Compress a PDF so it fits email attachment limits
When a PDF will not go out as an email attachment, the problem is usually file size. Compress it first, split or extract pages if it is still too large, then add a password if the contents should stay private.
When a PDF will not go through as an email attachment
Gmail, Outlook, and many work inboxes cap attachments—often around 20–25 MB, and sometimes less on a phone. If the send fails or the file will not attach, shrink it before you try again.
A text-heavy report usually compresses well. A pack of scanned pages may not shrink enough; in that case, split the file or extract only the pages you need.
Compress the PDF first
Open Compress PDF in your browser, on a phone or a computer. There is nothing to install. Upload the file, compress it, and check the new size against your mail limit before you send.
If it is still too large, split or extract pages
Use Split PDF to break a long file into smaller parts, or Extract pages to keep only what the recipient needs. If you later want a single packet again, Merge PDF can combine the pieces. Photos can go in a separate PDF with JPG to PDF.
Add protection or your own mark before you send
If the file is confidential, protect it with a password after you compress it. You can also add page numbers, or a watermark you own, on a file that belongs to you. Do not use TidePDF to remove a watermark placed by someone else.
What happens to your file
These tools run in the browser; you do not need a separate app. Files are deleted after use: if processing never starts, they are removed after about 60 minutes; after the first view, after about 60 minutes; and in any case within about 24 hours. The privacy policy has the full detail.
Common questions
Do I need to install an app?
No. TidePDF runs in the browser on a phone or a computer.
Is compressing a PDF completely free?
Basic tools include a daily free allowance of 10 uses, which resets each day. That is not unlimited use. See the pricing page if you need more.
Can I password-protect the PDF after I compress it?
Yes. Compress first, then open Protect PDF and set a password before you send.
How long do you keep my file?
Unprocessed files are removed after about 60 minutes. After the first view, they are removed after about 60 minutes, with a hard limit of about 24 hours.
Who can I contact if something goes wrong?
Email szsoftwell2026@gmail.com.