CompressToFit

Limit reference

Microsoft Teams file size limit

Aim for

100MB

They advertise

250GB

As of , Microsoft Teams caps a file attached to a chat message at 100MB, with at most 10 attachments per chat. A file uploaded to a team's Files tab goes to SharePoint instead and can be up to 250GB.

Microsoft Teams’s own documentation

The catch

Aim for 100MB, not 250GB

Teams stores files in SharePoint, which takes 250GB per file -- but that is the limit for uploading to a team's Files tab. A file attached straight to a chat message is capped at 100MB, and that is the one people hit, because attaching to the chat is what the interface invites you to do.

If 100MB still gets rejected

Emailing a file to a channel's address is a third path with a limit of its own: each attachment must be under 10MB. If you are mailing a channel rather than attaching in the app, target 10MB.

Fall back to 10MB

The tool

Compress a file to fit Microsoft Teams

Video, images or PDFs, already set to 100MB. Runs on your machine — nothing is uploaded.

Step 1: where are you sending it?

1Where is it going?

2Add your file

Video, images and PDFs, all compressed on your own machine. No upload, no account, no watermark, no limit on how many files.

There is also a dedicated 100MB page

Reference

Other platform limits

Every one of them dated, and the advertised number next to the one that works.

All 15 limits, and the form specifications

Background

Why the limit bites, and what to do about it

All guides