September 24, 2026 · 7 min read

How to Send Large Files by Email or WhatsApp

Attachment bounced with "file too large"? Here's how to get big videos, photo sets and PDFs delivered: real size limits, compression and link sharing.

You attach a video, hit send, and it bounces: "file too large". Or WhatsApp accepts the video and the person on the other end gets something blurry. Both problems come from the same place — every service has a ceiling, and most of them silently re-encode anything that gets close to it. Here's how to get the file there, at a quality you chose rather than one imposed on you.

Know the ceiling you're hitting

Limits change and vary by plan, so treat these as the widely documented ballpark at the time of writing and check your own provider if it matters. The important thing is the shape of it: email limits are small, chat limits are bigger but come with re-encoding, and cloud links have effectively no limit.

One trap worth knowing: the receiving server's limit matters as much as yours. A 22 MB attachment leaves Gmail happily and bounces off a corporate server capped at 10 MB. And encoding an attachment for email adds roughly a third to its size, so a 20 MB file can arrive as about 27 MB of message.

Decide first: shrink it, or send a link?

• Shrink it when the recipient needs the file itself, when it's going into a form or portal, or when they're on a slow connection and a 2 GB download is unkind.
• Send a link when the file must stay pristine (a master video, a print-ready design) or when it's genuinely huge. WeTransfer, Google Drive, Dropbox and OneDrive all handle this.
• Do both when you're not sure: a small preview attached, the full file linked.

How to shrink each type of file

Most oversized attachments are one of three things, and each has an easy win.

• Photos. A modern phone photo is 3–8 MB, mostly detail nobody will see on screen. Re-saving at a sensible quality typically takes 70–90 percent off with no visible difference for screen viewing.
• PDFs. Bloat is almost always embedded images at print resolution. Compressing those is what shrinks the file; the text stays sharp.
• Videos. The biggest factor is bitrate, then resolution. A 4K clip re-encoded to 1080p is often a fraction of the size and looks identical on a phone.

Sending several files: zip, don't attach twenty

Ten separate attachments are more likely to trip a filter than one archive, and easier to lose. Compress the contents first, then zip the folder — right-click and Compress on macOS, Send to → Compressed folder on Windows. Zipping already-compressed photos saves almost nothing, so the order matters: shrink, then zip.

WhatsApp: why your video arrived blurry

WhatsApp re-encodes photos and videos you send through the gallery picker, which is why a crisp clip can land looking soft. If quality matters, attach it as a document instead (Attach → Document, choose the video) — it sends the file as-is. That's also why it's worth compressing on your own terms first: you control the trade-off instead of letting the app guess.

• Sending for someone to watch casually: the normal gallery route is fine.
• Sending footage someone will edit or print from: send as a document, or use a cloud link.
• Sending to a group on mobile data: compress it. Nobody wants a 900 MB download.

When it still bounces

• Check the bounce message — it usually names the exact limit that rejected you.
• Some servers block certain file types outright. Zipping sidesteps type filters but not size limits.
• Very long filenames and unusual characters occasionally break uploads. Rename to something plain.
• If a web form fails at 95 percent, it's often a timeout, not a size limit. A smaller file fixes both.

One thing to check before you send

Photos and videos straight off a phone can carry GPS coordinates, device details and timestamps. That's fine for a friend and less fine when the attachment is going to a landlord, a buyer, a client or a public mailing list. Compressing a file sometimes drops this data and sometimes keeps it, so if it matters, strip it deliberately rather than assuming.