and Firefox.