Compress PDF for Email & Upload Limits

Compress a PDF for email or an upload limit

Use this tool when a scanned or image-heavy PDF is too large to email or submit. Choose one PDF, leave Compression level on Balanced quality, or pick Stronger compression or Maximum compression, then press Compress PDF. The result label shows the new size and whether the file got smaller or larger. The download keeps the original name with -compressed added, so lease.pdf becomes lease-compressed.pdf. PDF North does not promise a specific kilobyte or megabyte result. The photos and the page count decide that. There is no box that locks the file at a size you type.

Which PDFs are most likely to get smaller?

Scans, photo-filled documents and PDFs made from large images shrink most often, because each page is already a picture that can be redrawn smaller. Try to highlight a sentence. If the words select, the file is mostly typed text. Those files often barely change, and they can grow, because every page is rebuilt as a JPEG even when there was little image data to remove. A digitally exported contract, invoice or report should stay as it is unless a real cap has already refused it.

If the file is large because it contains pages you will not send, remove them first. Delete PDF Pages drops blank backs. Extract PDF Pages keeps a range such as 1-3, 8. Split PDF cuts the document into consecutive parts. Each part is its own PDF download, not a zip. Compress the shorter file afterwards. Compressing unused pages spends clarity on sheets nobody will open. A long colour scan that is still over a portal cap after that belongs on compress a scanned PDF, which walks through deleting blank backs and rotating sideways sheets before you flatten them.

Choose the right compression level

The menu has three choices and nothing else. Balanced quality is selected when the page opens. Stronger compression and Maximum compression redraw the page more coarsely. That is what the note under the menu means by reducing page resolution. There is no greyscale switch, no DPI field, and no slider that forces 1 MB, 2 MB or any other size. Start at Balanced quality and open the download at normal reading size. Move to Stronger compression only when a destination still refuses the file and stamps, signatures and small type are still legible. Maximum compression is for a remaining gap you can still read. Keep the original until that copy is accepted.

What compression changes

The browser draws each page onto a white background and stores that picture as a JPEG inside a new PDF. The new page keeps the source width and height, so an A4 sheet stays A4 and a US Letter sheet stays US Letter. The tool changes how the page is stored, not the paper size. Selectable text, links and form fields are removed. An existing text layer from optical character recognition is removed too. This tool does not add OCR, and it does not pull the words out. Extract text from a scanned PDF is the honest limit for a picture of a page. Password-protected PDFs are not supported. The workspace accepts one file at a time, up to 60 MB and 250 pages.

Match the file to the limit that actually failed

A single compress button does not tell you whether Gmail, Outlook, a chat app or a form rejected the file. The figures below are the published or commonly stated caps already used on PDF North’s guides. They are not a promise that your mailbox, workplace or form uses the same number, and they are not a size this tool can force. Encoding can still bounce a file that looks just under a published ceiling, because the message counts more than the PDF on disk.

Do not flatten a 3 MB typed report because you are about to use Gmail or Outlook. Compress photographed pages that missed the cap you actually hit. Changing the sheet to A4 or Letter does not remove megabytes. Use Resize PDF Pages only when the destination named a paper size.

A worked example: an 18 MB phone scan

A colour scan of a 12-page lease, photographed on a phone, is 18 MB and named lease.pdf. Two of those pages are blank backs. Delete those first, so ten pages remain, and rotate the stack if the type is sideways. Open Compress PDF, leave Balanced quality selected, and press Compress PDF. The download is lease-compressed.pdf. Read the labelled size beside it. If a job portal still wants about 2 MB and the stamps are readable, run the ten-page file again at Stronger compression and compare the new label. If Maximum compression gets under that portal cap but a name is unreadable, stop and extract the signed page instead of uploading a blur. If the same 18 MB file is going through Gmail, 18 MB is already under the 25 MB ceiling, so leave it alone unless Compose has refused it. A typed lease you can highlight is a different file: merging or extracting pages keeps the text, and compression would throw that text away.

Private compression in this browser

The selected PDF is read and rebuilt in this tab. PDF North does not receive the document, store a cloud copy or add it to an account. The compress step does not post the file. You can confirm that in the browser’s Network tab while the job runs: the PDF is not sent as an upload. The device still has to hold the pages in memory, so a long colour scan can fail on a phone before the 60 MB or 250-page caps. Close other heavy tabs if the status stalls, or extract a shorter selection and try again. The original on your device is not overwritten. Open the download before you attach it.

Organise the packet before you compress it. Merge PDF copies pages and does not shrink them, so join the files you will send, then compress that one download if a cap remains. Reorder PDF Pages belongs before compression too. A later edit will not restore selectable text you have already flattened. Add an electronic signature only on the copy you will file, and keep the untouched source until the destination has accepted the smaller file.

Frequently asked questions

Will PDF compression keep my text selectable?

No. Compress PDF redraws every page as a JPEG on a white sheet of the same width and height. Selectable text, links and form fields are removed. A scan that was already a picture had no text layer to keep. A report you can highlight should stay uncompressed unless a size cap has already refused it. Keep the original.

Which compression level should I start with?

Start with Balanced quality, open the download at normal reading size, and read the new size in the result label. Stronger compression and Maximum compression redraw the page more coarsely. There is no greyscale switch, no DPI field and no control that locks the file at a megabyte target.

Which PDFs actually get smaller?

Scans, photos and other image-heavy PDFs. A file that is mostly typed text, or that already uses efficient image compression, may barely change. If unused pages are the problem, delete or extract them first, then compress that shorter file. One PDF at a time.

Is PDF compression done on a server?

No. The selected PDF is rendered in this browser tab and is not uploaded to PDF North. The download is named from the original plus -compressed.pdf. Compare the original and new sizes on the page before you attach the file anywhere.

Can compression make a PDF larger?

Yes. A text-heavy or already-efficient file can grow because every page is redrawn as a JPEG. The result then shows the new size and that it is larger, and it suggests a stronger setting. Keep the original when the new file is not smaller or not readable.

Will Compress PDF hit a Gmail, Outlook or portal limit exactly?

No. The tool reports the new size. It does not aim at 25 MB, 20 MB, 5 MB, 2 MB or 1 MB. Gmail’s published attachment ceiling is 25 MB and Outlook.com’s is 20 MB. Many work mailboxes and forms are stricter, and chat apps set their own caps. Use the labelled size against the limit that actually failed.