# How to send Sketch files

Sketch (Sketch design document) files are often too big for email and chat apps. Here is how big they get and how to send them exactly as they are.

_Source: https://sharelargefilesfree.com/send-sketch-files · Updated 2026-10-13_

**Quick answer:** To send a large Sketch file, upload it to Share Large Video Files (up to 20 GB, no account) and share the download link: the file arrives unchanged. An app design file is about 150 MB, more than most email providers accept.

## What is a Sketch file?

A .sketch file is a document from Sketch, the Mac design app used for app and website interfaces, icons and prototypes. One file can hold many pages, artboards, symbols and shared styles.

Sketch files are small when they are mostly vectors, but they grow with embedded bitmap images, such as photos, screenshots and mock-up backgrounds. Large product teams' files with hundreds of screens can reach hundreds of MB.

Extensions: .sketch.

## How big are Sketch files?

| File | Typical size |
| --- | --- |
| An icon set or small UI kit | about 1 to 20 MB |
| An app design with 50 to 100 screens and images | roughly 50 to 300 MB |
| A full design system library with photography | roughly 200 MB to 1 GB |

## Which apps can send one?

Can you send an app design file (about 150 MB) as an attachment?

| App | Limit | Fits? |
| --- | --- | --- |
| Gmail | 25 MB per email | No, send a link |
| Outlook.com | 20 to 25 MB per email | No, send a link |
| WhatsApp (document) | 2 GB per file | Yes |
| Telegram | 2 GB per file | Yes |
| Facebook Messenger | 100 MB per file | No, send a link |
| Discord (free) | 20 MB per file | No, send a link |
| Slack | 1 GB per file | Yes |
| WeTransfer (free) | 3 GB per transfer | Yes |
| **Share Large Video Files** | 20 GB per transfer | Send the link anywhere |

Limits from our [file size limits by app](https://sharelargefilesfree.com/file-size-limits-by-app) table, checked against each service's help pages.

## How to send Sketch files without changing them

1. Open [Share Large Video Files](https://sharelargefilesfree.com/) in any browser and choose **Get a link** (or **Send by email**).
2. Drop Sketch files on the upload box, or pick a whole folder. Up to 20 GB and 1000 files per transfer.
3. Optional: add a password, a download limit or an expiry under More options.
4. Copy the link (or show the QR code) and send it by chat or email. The recipient downloads the original file, byte for byte.

## Tips for sending Sketch files

- Include any shared library files the document uses, or the symbols may appear detached.
- List the fonts used and share them only if their licence allows.
- Export key screens as PNG or PDF for reviewers on Windows or phones.
- Zip the .sketch file with its libraries so they arrive as one download.

## How to open a Sketch file

**Sketch** runs on **Mac** only. **Figma** can import .sketch files in the browser on Windows or Mac, and Lunacy (free, Windows, Mac and Linux) opens them. Phones cannot edit Sketch files.

## Frequently asked questions

### Can I open a Sketch file on Windows?

Not in Sketch itself, which is Mac-only, but Figma can import it and Lunacy opens it on Windows.

### Why is my Sketch file so big?

Usually because of embedded photos and screenshots. Vector shapes take very little space.

### Do I need to send libraries with a Sketch file?

Yes, if the document uses symbols from shared libraries. Without them the recipient cannot update those symbols.