Image Specs
Shared Image
| Max File Size | 100 MB |
|---|---|
| File Formats | JPG, PNG, GIF, WEBP |
| Notes | Images shared in chats are compressed by default; original quality option available |
Profile Photo
| Dimensions | 256 × 256 px recommended |
|---|---|
| Aspect Ratio | 1:1 |
| Max File Size | 50 MB |
| File Formats | JPG, PNG |
| Notes | Displayed as a circle; visible only to your contacts |
Sticker Pack
| Dimensions | 512 × 512 px per sticker |
|---|---|
| Max File Size | 1 MB per sticker |
| File Formats | PNG, WebP, APNG |
| Notes | Custom sticker packs can be created and shared; max 200 stickers per pack |
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Video & Audio Specs
Shared Video
| Max File Size | 100 MB |
|---|---|
| File Formats | MP4, MOV, AVI |
| Notes | Videos are end-to-end encrypted; compressed for delivery |
Voice Message
| File Formats | AAC, MP3 |
|---|---|
| Max Duration | Up to 5 minutes per clip |
| Notes | In-app recorded voice note; plays directly in chat |
Video Call
| Resolution | Up to 720p |
|---|---|
| Notes | End-to-end encrypted 1:1 and group video calls; up to 40 participants |
Text & Character Limits
Message
| Character Limit | No practical limit |
|---|---|
| Notes | Signal supports very long text messages; no documented hard cap |
Profile Name
| Character Limit | 26 characters |
|---|---|
| Notes | First and last name combined |
Profile About
| Character Limit | 140 characters |
|---|
Group Name
| Character Limit | 32 characters |
|---|
Profile Assets
Profile Photo
| Dimensions | 256 × 256 px |
|---|---|
| Max File Size | 50 MB |
| File Formats | JPG, PNG |
| Notes | Visible to contacts; displayed as a circle |